Author: "Université de Nantes (UN)-Université de Rennes 1 (UR1)" / Topic: 02 engineering and technology - Searchworks@Jio Institute Digital Library Search Results

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3,358 results on '"Université de Nantes (UN)-Université de Rennes 1 (UR1)"'

1. Slot-loaded patches with a switching mechanism to extend the scanning range of a phased array subject to scan blindness

Author: Renaud Loison, Isabelle Le Roy-Naneix, Christian Renard, Aurelien Ayissi Manga, Raphaël Gillard, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), THALES Airborne Systems [Elancourt], THALES [France], Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), THALES, Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), THALES SYSTEMES AEROPORTES, Laboratoire de Génie Electrique de Grenoble ( G2ELab ), Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut polytechnique de Grenoble - Grenoble Institute of Technology ( Grenoble INP ) -Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ) -Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut polytechnique de Grenoble - Grenoble Institute of Technology ( Grenoble INP ) -Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ), and Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: Computer science, Phased array, [ INFO.INFO-NI ] Computer Science [cs]/Networking and Internet Architecture [cs.NI], Impedance matching, Topology (electrical circuits), 02 engineering and technology, Antenna array, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Optics, 0202 electrical engineering, electronic engineering, information engineering, Range (statistics), coupling, Electrical and Electronic Engineering, Coupling, business.industry, 020208 electrical & electronic engineering, 020206 networking & telecommunications, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, [ SPI.TRON ] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics, Electronic, Optical and Magnetic Materials, Mechanism (engineering), antenna array, Proof of concept, scan blindness, business
Abstract: International audience; This article presents a novel solution to extend the scanning range of a cavity-backed stacked-patch phased array whose performances are limited by scan blindness. Two main aspects are investigated. The first section is a thorough description of the scan blindness mechanism and the associated mutual coupling scheme occurring in the reported array. The second section introduces a revised array topology that allows extending the scanning range up to the blind angle. The article focuses on the proof of concept of the proposed solution, which is based on the switching between two operating modes of the structure, each one covering a part of a globally wider scanning range. In the present case, the scanning capability of the array has been extended by 10 degrees in the scanning plane of interest. Besides, the restored impedance matching allows for a 2 dBi gain improvement at the scan blindness angle.
Published: 2018

2. Macro-to-micro transformation model for micro-expression recognition

Author: Hui Yuan, Xianye Ben, Weixiao Meng, Xitong Jia, Kidiyo Kpalma, School of Information Science and Engineering, Shandong University, Jinan 250100 ( SDU ), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin 150080, School of Information Science and Engineering, Shandong University, Jinan 250100 (SDU), Institut d'Électronique et des Technologies du numéRique (IETR), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), 61571274, National Natural Science Foundation of China, Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Université de Nantes (UN)-Université de Rennes 1 (UR1)
Subjects: General Computer Science, Computer science, Feature selection, [ SPI.SIGNAL ] Engineering Sciences [physics]/Signal and Image processing, 02 engineering and technology, Machine learning, computer.software_genre, Theoretical Computer Science, feature selection, Singular value decomposition, 0202 electrical engineering, electronic engineering, information engineering, Limit (mathematics), Macro, Performance model, business.industry, singular value decomposition, 020207 software engineering, Pattern recognition, 1 Introductions, micro-expression recognition, Transformation (function), Facial expression recognition, Modeling and Simulation, 020201 artificial intelligence & image processing, Artificial intelligence, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, computer, macro-to-micro transformation model
Abstract: International audience; As one of the most important forms of psychological behaviors, micro-expression can reveal the real emotion. However, the existing labeled training samples are limited to train a high performance model. To overcome this limit, in this paper we propose a macro-to-micro transformation model which enables to transfer macro-expression learning to micro-expression. Doing so improves the efficiency of the micro-expression features. For this purpose, LBP and LBP-TOP are used to extract macro-expression features and micro-expression features, respectively. Furthermore, feature selection is employed to reduce redundant features. Finally, singular value decomposition is employed to achieve macro-to-micro transformation model. The experimental evaluation based on the incorporated database including CK+ and CASME2 demonstrates that the proposed model achieves a competitive performance compared with the existing micro-expression recognition methods.
Published: 2018

3. An Embedded Double Reference Transmission Line Theory Applied to Cable Harnesses

Author: Sofiane Chabane, Marco Klingler, Philippe Besnier, CEM et intégrité de signal, Institut d'Électronique et des Technologies du numéRique (IETR), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (NU)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), PSA Peugeot-Citroen, PSA Peugeot Citroën (PSA), French C.N.R.S., Groupe PSA, Université de Nantes (UN)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)
Subjects: multi-conductor transmission lines, 02 engineering and technology, Radiation, high frequencies, Electromagnetic interference, crosstalk, Transmission line, 0202 electrical engineering, electronic engineering, information engineering, electromagnetic compatibility (EMC), Electrical and Electronic Engineering, Electrical conductor, Ground plane, Physics, cable harnesses, Mathematical analysis, Electromagnetic compatibility, 020206 networking & telecommunications, Condensed Matter Physics, electromagnetic interference, Atomic and Molecular Physics, and Optics, Conductor, radiation, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, Bundle, automotive, transmission line theory (TLT)
Abstract: International audience; In this paper, an embedded double reference transmission line theory (EDRTLT) is presented. This approach is based upon taking an arbitrary wire among the í µí² wires constituting the harness and considering it as an internal reference conductor. Then the initial transmission line of í µí² wires above a ground reference is split into two coupled subsets of wires. The internal subset is composed of í µí² − í µí¿ wires with the internal reference wire as the return wire. The per unit length (p.u.l.) parameters of this internal transmission line are calculated with respect to this internal reference wire. They do not depend on the ground reference. The external subset is composed of only the internal reference wire with the ground plane as a reference. As a result, any change of relative position of the bundle and the ground reference involves the p.u.l. calculation of a mono-conductor transmission line. This double reference transmission line theory is shown to be equivalent to the classical single reference approach and the corresponding p.u.l. parameters are approximately retrieved from those of the single reference transmission lines to form the EDRTLT. The results obtained by this theory are in good agreement with those obtained from the single reference case where all p.u.l. parameters are directly calculated using the ground plane as a single reference. The main advantage provided by the EDRTLT is to reduce the complexity of analysis of the bundle-to-ground interaction.
Published: 2018

4. SCOM: Spatiotemporal Constrained Optimization for Salient Object Detection

Author: Chen Xu, Yuhuan Chen, Xia Li, Yi Tang, Nikos Komodakis, Wenbin Zou, College of Mathematics, Shenzhen University, Département Image et Automatique, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Shenzhen Key Laboratory of Sensor Technology, The Chinese University of Hong Kong [Hong Kong], École des Ponts ParisTech (ENPC), Laboratoire d'Informatique Gaspard-Monge (LIGM), Université Paris-Est Marne-la-Vallée (UPEM)-École des Ponts ParisTech (ENPC)-ESIEE Paris-Fédération de Recherche Bézout-Centre National de la Recherche Scientifique (CNRS), 6171101606, National Natural Science Foundation of China, KQJSCX20170327151357330, Natural Science Foundation of Shenzhen, Interdisciplinary Innovation Team of Shenzhen University, 827-000152, Natural Science Foundation of SZU, Centre National de la Recherche Scientifique (CNRS)-CentraleSupélec-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Université de Nantes (UN)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-CentraleSupélec-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Centre National de la Recherche Scientifique (CNRS)-Fédération de Recherche Bézout-ESIEE Paris-École des Ponts ParisTech (ENPC)-Université Paris-Est Marne-la-Vallée (UPEM), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Nantes Université (NU)-Université de Rennes 1 (UR1), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: Computer science, Feature extraction, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Optical flow, 02 engineering and technology, 050105 experimental psychology, Salience (neuroscience), Robustness (computer science), Motion estimation, 0202 electrical engineering, electronic engineering, information engineering, 0501 psychology and cognitive sciences, Computer vision, Saliency map, ComputingMilieux_MISCELLANEOUS, business.industry, 05 social sciences, Constrained optimization, [INFO.INFO-CV]Computer Science [cs]/Computer Vision and Pattern Recognition [cs.CV], Computer Graphics and Computer-Aided Design, Object detection, Constraint (information theory), 020201 artificial intelligence & image processing, Artificial intelligence, business, Software, Change detection
Abstract: This paper presents a novel model for video salient object detection called spatiotemporal constrained optimization model (SCOM), which exploits spatial and temporal cues, as well as a local constraint, to achieve a global saliency optimization. For a robust motion estimation of salient objects, we propose a novel approach to modeling the motion cues from optical flow field, the saliency map of the prior video frame and the motion history of change detection, which is able to distinguish the moving salient objects from diverse changing background regions. Furthermore, an effective objectness measure is proposed with intuitive geometrical interpretation to extract some reliable object and background regions, which provided as the basis to define the foreground potential, background potential, and the constraint to support saliency propagation. These potentials and the constraint are formulated into the proposed SCOM framework to generate an optimal saliency map for each frame in a video. The proposed model is extensively evaluated on the widely used challenging benchmark data sets. Experiments demonstrate that our proposed SCOM substantially outperforms the state-of-the-art saliency models.
Published: 2018

5. Angular Based Beamforming and Power Allocation Framework in a Multi-User Millimeter-Wave Massive MIMO System

Author: Maryline Hélard, Antoine Roze, Mohamed Shehata, Matthieu Crussière, Charlotte Langlais, Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Lab-STICC_TB_CACS_IAS, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Département Electronique (IMT Atlantique - ELEC), IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Institut National des Sciences Appliquées - Rennes ( INSA Rennes ), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance ( Lab-STICC ), École Nationale d'Ingénieurs de Brest ( ENIB ) -Université de Bretagne Sud ( UBS ) -Université de Brest ( UBO ) -Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques ( IBNM ), Université de Brest ( UBO ) -Université européenne de Bretagne ( UEB ) -ENSTA Bretagne-Institut Mines-Télécom [Paris]-Centre National de la Recherche Scientifique ( CNRS ) -École Nationale d'Ingénieurs de Brest ( ENIB ) -Université de Bretagne Sud ( UBS ) -Université de Brest ( UBO ) -Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques ( IBNM ), Université de Brest ( UBO ) -Université européenne de Bretagne ( UEB ) -ENSTA Bretagne-Institut Mines-Télécom [Paris]-Centre National de la Recherche Scientifique ( CNRS ), Département Electronique ( ELEC ), IMT Atlantique Bretagne-Pays de la Loire ( IMT Atlantique ), Institut National des Sciences Appliquées (INSA), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), IMT Atlantique (IMT Atlantique), and Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: Beamforming, Leakage based power allocation, Digital beamsteering, mmWave, 060102 archaeology, Computer science, MIMO, 020206 networking & telecommunications, DoA, 06 humanities and the arts, 02 engineering and technology, Spectral efficiency, [ SPI.SIGNAL ] Engineering Sciences [physics]/Signal and Image processing, Multi-user, LOS channel, Precoding, Extremely high frequency, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, 0601 history and archaeology, Massive MIMO, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Communication channel
Abstract: International audience; Millimeter-Wave (mmWave) systems offer extremely large Band-Width (BW) and highly Line-of-Sight (LOS) dominant channels. Many beamforming and power allocation techniques have recently emerged to leverage such channel characteristics in order to enhance the sum capacity and the coverage for multi-user transmissions. However, most of the existing algorithms are practically limited due to full channel knowledge and high complexity requirements. In this paper we introduce a novel, low complexity, angular based beamforming and power allocation framework, that requires the knowledge of the main contributive Directions of Arrival/Departure (DoAs/DoDs) of the propagation channel only. Exploiting the fact that propagation conditions are highly driven by the geometrical structure of the channel in mmWave scenarios, our method relies on the estimation of the leakage caused by each User Equipment (UE) on all the other UEs, approximated from the DoAs contributions. We prove with the simulation results that this approach, in addition to be practically plausible, can enhance the network Spectral Efficiency (SE) alongside with maintaining acceptable data rates for the cell edge UEs.
Published: 2018

6. A Fast and Fuzzy Functional Simulator of Inexact Arithmetic Operators for Approximate Computing Systems

Author: Daniel Menard, Karol Desnos, Maxime Pelcat, Justine Bonnot, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Institut d'Electronique et de Télécommunications de Rennes (IETR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Centre National de la Recherche Scientifique (CNRS), Institut Pascal (IP), SIGMA Clermont (SIGMA Clermont)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Grant ANR-15-CE25-0015 (ARTEFaCT project), French Agence Nationale de la Recherche, ANR-15-CE25-0015,ARTEFaCT,Circuits flexibles et calcul approximatif pour l'Internet des Objets(2015), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -SUPELEC-Centre National de la Recherche Scientifique ( CNRS ), Institut Pascal - Clermont Auvergne ( IP ), Sigma CLERMONT ( Sigma CLERMONT ) -Université Clermont Auvergne ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES), SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), and Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: 010302 applied physics, Emulation, [ INFO.INFO-TS ] Computer Science [cs]/Signal and Image Processing, Workstation, Computer science, 02 engineering and technology, Operand, 01 natural sciences, Fuzzy logic, 020202 computer hardware & architecture, law.invention, Instruction set, Variable (computer science), Operator (computer programming), [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, law, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Memory footprint, Algorithm
Abstract: International audience; Inexact operators are developed to exploit the tolerance of an application to imprecisions. These operators aim at reducing system energy consumption and memory footprint. In order to integrate the appropriate inexact operators in a complex system, the Quality of Service of the approximate system must be thoroughly studied through simulation. However, when simulating on a PC or workstation , the custom bit-level structures of inexact operators are not implemented in the instruction set of the simulating architecture. Consequently, the simulation requires a costly emulation, leading to expensive bit-level simulations. This paper proposes a new "Fast and Fuzzy" functional simulation method for inexact operators whose probabilistic behavior is correlated with the Most Significant Bits of the input operands. The proposed method processes real signal data and simplifies the error model for inexact operators, accelerating the simulation of the system. The modelization accuracy of the error can be controlled by a parameter called fuzzyness degree F. Using the proposed method, the bit-accurate logic-level simulation of inexact operators is replaced by an exact operator to which a pseudo-random error variable is added. Experiments on 16-bit operators show that the proposed simulation method, when compared to a bit-accurate logic level simulation, is up to 44 times faster.
Published: 2018

7. Stochastic Modeling to Accelerate Approximate Operators Simulation

Author: Daniel Menard, Justine Bonnot, Karol Desnos, Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: 010302 applied physics, Structure (mathematical logic), [ INFO.INFO-TS ] Computer Science [cs]/Signal and Image Processing, Computer science, Stochastic process, Approximation algorithm, 02 engineering and technology, Logic level, 01 natural sciences, 020202 computer hardware & architecture, Operator (computer programming), [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Algorithm, Random variable
Abstract: International audience; —Approximate operators have been developed to overcome the performance limitations of the original accurate arithmetic operators. They trade off the output quality of the operator and its energy consumption, area or delay. To benefit from this trade-off, the logic structure of the original accurate operator is modified. When integrating approximate operators in a complex system, numerous simulations of the application are required to ensure the fulfillment of the application requirements, despite the induced approximations. Because the hardware implementation of approximate operators is not always available in early phases of application prototyping, long software simulation of their complex bit-level structure has to be used. This paper proposes a fast simulator for approximate operators built from the output values of the original accurate operator. The error due to the approximation is modeled by a stochastic process whose features are learned from the errors of the approximate operator. The proposed simulator is compared to the bit-accurate logic-level simulation and to a simulator of approximate operators built on the input values of the operator. Experiments on 10-bit operators show that the proposed method is up to 63× faster than a bit-accurate logic level simulation.
Published: 2018

8. Multibeam Pillbox Antenna Integrating Amplitude-Comparison Monopulse Technique in the 24 GHz Band for Tracking Applications

Author: Karim Tekkouk, Mauro Ettorre, Ronan Sauleau, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: Beamforming, [ INFO.INFO-NI ] Computer Science [cs]/Networking and Internet Architecture [cs.NI], Amplitude-Comparison Monopulse, 0211 other engineering and technologies, monopulse antenna, 02 engineering and technology, Antenna array, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Optics, substrate integrated waveguide (SIW), 0202 electrical engineering, electronic engineering, information engineering, Standing wave ratio, Electrical and Electronic Engineering, Computer Science::Information Theory, 021101 geological & geomatics engineering, Physics, business.industry, 020206 networking & telecommunications, [ SPI.TRON ] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics, Cardinal point, Monopulse radar, Antenna gain, business, Slotted waveguide
Abstract: An amplitude-comparison monopulse slotted waveguide antenna array with a pillbox parabolic quasi-optical beamforming network is proposed in substrate integrated waveguide (SIW) technology in the 24 GHz band. The beamformer is illuminated by a cluster of horn pairs located in the focal plane of the pillbox reflector. Each horn pair is composed of two H-plane sectorial horns connected to a coupler. In-phase and out-of-phase operations of each horn pair allow radiation of the $\Sigma $ and $\Delta $ beams along the antenna scanning plane (E-plane). At the design frequency of 24.15 GHz, the experimental results demonstrate an antenna field of view of ± 26°, with null depth better than −20 dB for all the measured $\Delta $ beams. The antenna gain varies between 21.6 and 20.5 dBi for the $\Sigma $ beams and the measured input reflection bandwidth is about 2.4% for VSWR < 2.
Published: 2018

9. Design criteria of X-wave launchers for millimeter-wave applications

Author: Mauro Ettorre, Matteo Albani, Guido Valerio, Davide Comite, Walter Fuscaldo, Santi C. Pavone, Alessandro Galli, Dipartimento di Ingegneria dell'Informazione, Elettronica e Telecomunicazioni [Roma] (DIET), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome], Dipartimento di Ingegneria dell'informazione e scienze matematiche [Siena] (DIISM), Università degli Studi di Siena = University of Siena (UNISI), Laboratoire d'Electronique et Electromagnétisme (L2E), Sorbonne Université (SU), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Roma 'La Sapienza' [Rome], Department of Information Engineering [Sienne] (DII), Università degli Studi di Siena (UNISI), Institut d'Electronique et de Télécommunications de Rennes (IETR), Dipartimento di Ingegneria dell'Informazione, Elettronica e Telecomunicazioni [Roma] ( DIET ), Dipartimento di Ingegneria dell'informazione e scienze matematiche [Siena] ( DIISM ), Università di siena 1240 [Siena], Laboratoire d'Electronique et Electromagnétisme ( L2E ), Université Pierre et Marie Curie - Paris 6 ( UPMC ), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Nantes Université (NU)-Université de Rennes 1 (UR1), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)
Subjects: Computer science, X-waves, 02 engineering and technology, Bessel beams, 01 natural sciences, Bessel Beams, Localized Waves, X-Waves, [SPI]Engineering Sciences [physics], 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Electrical and Electronic Engineering, Wideband, 010306 general physics, ComputingMilieux_MISCELLANEOUS, Physics, localized waves, millimeter waves, 020208 electrical & electronic engineering, Astrophysics::Instrumentation and Methods for Astrophysics, 020206 networking & telecommunications, nondiffracting waves, Large aperture, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, Extremely high frequency, [ SPI.ELEC ] Engineering Sciences [physics]/Electromagnetism, X-wave, Millimeter, Microwave
Abstract: Bessel-beam launchers are promising and established technologies for focusing applications at microwaves. Their use in time-domain leads to the definition of a new class of devices, namely, the X-wave launchers. In this work, we discuss the focusing features of such devices with a specific interest at millimeter waves. The spatial resolutions of such systems are described under a rigorous mathematical framework to derive novel operating conditions for designing X-wave launchers. These criteria might be particularly appealing for specific millimeter-wave applications. In particular, it is shown that an electrically large aperture is not strictly required, as it seemed from previous works. However, the use of an electrically small aperture would demand a considerably wideband capability. The various discussions presented here provide useful information for the design of X-wave launchers. This aspect is finally shown with reference to the practical design of two different X-wave launchers.
Published: 2018

10. Self-identification algorithm for zeolite-based thermal capacity gas sensor

Author: Hussein Awala, S. Inoue, A. Mita-Tixier, Yoshio Mita, Didier Robbes, Svetlana Mintova, Maxime Harnois, Corentin Jorel, Mathieu Pouliquen, C. Radu, O. De Sagazan, Eric Lebrasseur, Julien Grand, Yuki Okamoto, Kentaro Yamada, Matthieu Denoual, Laboratoire d'automatique de Caen (LAC), École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Equipe Electronique - Laboratoire GREYC - UMR6072, Groupe de Recherche en Informatique, Image et Instrumentation de Caen (GREYC), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Laboratory for Integrated Micro Mechatronics Systems (LIMMS), Centre National de la Recherche Scientifique (CNRS)-The University of Tokyo (UTokyo), Laboratoire catalyse et spectrochimie (LCS), Normandie Université (NU)-Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Université de Caen Normandie (UNICAEN), Institut d'Électronique et des Technologies du numéRique (IETR), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), The University of Tokyo (UTokyo), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Denain Anzin Minéraux, National Institute for Plasma and Radiation Physics ( NILPRP ), Centre de recherche, Groupe de Recherche en Informatique, Image, Automatique et Instrumentation de Caen ( GREYC ), Université de Caen Normandie ( UNICAEN ), Normandie Université ( NU ) -Normandie Université ( NU ) -Ecole Nationale Supérieure d'Ingénieurs de Caen ( ENSICAEN ), Normandie Université ( NU ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Caen Normandie ( UNICAEN ), Normandie Université ( NU ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire catalyse et spectrochimie ( LCS ), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies ( FEMTO-ST ), Université de Technologie de Belfort-Montbeliard ( UTBM ) -Ecole Nationale Supérieure de Mécanique et des Microtechniques ( ENSMM ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Franche-Comté ( UFC ), Institute for Material Research ( IMR ), Tohoku University [Sendai], Institute for Solid State Physics, The University of Tokyo, Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), The University of Tokyo (UTokyo)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and intelligente Semiconductor Microsystem Laboratory (iSML)
Subjects: Materials science, Silicon, chemistry.chemical_element, zeolites, 02 engineering and technology, engineering.material, 01 natural sciences, Heat capacity, thermal capacity gas sensor, 010309 optics, Condensed Matter::Materials Science, Coating, 0103 physical sciences, Thermal, [ SPI ] Engineering Sciences [physics], system identification algorithm, Electrical and Electronic Engineering, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Zeolite, ComputingMilieux_MISCELLANEOUS, [ PHYS ] Physics [physics], Atmospheric pressure, Extraction (chemistry), 021001 nanoscience & nanotechnology, Condensed Matter Physics, Microstructure, Electronic, Optical and Magnetic Materials, chemistry, Hardware and Architecture, engineering, 0210 nano-technology, Algorithm
Abstract: International audience; We demonstrate a new operation mode of thermal gas sensor based on thermal capacity extraction with identification algorithm. The system is a silicon microstructure covered with zeolites operated at constant temperature while stimulated by heat pseudo-random sequence. The proposed detection principle is demonstrated at room temperature and atmospheric pressure through the detection of gas water molecules with an hydrophilic FAU-type zeolite coating. The identification algorithm is a continuous-time closed-loop identification algorithm based on the instrumental variable principle.
Published: 2018

11. Determination of the Equivalent Coupling Surface of Passive Components Using the TEM Cell

Author: Richard Perdriau, Mohamed Ramdani, Frederic Lafon, Marine Stojanovic, Sjoerd Op 't Land, ESEO - RF-EMC ( RF-EMC ), ESEO-Tech, PRES Université Nantes Angers Le Mans ( UNAM ) -PRES Université Nantes Angers Le Mans ( UNAM ), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), ESEO - RF-EMC (RF-EMC), Université Bretagne Loire (UBL)-Université Bretagne Loire (UBL), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université Bretagne Loire (UBL)-École supérieure d'électronique de l'ouest [Angers] (ESEO)-Université Bretagne Loire (UBL)-École supérieure d'électronique de l'ouest [Angers] (ESEO), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: Coupling, Materials science, Acoustics, Electromagnetic compatibility, 020206 networking & telecommunications, 02 engineering and technology, Condensed Matter Physics, Inductor, Inductive coupling, Atomic and Molecular Physics, and Optics, Inductance, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, visual_art, Electronic component, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, visual_art.visual_art_medium, [ SPI.ELEC ] Engineering Sciences [physics]/Electromagnetism, Direct coupling, Electrical and Electronic Engineering, Coupling coefficient of resonators, ComputingMilieux_MISCELLANEOUS
Abstract: The design of cheaper and more compact electromagnetic compatibility (EMC) filters can be achieved by exploiting the magnetic coupling between components. This requires the knowledge of coupling coefficients between components and, consequently, of their equivalent coupling surface. The aim of this paper is to present how this coupling surface can be determined using a transverse electromagnetic mode cell. This methodology is described and applied to two different cases: a capacitor and an inductor. In order to validate the determination and usage of equivalent coupling surfaces, a comparison between the calculation and measurement of mutual inductances is carried out on practical examples.
Published: 2018

12. A Systematic Literature Review of Technologies for Suicidal Behavior Prevention

Author: Juan Luis Muñoz-Sánchez, Beatriz Sainz-De-Abajo, Gema Castillo-Sánchez, Sofiane Hamrioui, Isabel de la Torre-Díez, Manuel A. Franco-Martín, Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Institut d'Électronique et des Technologies du numéRique (IETR), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Université de Nantes (UN)-Université de Rennes 1 (UR1)
Subjects: [ INFO ] Computer Science [cs], 020205 medical informatics, Adolescent Health, Medicine (miscellaneous), Health Informatics, 02 engineering and technology, PsycINFO, Cochrane Library, Suicide prevention, Health informatics, Social networks, Social Networking, Machine Learning, 03 medical and health sciences, 0302 clinical medicine, Health Information Management, Intervention (counseling), 0202 electrical engineering, electronic engineering, information engineering, Humans, [INFO]Computer Science [cs], 030212 general & internal medicine, mHealth, ComputingMilieux_MISCELLANEOUS, Medical education, Internet, business.industry, Technological evolution, Mobile Applications, Web, mhealth, 3. Good health, Systematic review, Smartphone, Psychology, business, Information Systems
Abstract: Suicide is the second cause of death in young people. The use of technologies as tools facilitates the detection of individuals at risk of suicide thus allowing early intervention and efficacy. Suicide can be prevented in many cases. Technology can help people at risk of suicide and their families. It could prevent situations of risk of suicide with the technological evolution that is increasing. This work is a systematic review of research papers published in the last ten years on technology for suicide prevention. In September 2017, the consultation was carried out in the scientific databases PubMed, ScienceDirect, PsycINFO, The Cochrane Library and Google Scholar. A general search was conducted with the terms "prevention" AND "suicide" AND "technology. More specific searches included technologies such as "Web", "mobile", "social networks", and others terms related to technologies. The number of articles found following the methodology proposed was 90, but only 30 are focused on the objective of this work. Most of them were Web technologies (51.61%), mobile solutions (22.58%), social networks (12.90%), machine learning (3.23%) and other technologies (9.68%). According to the results obtained, although there are technological solutions that help the prevention of suicide, much remains to be done in this field. Collaboration among technologists, psychiatrists, patients, and family members is key to advancing the development of new technology-based solutions that can help save lives.
Published: 2018

13. Power Control and Cell Discontinuous Transmission used as a means of decreasing Small-Cell Networks’ Energy Consumption

Author: Remi Bonnefoi, Jacques Palicot, Christophe Moy, Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), 1/2 ARED + 1/2 ANR, ANR-14-CE28-0025,SOGREEN,Réseau électrique intelligent pour l'amélioration de l'efficacité énergétique des réseaux cellulaires ( 2014 ), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Signal, Communication et Electronique Embarquée (SCEE), Institut d'Electronique et de Télécommunications de Rennes (IETR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR), ANR-14-CE28-0025,SOGREEN,Réseau électrique intelligent pour l'amélioration de l'efficacité énergétique des réseaux cellulaires(2014), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Université de Rennes (UNIV-RENNES), and Université de Nantes (UN)-Université de Rennes 1 (UR1)
Subjects: Cell Discontinuous Transmission (DTx), Mathematical optimization, [ INFO.INFO-TS ] Computer Science [cs]/Signal and Image Processing, Computer Networks and Communications, Computer science, [ INFO.INFO-NI ] Computer Science [cs]/Networking and Internet Architecture [cs.NI], 02 engineering and technology, Small-Cell Networks, Base station, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], 0203 mechanical engineering, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Power Control, 0202 electrical engineering, electronic engineering, information engineering, Discontinuous transmission, Renewable Energy, Sustainability and the Environment, Quality of service, 020302 automobile design & engineering, 020206 networking & telecommunications, Energy consumption, Transmitter power output, Index Terms—Cell Discontinuous Transmission (DTx), Green Networks, Small cell, Energy (signal processing), Power control
Abstract: International audience; In this article, we analyze the issues of power control and Cell Discontinuous Transmission (Cell DTx) in a small-cell network. More precisely, we evaluate the performance of a policy, thanks to which each base station minimizes its own energy consumption. We have recently proposed this policy in a mono-cell scenario and we extend the scope of our previous work in this article, as we propose to use this policy in a multi-cell network. For that purpose, we first consider a network made of two base stations, in which we can compute the minimum network's energy consumption, which enables to provide users with the requested quality of service. If we compare the proposed policy with this minimum, we can demonstrate that the proposed policy has a good performance, which, however, can be improved by reducing the maximum transmit power of the base station. Then, we apply our algorithm in the case of a dense network, in which the proposed policy outperforms other policies and provides a 6% gain in energy, where compared to a policy featuring no power control. We show that the reduction of the maximum transmit power can increase this gain up to 11% of the network's energy consumption.
Published: 2018

14. Adaptive Wavelet Packet Modulation

Author: Marwa Chafii, Rémi Gribonval, Faouzi Bader, Jacques Palicot, Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Parcimonie et Nouveaux Algorithmes pour le Signal et la Modélisation Audio ( PANAMA ), Inria Rennes – Bretagne Atlantique, Institut National de Recherche en Informatique et en Automatique ( Inria ) -Institut National de Recherche en Informatique et en Automatique ( Inria ) -SIGNAUX ET IMAGES NUMÉRIQUES, ROBOTIQUE ( IRISA_D5 ), Institut de Recherche en Informatique et Systèmes Aléatoires ( IRISA ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -Université de Bretagne Sud ( UBS ) -École normale supérieure - Rennes ( ENS Rennes ) -Institut National de Recherche en Informatique et en Automatique ( Inria ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ) -IMT Atlantique Bretagne-Pays de la Loire ( IMT Atlantique ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -Université de Bretagne Sud ( UBS ) -École normale supérieure - Rennes ( ENS Rennes ) -Institut National de Recherche en Informatique et en Automatique ( Inria ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ) -IMT Atlantique Bretagne-Pays de la Loire ( IMT Atlantique ) -Institut de Recherche en Informatique et Systèmes Aléatoires ( IRISA ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -Université de Bretagne Sud ( UBS ) -École normale supérieure - Rennes ( ENS Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ) -IMT Atlantique Bretagne-Pays de la Loire ( IMT Atlantique ), Projet TEPN, ANR-10-LABX-07-01,labex Cominlabs,Laboratoire d'excellence CominLabs ( 2013 ), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Parcimonie et Nouveaux Algorithmes pour le Signal et la Modélisation Audio (PANAMA), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-SIGNAUX ET IMAGES NUMÉRIQUES, ROBOTIQUE (IRISA-D5), Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), ANR-10-LABX-0007,COMIN Labs,Digital Communication and Information Sciences for the Future Internet(2010), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université de Bretagne Sud (UBS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National de Recherche en Informatique et en Automatique (Inria)-École normale supérieure - Rennes (ENS Rennes)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-CentraleSupélec-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Bretagne Sud (UBS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-École normale supérieure - Rennes (ENS Rennes)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Rennes 1 (UR1), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique)
Subjects: Computer science, Bandwidth (signal processing), 020302 automobile design & engineering, 020206 networking & telecommunications, Link adaptation, 02 engineering and technology, Data_CODINGANDINFORMATIONTHEORY, [ SPI.SIGNAL ] Engineering Sciences [physics]/Signal and Image processing, Wavelet packet decomposition, Channel capacity, Narrowband, 0203 mechanical engineering, Modulation, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Fading, Electrical and Electronic Engineering, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Communication channel, Computer Science::Information Theory
Abstract: International audience; In this paper, we propose a new adaptive modulation based on the wavelet packet transform, which targets a good resistance against frequency selective channels while avoiding a large PAPR. Classical multi-carrier modulation schemes divide the channel bandwidth into narrowband sub-channels to improve its robustness against frequency selective fading. However, they suffer from the peak-to-average power ratio (PAPR) problem which occurs due to a random constructive addition of sub-carriers. By contrast, single carrier modulation schemes, where each transmitted symbol fully occupies the bandwidth, are more sensitive to frequency selective environments and less affected by the PAPR problem. In this work, we show how the bandwidth division can be reconfigurable and adapted to the channel properties, and we provide several examples to prove that the proposed adaptive modulation represents an alternative modulation which is adjustable between two extreme cases: single carrier modulation and classical multi-carrier modulation.
Published: 2018

15. Chalcogenide glass-ceramic with self-organized heterojunctions application to photovoltaic solar cells

Author: Jean-Luc Adam, Jean-Jacques Simon, Laurent Le Brizoual, Bo Fan, Xianghua Zhang, Hervé Lhermite, Michel Cathelinaud, Marcel Pasquinelli, Hongli Ma, Ilia Korolkov, Odile Merdrignac, Laurent Calvez, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Institut d'Électronique et des Technologies du numéRique (IETR), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Institut des Sciences Chimiques de Rennes ( ISCR ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Ecole Nationale Supérieure de Chimie de Rennes-Institut National des Sciences Appliquées ( INSA ) -Centre National de la Recherche Scientifique ( CNRS ), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Institut des Matériaux, de Microélectronique et des Nanosciences de Provence ( IM2NP ), Aix Marseille Université ( AMU ) -Université de Toulon ( UTLN ) -Centre National de la Recherche Scientifique ( CNRS ), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Université de Nantes (UN)-Université de Rennes 1 (UR1)
Subjects: Materials science, heterojunction, Chalcogenide, [ INFO.INFO-NI ] Computer Science [cs]/Networking and Internet Architecture [cs.NI], lcsh:TJ807-830, lcsh:Renewable energy sources, Chalcogenide glass, 02 engineering and technology, 7. Clean energy, 01 natural sciences, 010309 optics, chemistry.chemical_compound, chalcogenide, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Sputtering, 0103 physical sciences, Electrical and Electronic Engineering, Thin film, photovoltaic solar cells, Renewable Energy, Sustainability and the Environment, business.industry, Photovoltaic system, Energy conversion efficiency, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Amorphous solid, [ SPI.TRON ] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics, Semiconductor, chemistry, glass-ceramics, Optoelectronics, 0210 nano-technology, business
Abstract: In this work, we present for the first time the concept of chalcogenide glass-ceramic for photovoltaic applications with the GeSe2–Sb2Se3–CuI system. It has been demonstrated that thin films, deposited with the sputtering technique, are amorphous and can be crystallized with appropriate heat treatment. The thin film glass-ceramic behaves as a p-type semiconductor, even if it contains p-type Cu2GeSe3and n-type Sb2Se3. The conductivity of Sb2Se3has been greatly improved by appropriate iodine doping. The first photovoltaic solar cells based on the association of iodine-doped Sb2Se3and the glass-ceramic thin films give a short-circuit current density JSCof 10 mA/cm2and an open-circuit voltage VOCof 255 mV, with a power conversion efficiency of about 0.9%.
Published: 2018

16. Load Balancing Algorithm for Efficient and Reliable IoT Communications within E-Health Environment

Author: Sofiane Hamrioui, Pascal Lorenz, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Modélisation, Intelligence, Processus et Système (MIPS), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Modélisation, Intelligence, Processus et Systèmes, EA2032 ( MIPS ), IUT de Colmar, Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Ecole Nationale Supérieure d'Ingénieur Sud Alsace-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-IUT de Colmar-IUT de Mulhouse, and Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: Flow control (data), [ INFO ] Computer Science [cs], 020205 medical informatics, Adaptive algorithm, Computer science, Transmission Control Protocol, Quality of service, 020206 networking & telecommunications, Throughput, 02 engineering and technology, Load balancing (computing), 7. Clean energy, Load management, Transport layer, 0202 electrical engineering, electronic engineering, information engineering, Algorithm design, [INFO]Computer Science [cs], Algorithm, ComputingMilieux_MISCELLANEOUS, Efficient energy use
Abstract: The objective of the work carried out in this paper is to propose a novel load balancing algorithm that adapts the functioning of transport layer to the characteristics of the IoT (Internet of Things) communications when applied to e-health applications. The proposed algorithm is called LBA-Ie (Load Balancing Algorithm for IoT communications within e-health environment) and it is based on the integration of IoT communication parameters in the flow control process supported by TCP (Transmission Control Protocol). LBA-Ie is self-organized and adaptive algorithm by taking into account the changes occurred within the network, the links situations and the objects parameters. LBA-Ie is evaluated in terms of QoS (Quality of Service) and energy efficiency. The simulation results are compared to those obtained by three other solutions. LBA-Ie improves the QoS of IoT communications by increasing the data reliability which improves then the e-health applications. LBA-Ie allows also economizing the consumed energy by the objects and increase then their average lifetime.
Published: 2017

17. A Systematic Review of Techniques and Sources of Big Data in the Healthcare Sector

Author: Joel J. P. C. Rodrigues, Sofiane Hamrioui, Susel Góngora Alonso, Isabel de la Torre Díez, Miguel López-Coronado, Simula Research Laboratory [Lysaker] (SRL), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Simula Research Laboratory [Lysaker] ( SRL ), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: 0301 basic medicine, [ INFO ] Computer Science [cs], Databases, Factual, media_common.quotation_subject, Big data, Scopus, Health Care Sector, Medicine (miscellaneous), Health Informatics, 02 engineering and technology, Health informatics, 03 medical and health sciences, Health Information Management, Health care, 0202 electrical engineering, electronic engineering, information engineering, Humans, Medicine, Quality (business), [INFO]Computer Science [cs], Health sector, Data mining, ComputingMilieux_MISCELLANEOUS, media_common, Internet, business.industry, Research, Social Support, Sources, Data science, Techniques, 3. Good health, Identification (information), 030104 developmental biology, Work (electrical), Chronic diseases, 020201 artificial intelligence & image processing, business, Cell Phone, Information Systems
Abstract: The main objective of this paper is to present a review of existing researches in the literature, referring to Big Data sources and techniques in health sector and to identify which of these techniques are the most used in the prediction of chronic diseases. Academic databases and systems such as IEEE Xplore, Scopus, PubMed and Science Direct were searched, considering the date of publication from 2006 until the present time. Several search criteria were established as 'techniques' OR 'sources' AND 'Big Data' AND 'medicine' OR 'health', 'techniques' AND 'Big Data' AND 'chronic diseases', etc. Selecting the paper considered of interest regarding the description of the techniques and sources of Big Data in healthcare. It found a total of 110 articles on techniques and sources of Big Data on health from which only 32 have been identified as relevant work. Many of the articles show the platforms of Big Data, sources, databases used and identify the techniques most used in the prediction of chronic diseases. From the review of the analyzed research articles, it can be noticed that the sources and techniques of Big Data used in the health sector represent a relevant factor in terms of effectiveness, since it allows the application of predictive analysis techniques in tasks such as: identification of patients at risk of reentry or prevention of hospital or chronic diseases infections, obtaining predictive models of quality.
Published: 2017

18. Design of a 2-bit Unit-Cell for Electronically Reconfigurable Transmitarrays at Ka-band

Author: Luca Di Palma, Ronan Sauleau, Kien Pham, Laurent Dussopt, Erwan Fourn, Fatimata Diaby, Antonio Clemente, Laboratoire d'Electronique et des Technologies de l'Information ( CEA-LETI ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Grenoble Alpes [Saint Martin d'Hères], Université Grenoble Alpes ( UGA ), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), French National Research Agency (ANR), French National Research Agency (ANR) in the project labelled TRANSMIL (TRANSmitarray antenna at MILlimeter-wave), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: Materials science, discrete lens, Aperture, [ INFO.INFO-NI ] Computer Science [cs]/Networking and Internet Architecture [cs.NI], Phase (waves), chemistry.chemical_element, Dielectric, 02 engineering and technology, law.invention, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], flat lens arrays, law, 0202 electrical engineering, electronic engineering, information engineering, Ka band, Reconfigurable antenna, business.industry, 5G antennas, 020208 electrical & electronic engineering, PIN diode, 020206 networking & telecommunications, phase quantization, Hafnium, [SPI.TRON]Engineering Sciences [physics]/Electronics, [ SPI.TRON ] Engineering Sciences [physics]/Electronics, Electronically reconfigurable unit-cell, chemistry, Transmission (telecommunications), Optoelectronics, Transmitarray, reconfigurable antenna, business, linear polarization
Abstract: International audience; This paper presents in detail the design of a linearly polarized electronically reconfigurable unit-cell for transmitarray antennas with a 2-bit phase resolution in Ka-band. The size of the proposed unit-cell is 5.1x5.1x1.3 mm(3). It is implemented on a dielectric stack-up composed of six metal layers, three dielectric substrates and two bonding films. The radiating elements are printed on both external metallic layers and are loaded by two PIN diodes controlling the transmission phase. This unit-cell is used to design a 196-element transmitarray with 784 PIN diodes. The performance of this 2-bit transmitarray has been evaluated numerically using our in-house simulation tool and compared to a transmitarray with a 1-bit phase quantization. A maximum gain of 22.9 dBi, an aperture efficiency of 32.3%, and a side-lobe level equal to -18.1 dB at broadside have been obtained at 29 GHz.
Published: 2017

19. Primary Prevention of Asymptomatic Cardiovascular Disease Using Physiological Sensors Connected to an iOS App

Author: I. Ruiz, Isabel de la Torre Díez, Leire Moreno-Alsasua, Begonya Garcia-Zapirain, J. David Rodrigo-Carbonero, Sofiane Hamrioui, Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: Male, iOS, 020205 medical informatics, Heart disease, Medicine (miscellaneous), Primary detection, Blood Pressure, 02 engineering and technology, Disease, Body Temperature, 0302 clinical medicine, Health Information Management, Heart Rate, Risk Factors, 0202 electrical engineering, electronic engineering, information engineering, 030212 general & internal medicine, Oximetry, ComputingMilieux_MISCELLANEOUS, Cause of death, education.field_of_study, Mortality rate, Middle Aged, iHealth pulse oximeter, 3. Good health, Primary Prevention, Cardiovascular Diseases, Withings blood pressure monitor, Female, Smartphone, medicine.symptom, Information Systems, Adult, medicine.medical_specialty, [ INFO ] Computer Science [cs], Monitoring, Adolescent, Population, Health Informatics, Asymptomatic, 03 medical and health sciences, Young Adult, Heart rate, medicine, Humans, [INFO]Computer Science [cs], education, Exercise, business.industry, medicine.disease, Surgery, Diet, Blood pressure, Early Diagnosis, Emergency medicine, Remote Sensing Technology, business
Abstract: Cardiovascular disease is the first cause of death and disease and one of the leading causes of disability in developed countries. The prevalence of this disease is expected to increase in coming years although the death rate may be lower due to better treatment. To present the design and development of a technology solution for primary prevention of cardiovascular disease in asymptomatic patients. The system aims to raise the population’s awareness of the importance of adopting healthy heart habits by using self-feedback techniques. A series of sensors which makes it possible to detect cardiovascular risk factors in asymptomatic patients were used. These sensors enable evaluation of heart rate, blood pressure, SpO2 -oxygen saturation in blood- and body temperature. This work has developed a modular solution centred on four parts: iOS app, sensors, server and web. The CoreBluetooth library, which carries out Bluetooth 4.0 communication, was used for the connection between the app and the sensors. The data files are stored on the iPad and the server by using CoreData and SQL mechanisms. The system was validated with 20 healthy volunteers and 10 patients with established structural heart disease. Once the samples had been obtained, a comparison of all the significant data was run, in addition to a statistical analysis. The result of this calculation was a total of 32 cases of first level significance correlations (p
Published: 2017

20. A Greedy Heuristic Algorithm for Context-Aware User Association and Resource Allocation in Heterogeneous Wireless Networks

Author: Mohamad Zalghout, Ayman Khalil, Matthieu Crussiere, Jean-François Hélard, Samih Abdul-Nabi, Institut d'Électronique et des Technologies du numéRique (IETR), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Rennes 1 (UR1), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)
Subjects: Handover, Optimization problem, Computer science, Heuristic (computer science), [ INFO.INFO-NI ] Computer Science [cs]/Networking and Internet Architecture [cs.NI], user-centric, signal quality, 02 engineering and technology, User requirements document, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], 0203 mechanical engineering, 0202 electrical engineering, electronic engineering, information engineering, Wireless, Resource management, Greedy algorithm, Wireless network, business.industry, 020206 networking & telecommunications, 020302 automobile design & engineering, power consumption, [ SPI.TRON ] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics, blocking percentage, Resource allocation, business, Algorithm, Heterogeneous network
Abstract: International audience; Wireless heterogeneous networks are usually characterized by the integration of different types of radio access technologies (RATs) to enhance system capacity and meet user requirements. In this context, we formulate a user association and downlink resource allocation optimization problem to maximize the overall user-centric profit in the system. The context-awareness is based on the user preferences, the data rate requested by each user equipment (UE), and the RAT characteristics and constraints. The user preference is based on a normalized weighted profit function that considers both the received signal quality and the power consumption at UEs. To approximate the formulated optimization problem, a greedy heuristic algorithm with polynomial-time complexity is proposed. It is shown through persuasive simulations that the proposed heuristic algorithm, when compared to the trivial profit-function-based solution, enhances the average user satisfaction in the system and lowers the percentage of blocked data rate. In fact, the performance of the proposed heuristic algorithm comes close to the optimal solution while requesting a lower number of handovers (HOs).
Published: 2017

21. Distinction between Data Losses for Better Communications in IoT

Author: Sofiane Hamrioui, Pascal Lorenz, Camil Adam Mohamed Hamrioui, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Université de Haute-Alsace (UHA) Mulhouse - Colmar ( Université de Haute-Alsace (UHA) ), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Jonchère, Laurent
Subjects: Routing protocol, IoT, Computer science, Distributed computing, Reliability (computer networking), media_common.quotation_subject, [ INFO.INFO-NI ] Computer Science [cs]/Networking and Internet Architecture [cs.NI], Transport, QoS, 02 engineering and technology, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], 0502 economics and business, 0202 electrical engineering, electronic engineering, information engineering, Quality (business), media_common, Routing, Communication protocols, MAC, [INFO.INFO-NI] Computer Science [cs]/Networking and Internet Architecture [cs.NI], Network packet, Quality of service, 05 social sciences, 020206 networking & telecommunications, [SPI.TRON] Engineering Sciences [physics]/Electronics, [ SPI.TRON ] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics, 050211 marketing, Routing (electronic design automation), Communications protocol
Abstract: International audience; Our objective in this paper is to improve the communications performance for IoT applications by proposing a new solution called IC-IoT (Improving Communication for IoT). The principle used is the exploitation of three existing communication protocol by incorporating some mechanisms to consider the different parameters which can cause the data loses. A probabilistic approach is used to know the impact of every single parameter on the communication performance. The calculated probabilities are used by routing, transport and MAC protocols to adapt their functioning. IC-IoT leads to keep a better performance of quality of services (QoS) parameters and then provide favorable conditions for IoT applications. After the evaluation of its performance, the proposed solution improves the QoS parameters for the IoT applications. We are interesting mainly to the rate of packets delivery, the network lifetime and the evolution of the consumed energy.
Published: 2017

22. Broadband rectenna for ambient RF energy harvesting applications

Author: Mohamed Latrach, Jérôme Tissier, ESEO - RF-EMC ( RF-EMC ), ESEO-Tech, PRES Université Nantes Angers Le Mans ( UNAM ) -PRES Université Nantes Angers Le Mans ( UNAM ), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), ESEO - RF-EMC (RF-EMC), Université Bretagne Loire (UBL)-École supérieure d'électronique de l'ouest [Angers] (ESEO)-Université Bretagne Loire (UBL)-École supérieure d'électronique de l'ouest [Angers] (ESEO), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université Bretagne Loire (UBL)-Université Bretagne Loire (UBL), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Université de Nantes (UN)-Université de Rennes 1 (UR1)
Subjects: Spiral antenna, 010407 polymers, Materials science, business.industry, RF power amplifier, Electrical engineering, 020206 networking & telecommunications, 02 engineering and technology, 01 natural sciences, 7. Clean energy, [SPI.TRON]Engineering Sciences [physics]/Electronics, [ SPI.TRON ] Engineering Sciences [physics]/Electronics, 0104 chemical sciences, Rectifier, Rectenna, Balun, Broadband, 0202 electrical engineering, electronic engineering, information engineering, Radio frequency, Antenna (radio), business, Telecommunications, ComputingMilieux_MISCELLANEOUS
Abstract: In this paper, a broadband rectenna, for ambient RF energy harvesting applications, is presented. It is composed of a broadband spiral antenna with its balun, optimized to cover the principal frequency bands where there is RF energy to harvest (GSM900, GSM1800, UMTS2100 and WIFI). This antenna will be associated, in a first step, with a dual-band rectifier (GSM900-GSM1800) to do a complete rectenna. Source-pull simulations have been used to determine the optimal diode impedance giving the maximum conversion efficiency, in frequency bands of interest, for low input RF power levels. A broadband matching network has then been synthesized to ensure optimal operation of the rectifier in the GSM900 and GSM1800 bands.
Published: 2017

23. Nondiffracting waves: Criteria for designing X-wave launchers

Author: Walter Fuscaldo, Matteo Albani, Santi C. Pavone, Guido Valerio, Davide Comite, Mauro Ettorre, Alessandro Galli, Dipartimento di Ingegneria dell'Informazione, Elettronica e Telecomunicazioni [Roma] ( DIET ), Università degli Studi di Roma 'La Sapienza' [Rome], Dipartimento di Ingegneria dell'informazione e scienze matematiche [Siena] ( DIISM ), Università di siena 1240 [Siena], Laboratoire d'Electronique et Electromagnétisme ( L2E ), Université Pierre et Marie Curie - Paris 6 ( UPMC ), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Dipartimento di Ingegneria dell'Informazione, Elettronica e Telecomunicazioni [Roma] (DIET), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome], Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Dipartimento di Ingegneria dell'informazione e scienze matematiche [Siena] (DIISM), Università degli Studi di Siena = University of Siena (UNISI), Laboratoire d'Electronique et Electromagnétisme (L2E), Université Pierre et Marie Curie - Paris 6 (UPMC), Nantes Université (NU)-Université de Rennes 1 (UR1), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)
Subjects: Computer science, Acoustics, millimeter waves, nondiffracting waves, X-waves, 02 engineering and technology, 01 natural sciences, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Optics, 0103 physical sciences, Range (statistics), Dimensioning, 010302 applied physics, business.industry, Astrophysics::Instrumentation and Methods for Astrophysics, 021001 nanoscience & nanotechnology, Pulse (physics), [SPI.TRON]Engineering Sciences [physics]/Electronics, Transverse plane, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, Metric (mathematics), [ SPI.ELEC ] Engineering Sciences [physics]/Electromagnetism, X-wave, 0210 nano-technology, business, Microwave
Abstract: International audience; In this work, useful criteria for dimensioning X-wave launchers are provided based on the definition of an original metric of confinement. The mathematical expressions for evaluating the nondiffractive features of a spectrally-flat X-wave are first reviewed. Then, a novel criterion for dimensioning the aperture size of an X-wave launcher is proposed to obtain a pulse which is confined over both the transverse and the propagating axes. Such an analysis may be particularly useful for the development of X-wave launchers especially in the microwave/millimeter-wave range, where the available fractional bandwidths are subjected to severe technological constraints.
Published: 2017

24. A multifunction antenna with direct modulation and beam agility

Author: Samir Ouedraogo, Regis Guinvarc'h, Israel Hinostroza, Raphaël Gillard, Sondra, CentraleSupélec, Université Paris-Saclay (COmUE) (SONDRA), ONERA-CentraleSupélec-Université Paris Saclay (COmUE), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Laboratoire franco-singapourien de recherche en électromagnétisme et radars ( SONDRA ), ONERA-SUPELEC-National University of Singapore ( NUS ) -DSO National Laboratories-CentraleSupélec, Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: Super high frequency, Engineering, horn antenna, Directional antenna, business.industry, [ INFO.INFO-NI ] Computer Science [cs]/Networking and Internet Architecture [cs.NI], Electrical engineering, ComputerApplications_COMPUTERSINOTHERSYSTEMS, 020206 networking & telecommunications, Side looking airborne radar, Slot antenna, 02 engineering and technology, [ SPI.TRON ] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics, slotted waveguide, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Horn antenna, Radar engineering details, multifunction antenna, 0202 electrical engineering, electronic engineering, information engineering, ComputerSystemsOrganization_SPECIAL-PURPOSEANDAPPLICATION-BASEDSYSTEMS, 020201 artificial intelligence & image processing, Antenna (radio), business, Slotted waveguide
Abstract: International audience; An antenna system simultaneously providing a radar function and a secondary communication function with beam agility is proposed. The system is composed of a slotted waveguide (for the communication function) feeding a horn antenna (for the radar function). Direct modulation in four different directions can be obtained for communication provided each radiating slot is equipped with a simple switch. © 2017 IEEE.
Published: 2017

25. Green foams for microwave absorbing applications: Synthesis and characterization

Author: Ala Sharaiha, L. Le Gendre, Vincent Laur, Ratiba Benzerga, G. Lanoë, Ronan Lebullenger, Patrick Queffelec, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance ( Lab-STICC ), École Nationale d'Ingénieurs de Brest ( ENIB ) -Université de Bretagne Sud ( UBS ) -Université de Brest ( UBO ) -Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques ( IBNM ), Université de Brest ( UBO ) -Université européenne de Bretagne ( UEB ) -ENSTA Bretagne-Institut Mines-Télécom [Paris]-Centre National de la Recherche Scientifique ( CNRS ), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Institut des Sciences Chimiques de Rennes ( ISCR ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Ecole Nationale Supérieure de Chimie de Rennes-Institut National des Sciences Appliquées ( INSA ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes 1 (UR1), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Permittivity, Glass recycling, Materials science, chemistry.chemical_element, Inorganic compounds, Foaming agent, 02 engineering and technology, Dielectric, 7. Clean energy, 01 natural sciences, 0103 physical sciences, General Materials Science, Composite material, 010302 applied physics, Mechanical Engineering, Glasses, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, chemistry, Mechanics of Materials, Dielectric properties, Electromagnetic absorption, [ CHIM.MATE ] Chemical Sciences/Material chemistry, Electromagnetic shielding, Dielectric loss, 0210 nano-technology, Glass foams, Carbon, Microwave
Abstract: International audience; This study deals with the dielectric properties of recycled glass foams and their use as microwave absorbers. Glass wastes from Cathode Ray Tube have been used to produce foams by heating a mixture consisting of glass cullet and foaming agents (carbon or a combination of carbon, TiO2, MnO2 and AlN). As only part of the carbon introduced into the initial load oxidizes and contributes to the foaming process, the residual fraction acts as an electromagnetic absorber. The effect of the carbon load rate on the foams density and microwave properties was studied. These materials present a low permittivity and high dielectric losses in X-band. Foams density mainly controls the dielectric properties. Carbon-based glass foams show a great potential as microwave absorbers with a shielding effectiveness of 20 dB/cm at 12 GHz. Moreover, a tradeoff between the density and shielding efficiency can be achieved by controlling the load rate of carbon.
Published: 2017

26. Quantifying the Memory Effects of Power Amplifiers: EVM Closed-Form Derivations of Multicarrier Signals

Author: Yves Louet, Ali Cheaito, Jean-François Hélard, Matthieu Crussiere, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), SCN, Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes 1 (UR1), Signal, Communication et Electronique Embarquée (SCEE), Institut d'Electronique et de Télécommunications de Rennes (IETR), Centre National de la Recherche Scientifique (CNRS)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Université de Rennes (UNIV-RENNES), CominLabs, Nantes Université (NU)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Analytical expressions, business.industry, Computer science, Clipping (signal processing), Amplifier, power amplifier, 020206 networking & telecommunications, 020302 automobile design & engineering, 02 engineering and technology, Memory polynomial, memory effects, 0203 mechanical engineering, Control and Systems Engineering, 0202 electrical engineering, electronic engineering, information engineering, Baseband, EVM, Wireless, Electrical and Electronic Engineering, Telecommunications, business, Error vector magnitude, Algorithm, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract: International audience; This letter deals with the analysis of the memory effects of the Power Amplifier (PA) on multicarrier signals. We analytically derive the expressions of the Error Vector Magnitude (EVM) of amplified signals jointly considering a memory polynomial PA model and clipping effects. We provide analytical EVM expressions that depend on the PA coefficients, PA order, and memory depth as well as the clipping threshold of the input signal. These analytical expressions are new general formulas which allow to predict in-band distortions at the PA output.
Published: 2017

27. A Systematic Review of Security Mechanisms for Big Data in Health and New Alternatives for Hospitals

Author: Sofiane Hamrioui, Kashif Saleem, Begonya Garcia-Zapirain, Joel J. P. C. Rodrigues, Isabel de la Torre Díez, Institut d'Électronique et des Technologies du numéRique (IETR), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Simula Research Laboratory [Lysaker] (SRL), AAL-20125036, European Commission, Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), and Simula Research Laboratory [Lysaker] ( SRL )
Subjects: [ INFO ] Computer Science [cs], Computer Networks and Communications, business.industry, Computer science, lcsh:T, Big data, 020206 networking & telecommunications, Cloud computing, 02 engineering and technology, Data science, lcsh:Technology, lcsh:Telecommunication, lcsh:TK5101-6720, 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, [INFO]Computer Science [cs], Big data security, State (computer science), Electrical and Electronic Engineering, business, ComputingMilieux_MISCELLANEOUS, Information Systems
Abstract: Computer security is something that brings to mind the greatest developers and companies who wish to protect their data. Major steps forward are being taken via advances made in the security of technology. The main purpose of this paper is to provide a view of different mechanisms and algorithms used to ensure big data security and to theoretically put forward an improvement in the health-based environment using a proposed model as reference. A search was conducted for information from scientific databases as Google Scholar, IEEE Xplore, Science Direct, Web of Science, and Scopus to find information related to security in big data. The search criteria used were “big data”, “health”, “cloud”, and “security”, with dates being confined to the period from 2008 to the present time. After analyzing the different solutions, two security alternatives are proposed combining different techniques analyzed in the state of the art, with a view to providing existing information on the big data over cloud with maximum security in different hospitals located in the province of Valladolid, Spain. New mechanisms and algorithms help to create a more secure environment, although it is necessary to continue developing new and better ones to make things increasingly difficult for cybercriminals.
Published: 2017

28. Fundamental energetic limits of radio communication systems

Author: Jean-Yves Baudais, SCN, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Nantes Université (NU)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)
Subjects: Mathematical optimization, Information transmission, Computer science, General Engineering, Energy Engineering and Power Technology, 020206 networking & telecommunications, 02 engineering and technology, Energy consumption, Physics and Astronomy(all), Communications system, 020202 computer hardware & architecture, Zero (linguistics), 0202 electrical engineering, electronic engineering, information engineering, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Energy (signal processing), Communication channel
Abstract: International audience; The evaluation of the energy consumption of a radiocommunication requires to analyse the life cycle of the elements used. However, this analysis does not specify the energetic limits. Theoretical approaches allow one to draw these limits, which are known in multiple cases of information transmission. However, the answers are not always satisfactory, in particular in the case of time-varying channels. After a brief presentation of the notion of energetic limits of a radiocommunication, and beginning with a global approach, we show that, contrary to the published results, the energetic limits always differ from zero if the physical constraints are correctly expressed.
Published: 2017

29. EVM derivation of multicarrier signals to determine the operating point of the power amplifier considering clipping and predistortion

Author: Yves Louet, Jean-François Hélard, Ali Cheaito, Matthieu Crussiere, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), SCN, Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes 1 (UR1), Signal, Communication et Electronique Embarquée (SCEE), Institut d'Electronique et de Télécommunications de Rennes (IETR), Centre National de la Recherche Scientifique (CNRS)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Université de Rennes (UNIV-RENNES), CominLabs, Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Centre National de la Recherche Scientifique (CNRS), Nantes Université (NU)-Université de Rennes 1 (UR1), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: Computer Networks and Communications, Clipping (signal processing), Computer science, Orthogonal frequency-division multiplexing, 02 engineering and technology, PAPR, Predistortion, Distortion, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, OFDM, business.industry, Amplifier, 020208 electrical & electronic engineering, Clipping, Linearity, 020206 networking & telecommunications, Computer Science Applications, Power (physics), Signal Processing, EVM, Telecommunications, business, Electrical efficiency, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract: International audience; The high peak-to-average power ratio (PAPR) remains a major drawback of multicarrier modulations. Hence, the nonlinear characteristics of power amplifiers (PA) results in strong distortion and low power efficiency when multicarrier modulations are used. In this paper, the impact of the nonlinearities on the amplified multicarrier signal is analyzed, considering both PAPR limitation using clipping and PA linearization. Therefore, we derive the expression of the error vector magnitude (EVM) of the amplified signal with and without the use of polynomial predistortion and/or clipping techniques. We provide analytical EVM expressions that depend on the PA and predistortion characteristics, as well as the PAPR and the average power of both input and clipped signals. These expressions are general formulas which allow to measure in-band distortion at the PA output. The simulation results show that the proposed expressions present perfect accuracy. Moreover, the trade-off between the PA linearity and efficiency is investigated considering the performance of the clipping and predistortion techniques. An analytical expression which gives the optimal input back-off (IBO) maximizing the PA efficiency with respect to any EVM constraint is provided. Finally, the predistortion complexity is discussed aiming at reducing it with respect to an EVM constraint.
Published: 2016

30. Finite Blocklength Information Theory: What is the Practical Impact on Wireless Communications?

Author: Ayse Unsal, Jean-Marie Gorce, Philippe Mary, H. Vincent Poor, SCN, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Software and Cognitive radio for telecommunications (SOCRATE), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-CITI Centre of Innovation in Telecommunications and Integration of services (CITI), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA), Princeton University, ANR-16-CE25-0001,ARburst,Régions atteignables des communications sans fil multi-utilisateurs intermittentes(2016), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (NU)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), CITI Centre of Innovation in Telecommunications and Integration of services (CITI), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria), Université de Nantes (UN)-Université de Rennes 1 (UR1), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes 1 (UR1)
Subjects: 010505 oceanography, Computer science, Goodput, Transmitter, Code word, 020206 networking & telecommunications, Nakagami distribution, 02 engineering and technology, Code rate, Information theory, 01 natural sciences, symbols.namesake, Additive white Gaussian noise, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Channel state information, [INFO.INFO-IT]Computer Science [cs]/Information Theory [cs.IT], Statistics, 0202 electrical engineering, electronic engineering, information engineering, symbols, Fading, Algorithm, 0105 earth and related environmental sciences, Communication channel, Computer Science::Information Theory
Abstract: International audience; Recent advances in information theory have provided achievability bounds and converses for the coding rate for the finite blocklength regime. In this paper, recent results on the non-asymptotic coding rate for fading channels with no channel state information at the transmitter are exploited to analyze the goodput in additive white Gaussian noise (AWGN) and the energy-efficiency spectral-efficiency (EE-SE) tradeoff where the fundamental relationship between the codeword length and the EE is given. Finally, the true outage probability in Ricean and Nakagami-$m$ block fading channels is investigated and it is proved that the asymptotic outage capacity is the Laplace approximation of the average error probability in finite blocklength regime.
Published: 2016

31. Large Bandwidth Analysis in Multifunction Antenna for Radar and Communication Applications

Author: Israel Hinostroza, Samir Ouedraogo, Regis Guinvarc'h, Raphaël Gillard, Laboratoire franco-singapourien de recherche en électromagnétisme et radars ( SONDRA ), ONERA-SUPELEC-National University of Singapore ( NUS ) -DSO National Laboratories-CentraleSupélec, Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Sondra, CentraleSupélec, Université Paris-Saclay (COmUE) (SONDRA), ONERA-CentraleSupélec-Université Paris Saclay (COmUE), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: Imagination, Engineering, business.industry, media_common.quotation_subject, 020208 electrical & electronic engineering, Bandwidth (signal processing), Electrical engineering, 020206 networking & telecommunications, Slot antenna, 02 engineering and technology, law.invention, [SPI]Engineering Sciences [physics], [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, Horn antenna, law, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, [ SPI ] Engineering Sciences [physics], [ SPI.ELEC ] Engineering Sciences [physics]/Electromagnetism, Bandwidth analysis, Radar, business, Phase-shift keying, media_common, Slotted waveguide
Abstract: International audience; Large bandwidth analysis of the communication function for a single antenna system providing simultaneously radar and communication functions is studied. The system is composed of a slotted waveguide (for the communication function) feeding a horn antenna (for the radar function) so as to assign to each function different polarizations. Additionally, by switching between two slot arrays on the waveguide, a BPSK communication is achieved independently of the horn radiation
Published: 2016

32. MIMO-OFDM signal optimization for SAR imaging radar

Author: Eric Pottier, Jean-Yves Baudais, Stephane Meric, Vishal Riche, SCN, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Nantes Université (NU)-Université de Rennes 1 (UR1), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: Synthetic aperture radar, Computer science, Orthogonal frequency-division multiplexing, MIMO, 0211 other engineering and technologies, Data_CODINGANDINFORMATIONTHEORY, 02 engineering and technology, MIMO SAR, law.invention, Robustness (computer science), law, Radar imaging, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, ComputerSystemsOrganization_SPECIAL-PURPOSEANDAPPLICATION-BASEDSYSTEMS, Radar, SAR processing, Computer Science::Information Theory, 021101 geological & geomatics engineering, business.industry, 020206 networking & telecommunications, MIMO-OFDM, Image quality parameters, Continuous-wave radar, Range ambiguity, Genetic algorithm, OFDM signals, Telecommunications, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract: International audience; This paper investigates the optimization of the coded orthogonal frequency division multiplexing (OFDM) transmitted signal in a synthetic aperture radar (SAR) context. We propose to design OFDM signals to achieve range ambiguity mitigation. Indeed, range ambiguities are well known to be a limitation for SAR systems which operates with pulsed transmitted signal. The ambiguous reflected signal corresponding to one pulse is then detected when the radar has already transmitted the next pulse. In this paper, we demonstrate that the range ambiguity mitigation is possible by using orthogonal transmitted wave as OFDM pulses. The coded OFDM signal is optimized through genetic optimization procedures based on radar image quality parameters. Moreover, we propose to design a multiple-input multiple-output (MIMO) configuration to enhance the noise robustness of a radar system and this configuration is mainly efficient in the case of using orthogonal waves as OFDM pulses. The results we obtain show that OFDM signals outperform conventional radar chirps for range ambiguity suppression and for robustness enhancement in 2×2 MIMO configuration.
Published: 2016

33. Dynamic and Partial Reconfiguration Power Consumption Runtime Measurements Analysis for ZYNQ SoC Devices

Author: Mohamad Alfadl Rihani, Jean-Christophe Prévotet, Mohamad Mroue, Jordane Lorandel, Fabienne Nouvel, Yasser Mohanna, SCN, Institut d'Électronique et des Technologies du numéRique (IETR), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (NU)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Institut d'Electronique et de Télécommunications de Rennes (IETR), Centre National de la Recherche Scientifique (CNRS)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES), Faculty of Sciences [Lebanese University], Lebanese University [Beirut] (LU), Université de Nantes (UN)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Centre National de la Recherche Scientifique (CNRS), and Faculty of Sciences [Lebanese University] | Faculté des Sciences [Université Libanaise]
Subjects: business.industry, Computer science, Overhead (engineering), Process (computing), Automotive industry, Control reconfiguration, 020206 networking & telecommunications, 02 engineering and technology, 020202 computer hardware & architecture, [SPI.TRON]Engineering Sciences [physics]/Electronics, Idle, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Software, Embedded system, 0202 electrical engineering, electronic engineering, information engineering, System on a chip, business, Field-programmable gate array
Abstract: International audience; Field Programmable Gate Array (FPGA) architectures, such as Xilinx's Virtex-4 up to 7 series, have enabled partial and dynamic run-time self-reconfiguration for a long time. This feature enables the substitution of parts of a hardware design implemented on this re-configurable hardware, and therefore makes it possible for a system to adapt to the actual demands of applications. Dynamic Partial Reconfiguration (DPR) is an interesting technique that permits to share a part of the FPGA between different dedicated functions or hardware accelerators. Many domains may benefit from this technique including the Internet of Things (IoT), automotive industry, etc. However, many parameters, such as reconfiguration overhead, idle power consumption and performance trade-off', must be considered. In this paper, we provide a precise estimation of the power consumption when the DPR process is running in order to evaluate its influence on the performance of the global design. For this purpose, a Software/Hardware (SW/HW) system was implemented and the results were extracted in real-time using Zynq System on Chip SoC devices.
Published: 2016

34. Field-to-long-segmented-trace coupling with arbitrary loads and a transparent upper bound using a single modified taylor cell

Author: M'Hamed Drissi, Mohamed Ramdani, Frank Leferink, Sjoerd Op 't Land, Richard Perdriau, ESEO-EMC, ESEO-Tech, PRES Université Nantes Angers Le Mans ( UNAM ) -PRES Université Nantes Angers Le Mans ( UNAM ), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Telecommunication Engineering [TE], University of Twente [Netherlands], SEISME (Aerospace Valley), Université Bretagne Loire (UBL)-Université Bretagne Loire (UBL), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), French National Project SEISME, Nantes Université (NU)-Université de Rennes 1 (UR1), Université Bretagne Loire (UBL)-École supérieure d'électronique de l'ouest [Angers] (ESEO)-Université Bretagne Loire (UBL)-École supérieure d'électronique de l'ouest [Angers] (ESEO), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and University of Twente
Subjects: Engineering, Plane wave, closed-form solution, 02 engineering and technology, Microstrip, Printed circuit board, GTEM cell, Transmission line, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Electrical and Electronic Engineering, METIS-318479, Electrical impedance, Coupling, business.industry, field-to-trace coupling, Mathematical analysis, EWI-27114, 020206 networking & telecommunications, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, [SPI.TRON]Engineering Sciences [physics]/Electronics, [ SPI.TRON ] Engineering Sciences [physics]/Electronics, full-wave simulation, Terminal (electronics), modified Taylor model, IR-101017, business, Voltage
Abstract: International audience; In modern electronic products, the printed circuit board (PCB) traces may well form the dominant coupling path in radiated immunity problems. Therefore, an understanding of the designable parameters that influence the worst-case induced voltages can be of use to the PCB designer, together with rapid simulations. Therefore, a modified single (unmeshed) Taylor cell is combined with transmission line theory to predict the terminal voltages induced by a grazing, vertically polarized plane wave, incident on a multi-segment trace with arbitrary terminal impedances. The resulting model is closed-form and therefore suitable for rapid simulations. Furthermore, the model is geometrically approximated to provide understanding on how designable PCB parameters determine the worst-case induced voltage. Finally, the model is compared to measurement results.
Published: 2016

35. Energy efficient resource allocation for quantity of information delivery in parallel channels

Author: Andrea M. Tonello, Abdallah Hamini, Jean-Yves Baudais, SCN, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Alpen-Adria-Universität Klagenfurt [Klagenfurt, Austria], Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Nantes Université (NU)-Université de Rennes 1 (UR1), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: Mathematical optimization, Computer science, Bandwidth (signal processing), 020206 networking & telecommunications, 02 engineering and technology, Energy consumption, Information delivery, 01 natural sciences, Multi-objective optimization, Energy efficient resource allocation, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Electrical and Electronic Engineering, Transmission time, 010306 general physics, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Efficient energy use, Channel occupancy
Abstract: This paper deals with the problem of minimizing the energy required to transmit a certain amount of information bits. If there is no constraint, in a Gaussian channel, the solution leads us to the use an infinite transmission time or an infinite bandwidth. In particular, the minimum required signal-to-noise ratio to transmit one bit is equal to 1:59 dB. To allow the development of new green communication services, a finite bandwidth and a finite time have to be used in practice. Thus, we focus on the transmission of a given number of bits over a set of parallel Gaussian channels when there is an energy constraint and we have the goal of minimizing either the highest transmission time (among the channels) or the average channel occupancy time. This is a resource allocation problem that is formulated by targeting a certain energy consumption factor, herein defined as the ratio between the energy required in the asymptotic regime and the energy required to transmit a certain quantity of information with limited (time, bandwidth) resources. The Pareto front for the joint optimization of the maximum transmission time and the average channel occupancy time is also derived. Several explicative numerical results of the derived resource allocation algorithms for energy efficient communications are also reported. Copyright © 0000 John Wiley & Sons, Ltd.
Published: 2016

36. Energy efficiency-area spectral efficiency tradeoff in PPP network with SLNR precoder

Author: Xavier Lagrange, Philippe Mary, Jean-Yves Baudais, Ahmad Mahbubul Alam, Institut d'Électronique et des Technologies du numéRique (IETR), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), SCN, Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (NU)-Université de Rennes 1 (UR1), Advanced technologies for operated networks (ADOPNET), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Télécom Bretagne-RÉSEAUX, TÉLÉCOMMUNICATION ET SERVICES (IRISA-D2), Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), CentraleSupélec-Télécom Bretagne-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de Recherche en Informatique et en Automatique (Inria)-École normale supérieure - Rennes (ENS Rennes)-Université de Bretagne Sud (UBS)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Télécom Bretagne-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Institut National de Recherche en Informatique et en Automatique (Inria)-École normale supérieure - Rennes (ENS Rennes)-Université de Bretagne Sud (UBS)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Département Réseaux, Sécurité et Multimédia (RSM), Université européenne de Bretagne - European University of Brittany (UEB)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT), This work has received a French government support granted to the CominLabs excellence laboratory and managed by the National Research Agency in the \textquotedblleft Investing for the Future' program under reference No. ANR-10-LABX-07-01., ANR-10-LABX-0007,COMIN Labs,Digital Communication and Information Sciences for the Future Internet(2010), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Université de Rennes (UR)-Télécom Bretagne-RÉSEAUX, TÉLÉCOMMUNICATION ET SERVICES (IRISA-D2), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-Télécom Bretagne-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-Télécom Bretagne-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-Télécom Bretagne-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-Télécom Bretagne-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-Télécom Bretagne-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-Télécom Bretagne-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-Télécom Bretagne-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Bretagne Sud (UBS)-École normale supérieure - Rennes (ENS Rennes)-Institut National de Recherche en Informatique et en Automatique (Inria)-Télécom Bretagne-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)
Subjects: Signal-to-leakage-and-noise ratio (SLNR), Mathematical optimization, multiple-input multiple-output (MIMO), Wireless network, 05 social sciences, MIMO, 050801 communication & media studies, 020206 networking & telecommunications, 02 engineering and technology, Spectral efficiency, Precoding, energy efficiency-area spectral efficiency (EE-ASE), precoder, [SPI]Engineering Sciences [physics], Base station, 0508 media and communications, Control theory, Poisson point process, 0202 electrical engineering, electronic engineering, information engineering, Cellular network, [INFO]Computer Science [cs], Poisson point process (PPP), Rayleigh quotient, Computer Science::Information Theory, Mathematics
Abstract: International audience; Signal-to-leakage-and-noise ratio (SLNR) is a pro\-mising criterion for linear precoder design in multiuser multiple-input multiple-output systems. In this paper, an expression of a precoder maximizing the SLNR based on the generalized Rayleigh quotient theorem is derived for cellular networks. Compared with the conventional SLNR precoders, we consider the non-homogeneous average received signal-to-noise ratio (SNR) condition due to the random network geometry and the leakage to other cells. We aim at characterizing the energy efficiency-area spectral efficiency (EE-ASE) region for a Poisson point process (PPP) network using this precoder for different base station (BS) densities and number of BS antennas when static power consumption is considered. Simulation results demonstrate the superiority of the SLNR precoder over zero-forcing (ZF) precoder in terms of EE-ASE tradeoff. Our contribution lies in the analysis of the performance of SLNR precoder in PPP networks in terms of tradeoff between EE and SE, and in the comparison between the well known ZF precoder and SLNR precoder, when static power consumption is considered.
Published: 2016

37. Optimal Operating Point of the Power Amplifier with respect to the EVM for TV BroadcastingApplications

Author: Yves Louet, Jean-François Hélard, Matthieu Crussiere, Ali Cheaito, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), SCN, Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes 1 (UR1), Nantes Université (NU)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes)
Subjects: Operating point, Power-added efficiency, business.industry, Clipping (signal processing), Computer science, Amplifier, 05 social sciences, 050801 communication & media studies, 020206 networking & telecommunications, 02 engineering and technology, Predistortion, 0508 media and communications, OFDM, digital predistortion, PAPR, EVM, Digital Video Broadcasting, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Linear amplifier, Telecommunications, business, Electrical efficiency, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract: 4 pages; International audience; "The high Power Amplifier (PA) dominates the powerconsumption in DVB transceiver systems and requests focusingthe power efficiency improvements on this device; especially whenmulti-carrier modulations are used which is characterized byhigh Peak-to-Average Power Ratio (PAPR). In this paper, first,we provide analytical expression of the Error Vector Magnitude(EVM) of the amplified signal when polynomial predistortionand clipping techniques are activated. Secondly, a theoreticalanalysis of the trade-off between the power amplifier linearityand efficiency is investigated considering the performance of theclipping and predistortion techniques. Therefore, an analyticalexpression which gives the optimal Input Back-Off (IBO) maximizingthe PA efficiency, with respect to an EVM constraint,is provided. It is demonstrated that significant power efficiencyimprovement can be achieved using our analytical expressions"
Published: 2016

38. A New Evaluation Criteria for Learning Capability in OSA Context

Author: Navikkumar Modi, Philippe Mary, Jacques Palicot, Christophe Moy, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Signal, Communication et Electronique Embarquée (SCEE), Institut d'Electronique et de Télécommunications de Rennes (IETR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Centre National de la Recherche Scientifique (CNRS), SCN, Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), This work has received a French government support granted to the CominLabs excellence laboratory and managed by the National Research Agency in the 'Investing for the Future' program under reference No. ANR-10-LABX-07-01, TEPN, ANR-10-LABX-0007,COMIN Labs,Digital Communication and Information Sciences for the Future Internet(2010), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Université de Rennes (UNIV-RENNES), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Nantes (UN)-Université de Rennes 1 (UR1), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes 1 (UR1)
Subjects: Engineering, Multi-armed Bandit, 050801 communication & media studies, Context (language use), 02 engineering and technology, Machine learning, computer.software_genre, Multi-armed bandit, Optimal Arm Identification (OI) factor, [SPI]Engineering Sciences [physics], 0508 media and communications, 0202 electrical engineering, electronic engineering, information engineering, Reinforcement learning, [INFO]Computer Science [cs], Set (psychology), Selection (genetic algorithm), Opportunistic Spectrum Access, business.industry, 05 social sciences, 020206 networking & telecommunications, Cognitive Radio, Reinforcement Learning, Identification (information), Lempel-Ziv (LZ) Complexity, Cognitive radio, Artificial intelligence, business, computer, Communication channel
Abstract: International audience; The activity pattern of different primary users (PUs) in the spectrum bands has a severe effect on the ability of the multi-armed bandit (MAB) policies to exploit spectrum opportunities. In order to apply MAB paradigm to opportunistic spectrum access (OSA), we must find out first whether the target channel set contains sufficient structure, over an appropriate time scale, to be identified by MAB policies. In this paper, we propose a criteria for analyzing suitability of MAB learning policies for OSA scenario. We propose a new criteria to evaluate the structure of random samples measured over time and referred as Optimal Arm Identification (OI) factor. OI factor refers to the difficulty associated with the identification of the optimal channel for opportunistic access. We found in particular that the ability of a secondary user to learn the activity of PUs spectrum is highly correlated to the OI factor but not really to the well known LZ complexity measure. Moreover, in case of very high OI factor, MAB policies achieve very little percentage of improvement compared to random channel selection (RCS) approach.
Published: 2016

39. FastImmunity: An EDA extension for PCB immunity prediction

Author: Sjoerd Op 't Land, Ala Ayed, Richard Perdriau, Mohamed Ramdani, ESEO-EMC, ESEO-Tech, Université Bretagne Loire (UBL)-École supérieure d'électronique de l'ouest [Angers] (ESEO)-Université Bretagne Loire (UBL)-École supérieure d'électronique de l'ouest [Angers] (ESEO), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), PRES Université Nantes Angers Le Mans ( UNAM ) -PRES Université Nantes Angers Le Mans ( UNAM ), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Université Bretagne Loire (UBL)-Université Bretagne Loire (UBL), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: Electromagnetic field, Printed circuit boards, Engineering, Design, Electronic design automation, EDA extension, [ INFO.INFO-NI ] Computer Science [cs]/Networking and Internet Architecture [cs.NI], Electromagnetic pulse, 02 engineering and technology, Hardware_PERFORMANCEANDRELIABILITY, Design phase, computer.software_genre, Altium Designer, Electromagnetic interference, Printed circuit board, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], PCB designers, Polychlorinated biphenyls, EMI, Prediction model, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Hardware_INTEGRATEDCIRCUITS, Computer Aided Design, Radiated electromagnetic interferences, Computer aided design, business.industry, Electromagnetic compatibility, 020206 networking & telecommunications, Electromagnetic fields, Printed circuit board (PCBs), [ SPI.TRON ] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics, Printed circuits, business, computer, Forecasting
Abstract: International audience; Predicting the immunity of printed circuit boards (PCBs) to radiated electromagnetic interference (EMI) requires the computation of the electromagnetic field's coupling to PCB traces. A modified Taylor-based analytical model exists developed and validated for PCB's immunity prediction. In this paper, we present the methodology of development of an electronic design automation (EDA) extension for Altium Designer based on the prediction model. The developed extension allows PCB designers to have further insight on PCBs immunity during design phase and implements a unique electromagnetic compatibility (EMC) feature compared to existing EMC tools. © 2016 IEEE.
Published: 2016

40. Blind repetitions for cellular-IoT: Performance analysis of combination mechanisms

Author: Ming Liu, Jean Schwoerer, Louis-Adrien Dufrene, Jean-François Hélard, Matthieu Crussiere, Orange Labs [Meylan], Orange Labs, SCN, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Nantes Université (NU)-Université de Rennes 1 (UR1), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: 010302 applied physics, Scheme (programming language), business.industry, Computer science, 020208 electrical & electronic engineering, 02 engineering and technology, 01 natural sciences, [SPI.TRON]Engineering Sciences [physics]/Electronics, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], GSM, PHY, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Service data point, Mobile telephony, Enhanced Data Rates for GSM Evolution, business, Adaptation (computer science), computer, Computer network, computer.programming_language
Abstract: International audience; As evident from the increasing number of technical studies on machine type communications, Internet of Things (IoT) has become a hot topic. Among all the initiatives attempting to build end-to-end connectivity solutions, the 3rd Generation Partnership Project (3GPP) is actively working on the integration of IoT features into the existing 2G and 4G network specifications. In the framework of the adaptation of the GSM (Global System for Mobile communication) and EDGE (Enhanced Data rates for GSM Evolution) systems to IoT applications, several solutions have been proposed at the PHY/ MAC level, all sharing a common trait: enhancing the coverage using blind repetition mechanisms. The question of how to recombine the repeated symbols at the receiver side has then to be raised. In this work, we analyze the performance of state-of-the-art combination approaches that are carried out at different levels of a classic GSM receiver and we propose a new combination scheme. To mitigate the drawbacks of each individual solution, two hybrid strategies are proposed involving these different levels of combination. Performance comparison is led for the different cases considering constant as well as time variant channels, leading to a discussion about the most efficient strategy to follow, depending on the targeted application. To the best of our knowledge, this is the first work dealing with the comparison of combination mechanisms including hybrid combining solutions.
Published: 2016

41. Antenna system for simultaneous radar and communication applications

Author: Israel Hinostroza, Samir Ouedraogo, Regis Guinvarc'h, Raphaël Gillard, Laboratoire franco-singapourien de recherche en électromagnétisme et radars ( SONDRA ), ONERA-SUPELEC-National University of Singapore ( NUS ) -DSO National Laboratories-CentraleSupélec, Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Sondra, CentraleSupélec, Université Paris-Saclay (COmUE) (SONDRA), ONERA-CentraleSupélec-Université Paris Saclay (COmUE), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: Antenna system, Horn antennas, Computer science, [ INFO.INFO-NI ] Computer Science [cs]/Networking and Internet Architecture [cs.NI], Physics::Optics, Slot antenna, 02 engineering and technology, 01 natural sciences, 010305 fluids & plasmas, Radiation pattern, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], 0103 physical sciences, Radar antennas, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Communication application, Antenna feed, Slotted waveguides, Computer Science::Information Theory, Beam waveguide antenna, Radar, Antenna measurement, 020206 networking & telecommunications, Antenna efficiency, [SPI.TRON]Engineering Sciences [physics]/Electronics, [ SPI.TRON ] Engineering Sciences [physics]/Electronics, Horn antenna, Rectangular waveguides, Multifunction antenna, Slot antennas, Antennas, Waveguides, Slotted waveguide
Abstract: International audience; An antenna system composed of horn antenna and slotted waveguide is proposed. Slotted waveguide radiation can be controlled independently from the horn radiation to perform a BPSK communication by switching between the slots on the waveguide. The horn radiation is used for the main radar function. Then, the antenna system provides two different functions, each of them using a different polarization. © 2016 European Association of Antennas and Propagation.
Published: 2016

42. Higher-Order Leaky-Mode Bessel-Beam Launcher

Author: Alessandro Galli, Anthony Grbic, Ronan Sauleau, Guido Valerio, Walter Fuscaldo, Mauro Ettorre, Institut d'Electronique et de Télécommunications de Rennes (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC), Dipartimento di Ingegneria dell'Informazione, Elettronica e Telecomunicazioni [Roma] (DIET), Università degli Studi di Roma 'La Sapienza' [Rome], ANR-14-CE26-0030-01, WIREFREE, ANR-14-CE26-0030,WIREFREE,Systèmes de transmission d’énergie sans fils contrôlée et confinée pour les équipements électroniques(2014), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), ANR-14-CE26-0030,WIREFREE,Systèmes de transmission d'énergie sans fils contrôlée et confinée pour les équipements électroniques(2014), Nantes Université (NU)-Université de Rennes 1 (UR1), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome], Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Université Pierre et Marie Curie - Paris 6 ( UPMC ), Dipartimento di Ingegneria dell'Informazione, Elettronica e Telecomunicazioni [Roma] ( DIET ), and ANR-14-CE26-0030-01, WIREFREE)
Subjects: Bessel-beam launcher, higher-order leaky-wave mode, [ INFO.INFO-NI ] Computer Science [cs]/Networking and Internet Architecture [cs.NI], Capacitive sensing, 02 engineering and technology, Bessel beams, 7. Clean energy, 01 natural sciences, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], transverse-magnetic, 0202 electrical engineering, electronic engineering, information engineering, leaky waves, zeroth-order Bessel function, propagating Bessel beam, near-field focusing, Leaky mode, Physics, Impedance, dispersion analysis, Dispersion, artificial surface, millimeter waves, electric field, artificial sur- face, Bessel beam, symbols, electrical and electronic engineering, condensed matter physics, near-field measurements, capacitive sheet, electromagnetic launchers, Dielectric, Approximation methods, Index Terms-Bessel beams, symbols.namesake, Optics, Bandwidth, Apertures, Electric field, leaky radial waveguide, 0103 physical sciences, Prototypes, Electrical and Electronic Engineering, 010306 general physics, Electrical impedance, Ground plane, operating bandwidth, business.industry, 020206 networking & telecommunications, [ SPI.TRON ] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics, higher-order leaky modes, high-order modes, frequency 38 GHz to 39.5 GHz, millimetre wave propagation, business, Bessel function
Abstract: We present a Bessel-beam launcher based on a leaky radial waveguide consisting of a capacitive sheet over a ground plane that supports higher-order leaky modes. A propagating Bessel beam is generated above the radiating waveguide. The Bessel beam is transverse-magnetic (TM) polarized with a vertical component of electric field that is a zeroth-order Bessel function of the first kind. A higher-order leaky-wave mode is used to reduce losses at millimeter waves and, at the same time, avoid the thin dielectric layers used in previously proposed lower order leaky-wave Bessel launchers. Closed-form design equations are provided for the proposed structure. In addition, the operating bandwidth of the launcher is defined using dispersion analysis. Near-field measurements of a prototype operating in the frequency range 38–39.5 GHz validate the concept. The measured launcher generates a Bessel beam with a stable spot size of about 4.3 mm ( $0.57\,\lambda$ ) over a nondiffractive range of about 16.4 mm ( $2.2\,\lambda$ ), within about a 4% fractional bandwidth.
Published: 2016

43. Saddle point MPC approach to nonlinear robust sampled-data control problem

Author: Maxime Penet, Aziz Belmiloudi, Hervé Guéguen, Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), CentraleSupélec, Institut National des Sciences Appliquées - Rennes ( INSA Rennes ), Institut de Recherche Mathématique de Rennes ( IRMAR ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -AGROCAMPUS OUEST-École normale supérieure - Rennes ( ENS Rennes ) -Institut National de Recherche en Informatique et en Automatique ( Inria ) -Institut National des Sciences Appliquées ( INSA ) -Université de Rennes 2 ( UR2 ), Université de Rennes ( UNIV-RENNES ) -Centre National de la Recherche Scientifique ( CNRS ), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA), Institut de Recherche Mathématique de Rennes (IRMAR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École normale supérieure - Rennes (ENS Rennes)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-INSTITUT AGRO Agrocampus Ouest, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES), AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Université de Rennes 2 (UR2), Université de Rennes (UNIV-RENNES)-École normale supérieure - Rennes (ENS Rennes)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), and Université de Nantes (UN)-Université de Rennes 1 (UR1)
Subjects: adjoint model, saddle point, 0209 industrial biotechnology, 020208 electrical & electronic engineering, Sampling (statistics), 02 engineering and technology, [ MATH.MATH-NA ] Mathematics [math]/Numerical Analysis [math.NA], open-loop sampled-data, NMPC, Computer Science Applications, Model predictive control, Nonlinear system, 020901 industrial engineering & automation, Exponential stability, Control and Systems Engineering, Control theory, Saddle point, Bounded function, 0202 electrical engineering, electronic engineering, information engineering, Robust control, [MATH.MATH-NA]Mathematics [math]/Numerical Analysis [math.NA], robust control, Mathematics
Abstract: International audience; This paper presents a robust nonlinear model predictive control strategy to consider the control of systems described by nonlinear ordinary differential equation in a sampled-data framework. The optimal couple controldisturbances is calculated as a time continuous function at each sampling instant by solving a saddle point problem. Using this controller, it is proved that the system is ultimately bounded and satisfies an exponential stability property at each sampling instants. To validate the efficiency of our approach, the presented methodology is illustrated on a cart, spring and damper example.
Published: 2016

44. Analytical Derivation and Optimization of a Hybrid Unicast-Broadcast Network for Linear Services

Author: Pape Abdoulaye Fam, Matthieu Crussiere, Pierre Bretillon, Stephane Paquelet, Jean-François Hélard, Domaine Network (IRT b<>com) (Network), Institut de Recherche Technologique b-com (IRT b-com), TéléDiffusion de France (TDF), Groupe TDF, Institut d'Électronique et des Technologies du numéRique (IETR), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), SCN, Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Nantes (UN)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes)
Subjects: Service (systems architecture), business.industry, Computer science, Quality of service, Mobile computing, 020206 networking & telecommunications, 02 engineering and technology, Network simulation, [SPI.TRON]Engineering Sciences [physics]/Electronics, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Convex optimization, 0202 electrical engineering, electronic engineering, information engineering, Media Technology, 020201 artificial intelligence & image processing, Digital television, Mobile telephony, Electrical and Electronic Engineering, Unicast, delivery, business, Computer network
Abstract: International audience; This paper provides a theoretical analysis of the performance of an hybrid network composed of a broadband system and a broadcast system which cooperate to deliver linear services on portable and mobile devices. First, we propose a global system model for the hybrid network in which the coverage area of the broadcast system is adjusted with respect to the spatial distribution of the users. Then based on the number of users requesting the services, the model parameters are optimized to increase the capacity of the hybrid network while guaranteeing a given quality of service. By applying convex optimization techniques, we derive a closed-form expression of the optimal coverage radius of the broadcast system that maximizes the capacity of the hybrid network. Next, based on this theoretical model, we analyze the performances of the optimized hybrid network. The results show that, depending on the number of users requesting the service, significant improvements of the capacity and quality of service are achieved with the hybrid network. Finally, regarding the planning of a cooperative network, this paper can be used to determine the optimal planning parameters of the broadcasting system for the delivery of linear services.
Published: 2016

45. Design of a Wideband Multiplexer for Direct Power Injection on Non-DC Functional Signals

Author: Richard Perdriaus, Mohamed Ramdani, M'Hamed Drissi, Mohamed Amellal, Sjoerd Op 't Land, Ali Ahaitouf, ESEO-EMC, ESEO-Tech, Université Bretagne Loire (UBL)-Université Bretagne Loire (UBL), Institut d'Électronique et des Technologies du numéRique (IETR), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Laboratoire Signaux Systèmes et Composants (LSSC), Faculté des sciences (Fès), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université Bretagne Loire (UBL)-École supérieure d'électronique de l'ouest [Angers] (ESEO)-Université Bretagne Loire (UBL)-École supérieure d'électronique de l'ouest [Angers] (ESEO), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), PRES Université Nantes Angers Le Mans ( UNAM ) -PRES Université Nantes Angers Le Mans ( UNAM ), Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Signaux Systèmes et Composants ( LSSC ), and Faculte des Sciences et Techniques de Fès
Subjects: Physics, Discrete mathematics, business.industry, Bandwidth (signal processing), Electrical engineering, 020206 networking & telecommunications, 02 engineering and technology, Condensed Matter Physics, Multiplexing, Multiplexer, Atomic and Molecular Physics, and Optics, Cutoff frequency, Computer Science::Hardware Architecture, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, 020210 optoelectronics & photonics, [ SPI.ELEC ] Engineering Sciences [physics]/Electromagnetism, 0202 electrical engineering, electronic engineering, information engineering, Baseband, Radio frequency, Electrical and Electronic Engineering, Wideband, business, Electrical impedance, ComputingMilieux_MISCELLANEOUS
Abstract: This letter describes the design and implementation of a wideband radio frequency-baseband multiplexer. This device makes it possible to superimpose radio frequency noise to a functional baseband signal with controlled and repeatable transfer characteristics. The baseband path has a measured dc—380 $\mathrm{M}$ $\mathrm{Hz}$ bandwidth, while the radio frequency path (up to 1 $\mathrm{W}$ ) has a 150 $\mathrm{k}$ $\mathrm{Hz}$ $\text{-}$ 5 $\mathrm{G}$ $\mathrm{Hz}$ bandwidth. This multiplexer can be used for electromagnetic conducted immunity testing of digital and mixed-signal devices.
Published: 2015

46. Alien crosstalk elimination in digital subscriber line systems

Author: Maryline Helard, Jérôme Le Masson, Ahmad Al Amayreh, Meryem Ouzzif, The University of Jordan (JU), Lab-STICC_UBS_CACS_IAS, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche des Ecoles de St-Cyr Coëtquidan (CREC), Ecoles de St-Cyr Coëtquidan, Orange Labs [Cesson-Sévigné], Orange Labs, SCN, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Nantes Université (NU)-Université de Rennes 1 (UR1), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: Computer science, business.industry, Filtering theory, 020206 networking & telecommunications, 02 engineering and technology, Computer Science Applications, Crosstalk, Digital subscriber line, [INFO.INFO-IT]Computer Science [cs]/Information Theory [cs.IT], 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, 020201 artificial intelligence & image processing, Electrical and Electronic Engineering, Telecommunications, business, ComputingMilieux_MISCELLANEOUS
Abstract: Elimination of alien crosstalk in coordinated digital subscriber line systems is investigated in this study. In the upstream, the process of crosstalk elimination may take advantage of available coordination at the receiver side. As the signal received at the coordinated terminals can be corrupted by alien crosstalk, the reception process involves passing the signals received at the coordinated terminals through a spatial whitening operation. As part of the contribution in this study, a method is proposed to obtain the spatial whitening filter coefficients. These coefficients are estimated from the cyclic spectrum of alien crosstalk received at the coordinated system terminals, where transmission at the coordinated system is controlled to allow separating the cyclic spectra of both coordinated system and alien crosstalk signals. This study includes evaluation of the whitening receiver performance taking into account the effects of estimation errors. Theoretical derivations are illustrated by numerical results obtained for VDSL2 application.
Published: 2014

47. A unified broadcast layer for horizon 2020 delivery of multimedia services

Author: Benjamin Ros, Marie Le Bot, Arnaud Bouttier, Matthieu Crussiere, Christian Gallard, Alain Untersee, Catherine Douillard, Institut d'Électronique et des Technologies du numéRique (IETR), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Lab-STICC_TB_CACS_IAS, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Département Electronique (ELEC), Université européenne de Bretagne - European University of Brittany (UEB)-Institut Mines-Télécom [Paris] (IMT)-Télécom Bretagne, Orange Labs - Cesson-Sévigné (Orange), Centre National d'Études Spatiales [Toulouse] (CNES), Mitsubishi Electric R&D Centre Europe (Entreprise) (MERCE), Teamcast, Institut d'Electronique et de Télécommunications de Rennes ( IETR ), Université de Nantes ( UN ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -CentraleSupélec-Centre National de la Recherche Scientifique ( CNRS ), Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance ( Lab-STICC ), École Nationale d'Ingénieurs de Brest ( ENIB ) -Université de Bretagne Sud ( UBS ) -Université de Brest ( UBO ) -Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques ( IBNM ), Université de Brest ( UBO ) -Université européenne de Bretagne ( UEB ) -ENSTA Bretagne-Institut Mines-Télécom [Paris]-Centre National de la Recherche Scientifique ( CNRS ) -École Nationale d'Ingénieurs de Brest ( ENIB ) -Université de Bretagne Sud ( UBS ) -Université de Brest ( UBO ) -Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques ( IBNM ), Université de Brest ( UBO ) -Université européenne de Bretagne ( UEB ) -ENSTA Bretagne-Institut Mines-Télécom [Paris]-Centre National de la Recherche Scientifique ( CNRS ), Département Electronique ( ELEC ), Université européenne de Bretagne ( UEB ) -Télécom Bretagne-Institut Mines-Télécom [Paris], Centre National d'Etudes Spatiales ( CNES ), Mitsubishi Electric R&D Centre Europe (Entreprise) ( MERCE ), Teamcast (Entreprise), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université européenne de Bretagne - European University of Brittany (UEB)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Télécom Bretagne-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Université européenne de Bretagne - European University of Brittany (UEB)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT), and Université de Nantes (UN)-Université de Rennes 1 (UR1)
Subjects: Broadband networks, Computer science, Context (language use), 02 engineering and technology, [ SPI.SIGNAL ] Engineering Sciences [physics]/Signal and Image processing, Terrestrial channels, 3GPP LTE/E-MBMS, 0203 mechanical engineering, Digital Video Broadcasting, 0202 electrical engineering, electronic engineering, information engineering, Media Technology, Electrical and Electronic Engineering, Layer (object-oriented design), DVB-T2, business.industry, Hardware demonstrator, Mobile broadband, Physical layer, [INFO.INFO-MM]Computer Science [cs]/Multimedia [cs.MM], 020206 networking & telecommunications, 020302 automobile design & engineering, Access network cooperation, Common physical layer, [ SPI.TRON ] Engineering Sciences [physics]/Electronics, Satellite channels, Mobile telephony, Broadcast networks, business, Mobile device, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Computer network
Abstract: International audience; It is expected that, in the coming years, the video data traffic carried by mobile networks will increase drastically. Among the different ways of facing this "mobile data tsunami", the cooperation of several complementary access technologies offers promising prospects. In the context of such a cooperative approach, this paper proposes the definition of a unified broadcast layer, close to the 3GPP-LTE technology, and therefore liable to be easily integrated in mobile devices and infrastructure equipment. The general technical requirements for the design of such a common physical layer are detailed and a practical example based on the 3GPP/LTE-E-MBMS and DVB-T2 standards is described. The verification of the proposed approach is performed through simulation results and validation tests carried out on a hardware platform.
Published: 2014

48. Microcrystalline silicon gauges on flexible substrates for high deformations with high spatial resolution

Author: Yannick Kervran, Nathalie Coulon, O. De Sagazan, Tayeb Mohammed-Brahim, J. P. Gauthier, Sabri Janfaoui, Samuel Crand, Dispositifs Electronique (DE), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Nantes Université (NU)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Silicon, High Energy Physics::Lattice, chemistry.chemical_element, 02 engineering and technology, 01 natural sciences, Radius of curvature (optics), High Energy Physics::Theory, resistor, Microcrystalline silicon, 0103 physical sciences, Electronic engineering, Crystalline silicon, Composite material, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, spatial resolution, Strain gauge, 010302 applied physics, 021001 nanoscience & nanotechnology, Piezoresistive effect, flexible substrate, chemistry, Gauge factor, Thin-film transistor, strain gauge, transistor, Field-effect transistor, 0210 nano-technology
Abstract: International audience; Microcrystalline silicon films are used as piezoresistive material to fabricate resistor and transistor strain gauges. Very small gauges are fabricated allowing the possibility to measure high deformations with both high sensitivity and spatial resolution. Resistor gauges with 5 x 125 μm² smallest size showed a gauge factor of -24 when applying high strains (0.55%, radius of curvature 5 mm). Field effect thin film transistor (TFT) gauges showed a gauge factor of -85 but under slightly lower strains (0.45%, radius of curvature 10 mm). This value is close to strain gauges made of single crystalline silicon (~ 100, regarding the absolute value), but which are not flexible and then cannot support high deformations. The more complex technological process of TFT gauges could reserve their use to the measurement of low deformations when high resolution is required, while resistor gauges could be chosen when focusing on a mix between size and sensitivity in a large range of deformations.
Published: 2013

49. Effect of Sodium Concentration on the Synthesis of Faujasite by Two-step Synthesis Procedure

Author: Chunzheng Wang, Svetlana Mintova, Hailing Guo, Lei Zhao, Lijuan Wang, Ge Yang, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), China University of Petroleum, School of Mathematics and Statistics [Wuhan], Wuhan University [China], Laboratoire catalyse et spectrochimie (LCS), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), and Nantes Université (NU)-Université de Rennes 1 (UR1)
Subjects: Materials science, synthesis, Sodium, chemistry.chemical_element, 02 engineering and technology, engineering.material, 010402 general chemistry, 01 natural sciences, law.invention, chemistry.chemical_compound, Aluminosilicate, law, morphology, [CHIM]Chemical Sciences, zeolite, alkali metal, Crystallization, Zeolite, General Chemistry, Faujasite, 021001 nanoscience & nanotechnology, Alkali metal, 0104 chemical sciences, Amorphous solid, chemistry, Sodium hydroxide, engineering, 0210 nano-technology, Nuclear chemistry
Abstract: International audience; The relationship between concentration of sodium cations and the properties of faujasite (FAU) zeolite using a two-step synthesis procedure including (1) formation of amorphous aluminosilicate precursors and separation of amorphous nanoparticles, and (2) transformation of these amorphous particles into zeolite crystals by treatment with alkali solutions (NaOH) were studied. Three representative samples including two nano-sized zeolites and one micron-sized zeolite were prepared using different concentration of sodium hydroxide. The crystallization process of these zeolites was studied in details by FTIR, NMR, XRD, SEM, TEM, N 2 adsorption. The results indicated that minor changes in the concertation of inorganic cations can significantly shorten the induction period and crystallization time and thus affect the morphology, size and chemical composition of the zeolite crystals.
Published: 2021

50. Design and Measurements of a High-Performance Wideband Transmitarray Antenna for D-Band Communications

Author: Ronan Sauleau, Yoann Letestu, Wassim Saleh, Eduardo Motta Cruz, Institut d'Électronique et des Technologies du numéRique (IETR), Nantes Université (NU)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Radio Frequency Systems France (RFS), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), and French Research Program Convention Industrielle de Formation par la REcherche
Subjects: [SPI.OTHER]Engineering Sciences [physics]/Other, Physics, dual polarization, business.industry, Aperture, Flat lens, millimeter-wave antenna, 020206 networking & telecommunications, 02 engineering and technology, Feed horn, D-band, [SPI.TRON]Engineering Sciences [physics]/Electronics, [SPI]Engineering Sciences [physics], Optics, D band, 0202 electrical engineering, electronic engineering, information engineering, Insertion loss, Transmitarray, Electrical and Electronic Engineering, Wideband, Center frequency, Antenna (radio), business, high gain, backhauling
Abstract: International audience; A low-cost dual linearly-polarized transmitarray antenna (TA) is presented for 5G and beyond networks at D-band. This TA is made of 40 40 unit-cells (UCs) and is illuminated by a stepped feed horn with a F/D ratio equal to 0.75. The flat lens panel is based on UCs with six different phase states at the center frequency of 150 GHz (thus leading in average to a 2-bit phase quantization and 0.7-dB insertion loss from 130 to 175 GHz). Each UC is made of only three metal layers and does not include any via connection to guaranty performance robustness with respect to fabrication dispersions. The measured1-dB and 3-dB TA gain bandwidths equal 16.8% and 19.8%, respectively, with a peak gain of 32 dBi, corresponding to an aperture efficiency of 32% at 150 GHz. The measured sidelobe and cross-polarization levels in E and H planes remain below -21 and -37 dB, respectively. An excellent agreement between measured and simulated radiation patterns was observed.
Published: 2021

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