Author: "Jean-Baptiste Dore" / Topic: electronic engineering - Searchworks@Jio Institute Digital Library Search Results

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40 results on '"Jean-Baptiste Dore"'

1. Investigating sub-THz PHY layer for future high-data-rate wireless backhaul

Author: Mohammed Zahid Aslam, Gregory Gougeon, Yoan Corre, Jean-Baptiste Dore, and Simon Bicais
Subjects: High data rate, Terahertz radiation, Computer science, Wireless backhaul, Electronic engineering, Physical layer, General Physics and Astronomy
Published: 2021
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2. Design of Digital Communications for Strong Phase Noise Channels

Author: Simon Bicais and Jean-Baptiste Dore
Subjects: Computer science, Binary number, Sub-TeraHertz communications, 02 engineering and technology, binary labeling, Phase noise, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Demodulation, Wireless, maximum likelihood detection, Computer Science::Information Theory, Oscillator phase noise, Computer simulation, business.industry, 020208 electrical & electronic engineering, channel estimation, lcsh:TA1001-1280, 020206 networking & telecommunications, lcsh:HE1-9990, phase noise, constellation, lcsh:Transportation engineering, lcsh:Transportation and communications, business, 5G, Communication channel
Abstract: To meet the requirements of beyond 5G networks, the significant amount of unused spectrum in sub-TeraHertz frequencies is contemplated for high-rate wireless communications. Yet, the performance of sub-TeraHertz systems is severely degraded by strong oscillator phase noise. We investigate in this paper the design of digital communications robust to phase noise. This problem is addressed in three steps: the characterization of the phase noise channel, the design of the optimum receiver, and the optimization of the modulation scheme. This paper proposes a joint performance and implementation optimization. First, we address the design of the demodulation scheme for phase noise channels and propose the polar metric, a soft-decision rule for symbol detection. It is shown that performance gains are achieved for coded and uncoded systems with valuable complexity reductions of the receiver. Second, we investigate the optimization of the modulation scheme for phase noise. We demonstrate that using a constellation defined upon a lattice in the amplitude-phase domain leads to significant performance gains and a low-complexity implementation. Thereupon, we propose the Polar-QAM scheme with efficient binary labeling and demodulation. Numerical simulation results show that the proposed modulation and demodulation schemes offer valuable solutions to achieve high-rate communications on systems strongly impaired by phase noise.
Published: 2020
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3. Design of MIMO Systems using Energy Detectors for Sub-TeraHertz Applications

Author: Valentin Savin, Simon Bicays, and Jean-Baptiste Dore
Subjects: Oscillator phase noise, Computer science, business.industry, 05 social sciences, Detector, MIMO, 020206 networking & telecommunications, 02 engineering and technology, 0502 economics and business, Phase noise, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Wireless, business, 050203 business & management, 5G, Energy (signal processing), Computer Science::Information Theory, Communication channel
Abstract: The significant amount of unused spectrum in sub-TeraHertz frequencies is contemplated to realize high rate wireless communications for beyond 5G networks. Yet, the performance of sub-TeraHertz systems is severely degraded by strong oscillator phase noise. Therefore, we investigate in this paper the use of multiple-input multiple-output (MIMO) systems with energy detection receivers to achieve high rate communications robust to phase noise. First, the design of the receiver detection algorithm is addressed. We derive the joint maximum likelihood detector corresponding to the studied nonlinear MIMO channel. Second, the system performance is assessed through numerical simulations. We consider a realistic scenario modeling an indoor wireless link with directive antennas and strongly correlated line-of-sight channels. Our results demonstrate that high rate sub-TeraHertz systems can be implemented on low-complexity and low-power architectures using MIMO systems and energy detection receivers.
Published: 2020
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4. Optimized Single Carrier Transceiver for Future Sub-TeraHertz Applications

Author: Jean-Baptiste Dore, Yoann Corre, Gregory Gougeon, Simon Bicais, 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), SIRADEL, Siradel, ENGIE, and BICAIS, Simon
Subjects: Terahertz radiation, Computer science, [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Design optimization, Sub-TeraHertz communications, 02 engineering and technology, Ray-tracing, Digital modulation, 0502 economics and business, Phase noise, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Demodulation, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing, Oscillator phase noise, Wireless network, 05 social sciences, 020206 networking & telecommunications, [SPI.TRON] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics, Modulation, Transceiver, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, 050203 business & management, Communication channel
Abstract: International audience; The performance of sub-THz communications, contemplated for the next generation of wireless networks, are significantly degraded by oscillator phase noise. In this paper, we address the design of a single carrier transceiver resilient to phase noise. This problem is treated in two steps: First, we derive for phase noise channels the optimum symbol detection criterion. Second, we propose a phase noise robust modulation scheme with a comprehensive and efficient structure. System level simulations modeling the sub-THz propagation channel of a rich outdoor environment through ray tracing are also presented. Results show that optimizing the modulation and demodulation schemes is necessary to achieve high spectral efficiency in the presence of phase noise.
Published: 2020
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5. Assessment of sub-THz Mesh Backhaul Capabilities from Realistic Modelling at the PHY Layer

Author: Simon Bicais, Jean-Baptiste Dore, Mohammed Zahid Aslam, Gregory Gougeon, Yoann Corre, Corre, Yoann, SIRADEL, and ENGIE
Subjects: Modulation, Physical layer, Computer science, Wireless network, Data stream mining, 020208 electrical & electronic engineering, Transport network, 020206 networking & telecommunications, 02 engineering and technology, [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation, Polar modulation, Propagation model, Backhaul (telecommunications), sub-THz communications, Gigabit, Phase noise, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, [INFO.INFO-MO] Computer Science [cs]/Modeling and Simulation, Backhaul, Phase noise. I
Abstract: International audience; Spectrum above 90 GHz is a key promising investigation domain to offer future wireless networks with performance beyond IMT 2020 such as 100+ Gbit/s data rate or sub-ms latency. As the propagation is strongly constrained at those frequencies, the short-range connectivity is a relevant target application. However, the huge available bandwidth can also serve the backhaul transport network in the perspective of future ultra-dense deployments, and massive fronthaul data streams. This paper investigates the feasibility and characteristics of the sub-THz mesh backhauling either installed in the streets or inside a large venue. The study relies on the highly realistic simulation of the physical layer performance, based on detailed geographical representation, ray-based propagation modelling, RF phase noise impairment, and a new robust polar modulation. It is shown that each link of a dense mesh backhaul network can reliably deliver several Gbit/s per 1-GHz carrier bandwidth.
Published: 2020

6. Waveform contenders for 5G: Description, analysis and comparison

Author: Dimitri Ktenas, Robin Gerzaguet, Nicolas Cassiau, Jean-Baptiste Dore, 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), Algorithmes et architectures adaptatifs pour les systèmes sans-fils efficaces en énergie (GRANIT), ARCHITECTURE (IRISA-D3), 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)-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), ANR-15-CE25-0005,WONG5,Formes d'Ondes 5G pour Communications entre Machines(2015), European Project: 671660,H2020,H2020-ICT-2014-2,FANTASTIC-5G(2015), 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)-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), 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), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)
Subjects: FBMC-QAM, Computer science, Air interface, Real-time computing, UFMC, 050801 communication & media studies, 02 engineering and technology, Interference (wave propagation), 0508 media and communications, 5G cellular networks, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Waveform, Electrical and Electronic Engineering, OFDM, SC-FDMA, Multicarrier modulation, 05 social sciences, Spectral density, 020206 networking & telecommunications, Spectral efficiency, FBMC-OQAM, Asynchronous communication, Bit error rate, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Communication channel
Abstract: International audience; 5G will have to cope with a high degree of heterogeneity in terms of services and requirements. Among these latter, flexible and efficient use of all available non-contiguous spectra for different network deployment scenarios is one challenge for the future 5G. To maximize spectrum efficiency, a flexible 5G air interface technology capable of mapping various services to the best suitable combinations of frequency and radio resources will also be required. In this work, a fair comparison of several 5G waveform candidates (UFMC, FBMC-OQAM, and FBMC-QAM) is proposed under a common framework. Spectral efficiency, power spectral density, peak to average power ratio and performance in terms of bit error rate under various realistic channel conditions are assessed. The waveforms are then compared in an asynchronous multiuser uplink transmission. Based on these results, in order to increase the spectral efficiency, a bit loading algorithm is proposed to cope with the non-uniform distribution of the interference across the carriers. The benefits of these new waveforms for the foreseen 5G use cases are clearly highlighted. It is also stressed that some concepts still need to be improved to achieve the full range of expected benefits of 5G.
Published: 2017
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7. Study of OFDM Precoded Filter-Bank Waveforms

Author: Robin Gerzaguet, David Demmer, Rostom Zakaria, Jean-Baptiste Dore, Didier Le Ruyet, 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), CEDRIC. Traitement du signal et architectures électroniques (CEDRIC - LAETITIA), Centre d'études et de recherche en informatique et communications (CEDRIC), Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), GIPSA - Communication Information and Complex Systems (GIPSA-CICS), Département Images et Signal (GIPSA-DIS), Grenoble Images Parole Signal Automatique (GIPSA-lab ), 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 [2016-2019] (UGA [2016-2019])-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 [2016-2019] (UGA [2016-2019])-Grenoble Images Parole Signal Automatique (GIPSA-lab ), 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 [2016-2019] (UGA [2016-2019])-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 [2016-2019] (UGA [2016-2019]), Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), 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), Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), 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)-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)
Subjects: intrinsic inter- ference rejection, Orthogonal frequency-division multiplexing, Computer science, Applied Mathematics, MIMO, 020206 networking & telecommunications, 02 engineering and technology, Spectral efficiency, intrinsic interference rejection, Precoding, Multiplexing, Computer Science Applications, Cyclic prefix, QAM, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Electrical and Electronic Engineering, FFT-FBMC, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Decoding methods, Communication channel, BF-OFDM, LTE numerology
Abstract: International audience; Forthcoming wireless systems will have to cope with a heterogeneous and dense traffic. High demands in terms of bandwidth use efficiency and increased flexibility are therefore required for the related air-interface technology. In this context, Filter-Bank MultiCarrier with Offset QAM (FBMC/OQAM) waveform has been recognized as an enabling technology providing strong assetswith a well confined spectrum and enhanced spectral efficiency with respect to Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM). Nonetheless, FBMC-OQAM presents a few challenges to overcome: the intrinsic interference must be taken into consideration in the channel estimation processes and multiple antenna schemes design. Those challenges are induced by the reduction of the orthogonality property to the real field. In this paper, OFDM precoding/decoding is proposed as an lternative to the OQAM signaling for filter-bank based waveforms. The OFDM precoding makes the waveforms near-complex orthogonal which enables a straightforward adaptation to channel estimation techniques and MIMO scheme design. Two waveforms based on this precoding, namely Fast Fourier Transform FBMC (FFT-FBMC) and Block Filtered OFDM (BF-OFDM), have been proposed.A common framework is proposed to study the two waveforms. The paper also investigates changing the time structure of the transmitted signal by introducing the rate factor parameter. It is shown that intrinsic interference can be greatly reduced at the price of a slight side-lobe increase.
Published: 2019
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8. Channel Estimation Strategy for LPWA Transmission at Low SNR: Application to Turbo-FSK

Author: Jean-Baptiste Dore, Valerian Mannoni, Vincent Berg, 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), ANR-16-CE25-0002,EPHYL,Amélioration des formes d'onde des réseaux cellulaires basse puissance pour l'internet des objets(2016), Berg, Vincent, and Amélioration des formes d'onde des réseaux cellulaires basse puissance pour l'internet des objets - - EPHYL2016 - ANR-16-CE25-0002 - AAPG2016 - VALID
Subjects: Computer science, Turbo, 02 engineering and technology, Noise (electronics), [MATH.MATH-IT] Mathematics [math]/Information Theory [math.IT], NB-IoT, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Waveform, Zadoff-Chu, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing, Computer Science::Information Theory, LPWA, Frequency-shift keying, biology, Physical layer, [MATH.MATH-IT]Mathematics [math]/Information Theory [math.IT], 020206 networking & telecommunications, biology.organism_classification, [SPI.TRON] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics, Power (physics), Constant Envelope, Transmission (telecommunications), [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Communication channel
Abstract: International audience; Turbo Frequency Shift Keying has been considered as a promising physical layer for low power wide-area network connectivity. Because of its constant envelope amplitude and the efficiency of its iterative receiver performance close to Shannon's limit can be achieved. However, results published so far in the literature for the waveform have assumed perfect channel estimation or Signal-to-noise (SNR) levels that are higher than the SNR levels considered for these applications. This paper analyzes a channel estimation strategy based on a specifically adapted pilot sequence. Simulations have been performed to evaluate the performance of the proposed approach. Performance loss induced by imperfect channel estimation algorithms is estimated.
Published: 2019
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9. Contender waveforms for Low-Power Wide-Area networks in a scheduled 4G OFDM framework

Author: Jean-Baptiste Dore, Laurent Ros, Vincent Berg, Yoann Roth, 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), GIPSA - Communication Information and Complex Systems (GIPSA-CICS), Département Images et Signal (GIPSA-DIS), Grenoble Images Parole Signal Automatique (GIPSA-lab ), 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 [2016-2019] (UGA [2016-2019])-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 [2016-2019] (UGA [2016-2019])-Grenoble Images Parole Signal Automatique (GIPSA-lab ), 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 [2016-2019] (UGA [2016-2019])-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 [2016-2019] (UGA [2016-2019]), and ANR-16-CE25-0002,EPHYL,Amélioration des formes d'onde des réseaux cellulaires basse puissance pour l'internet des objets(2016)
Subjects: Computer science, Orthogonal frequency-division multiplexing, lcsh:TK7800-8360, 02 engineering and technology, lcsh:Telecommunication, Turbo codes, FSK, lcsh:TK5101-6720, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Turbo code, Zadoff-Chu, Rayleigh fading, Computer Science::Information Theory, OFDM, Frequency-shift keying, LPWA, Amplifier, lcsh:Electronics, Physical layer, [MATH.MATH-IT]Mathematics [math]/Information Theory [math.IT], 020206 networking & telecommunications, 020207 software engineering, [SPI.TRON]Engineering Sciences [physics]/Electronics, Modulation, Constant envelope, Cellular network, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Communication channel
Abstract: International audience; When designing new solutions for Low-Power Wide-Area (LPWA) networks, coexistence and integration into existing 4G frameworks should be considered to ease the deployment procedure and reduce costs. In a previous work, Turbo-FSK was proposed as a potential physical layer for LPWA networks. With its constant envelope and high energy efficiency, the scheme is a serious contender for this type of networks. We propose to study the system in the Orthogonal Frequency Division Multiplexing (OFDM) framework, currently used by existing cellular networks and also considered for the recently standardized Narrow-Band IoT (NB-IoT). Several extensions of the Turbo-FSK scheme are presented. A hybrid modulation alphabet, combining orthogonal with linear modulations, is introduced, and the substitution of Frequency Shift Keying (FSK) modulation for another orthogonal modulation based on Zadoff-Chu (ZC) sequences is considered. Simulations are run under various conditions including Rayleigh fading channel with mobility, demonstrating that the Turbo-FSK scheme is able to achieve performance close to the Turbo Coded Orthogonal Frequency Division Multiplexing (TC-OFDM) when a low rate is considered. When considering hybridation of the alphabet, limitations appear for higher data rate, which can be overcome by changing the orthogonal alphabet. The study of the variation of the envelope of the compared solutions emphasizes the crucial trade-off between performance and efficiency of the power amplifier (PA), a main concern for low-power applications. While using the proposed solutions, we demonstrate that energy consumption can be reduced by up to a factor of 2.5.
Published: 2018
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10. Filter-bank OFDM transceivers for 5G and beyond

Author: Robin Gerzaguet, Didier Le Ruyet, Jean-Baptiste Dore, David Demmer, Rostom Zakaria, 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), CEDRIC. Traitement du signal et architectures électroniques (CEDRIC - LAETITIA), Centre d'études et de recherche en informatique et communications (CEDRIC), Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), 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), Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), 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)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique)
Subjects: Orthogonal frequency-division multiplexing, Computer science, Radio Link Protocol, 05 social sciences, Bandwidth (signal processing), 020206 networking & telecommunications, 02 engineering and technology, Interference (wave propagation), Filter bank, Multiplexing, law.invention, Base station, law, 0502 economics and business, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Waveform, Transceiver, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, 050203 business & management, 5G
Abstract: International audience; 5G paves the way to service-centric adaptationradio link. The transmitted signal is now configured accordingto the service it provides and the propagation impairments itsuffers from. However, in 5G the multi-service multiplexing leadsto a poor bandwidth use. Indeed, CP-OFDM is responsible forlarge out-of-band emission and therefore large guard bands arerequired between bands of different numerologies. In this paper,the authors investigate the use of filter-bank based waveforms asan alternative of legacy CP-OFDM. Such waveforms prove to bean enabling technology for an efficient multi-service multiplexing.Moreover, it is possible to configure a unique filtering stage,i.e. the PolyPhase-Network, to simultaneously address differentnumerologies in the same system bandwidth. This result wouldease the support of real-time numerology adaptation as one basestation could provide different services in the same cell. Thispaper is rather dedicated on the study of BF-OFDM which is afilter-bank based waveform which relies on a 5G NR OFDMreceiver. Nonetheless the waveform provides great results onthe considered evaluation scenarios for a reasonable complexityincrease.
Published: 2018
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11. Impact of selective channels on post-OFDMwaveforms for 5G Machine Type Communications

Author: Daniel Roviras, Yahia Medjahdi, Sylvain Traverso, Rafik Zayani, Yves Louet, Didier Le Ruyet, Mouna Ben Mabrouk, Hmaied Shaiek, Jean-Baptiste Dore, Robin Gerzaguet, David Demmer, Rostom Zakaria, Institut Supérieur d'Electronique de Paris (ISEP), 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), CEDRIC. Traitement du signal et architectures électroniques (CEDRIC - LAETITIA), Centre d'études et de recherche en informatique et communications (CEDRIC), Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), Thales Communications [Colombes], THALES [France], 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), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), 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), ANR-15-CE25-0005,WONG5,Formes d'Ondes 5G pour Communications entre Machines(2015), 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), THALES, Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), 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: Computer science, Orthogonal frequency-division multiplexing, business.industry, 05 social sciences, 020206 networking & telecommunications, 02 engineering and technology, Precoding, Delay spread, Time–frequency analysis, Interference (communication), Modulation, 0502 economics and business, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Waveform, Wireless, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, 050203 business & management, ComputingMilieux_MISCELLANEOUS
Abstract: This paper proposes a thorough comparison of post-OFDM waveforms with both time and frequency selective channels. The waveforms which are considered are CP-OFDM, f-OFDM, WOLA, WOLA-COQAM, FBMC-OQAM, UF-OFDM, Wavelet-OFDM, FFT-FBMC and BF-OFDM. All these waveforms are potential candidates to support critical machine type communications (C-MTC) typically between devices. Based on real propagation channels, it first appears that UF -OFDM is more sensitive to delay spread compared to the others waveforms which have all similar performance. For large velocities, WOLA-COQAM, FFT-FBMC and BF-OFDM experience error floors much larger than the other waveforms.
Published: 2018
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12. Above-90GHz Spectrum and Single-Carrier Waveform as Enablers for Efficient Tbit/s Wireless Communications

Author: Simon Bicais, Faouzi Bader, Emmanuel Faussurier, Jacques Palicot, Yoann Corre, Jean-Baptiste Dore, Dimitri Ktenas, 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), SIRADEL, ENGIE, 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), ANFR, ANR-17-CE25-0013, ANR-17-CE25-0013,BRAVE,Retour à la modulation monoporteuse pour des communications beyond-5G au-delà de 90GHz(2017), 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: Wireless network, Orthogonal frequency-division multiplexing, Computer science, business.industry, Bandwidth (signal processing), Physical layer, 020206 networking & telecommunications, Throughput, 02 engineering and technology, 7. Clean energy, Radio spectrum, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Wireless, 020201 artificial intelligence & image processing, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Communication channel, Efficient energy use
Abstract: International audience; —The radio spectrum above 90GHz offers opportunities for huge signal bandwidths, and thus unprecedented increase in the wireless network capacity, beyond the performance defined for the 5G technology. This spectrum is essentially exploited for scientific services, but attracts nowadays many interest within the wireless telecommunications research community, following the same trend as in previous network generations. The BRAVE project that was launched at early 2018, aims at the elaboration of new waveforms able to efficiently operate in the 90–200 GHz spectrum. The researches rely on three complementary works: the definition of relevant communications scenarios (spectrum usage, application, environment, etc); the development of realistic models for the physical layer (propagation channel and RF equipments); and the elaboration of a single-carrier modulation compliant with the propagation channel properties, and allowing improvement on the spectral and energy efficiency. The motivation for this work, and the preliminary results on the waveform definition, are exposed in the present paper. Index Terms—Tbit/s, beyond-5G, above-90GHz, single-carrier. I. INTRODUCTION The activities of research and industrialization concerning the fifth generation (5G) of wireless communication systems are well-under way. Several solutions are proposed for standardization starting with 5G-NR (New Radio) [1]. There are three main objectives driving the development of 5G: the support to extreme wireless broadband services for applications such as the virtual and augmented realities, the 3D 4K video, cloud services, etc.; the connectivity for massive Internet of Thing (IoT) applications as: smart cities and factories, wireless health care; and the support of mission-critical services such as for autonomous vehicle, or security, with strong requirements on latency, guaranteed throughput, etc. All these target applications have highly different needs, but make 5G required to offer: throughputs in the order of Gbps with sub-millisecond latency along with 1000x capacity increase, and 100x connected devices per cell compared to nowadays existing mobile networks. Dense small-cell deployments , centralized RAN (Radio Access Network), advanced MIMO schemes and new millimeter-Wave (mmW) bands are key enablers to achieve the expected increase in spectral efficiency and capacity [2]. Frequency bands 26 or 28 GHz and 39 or 42 GHz will be likely selected for early 5G deployments. Alongside these 5G initiatives, the scientific community has also launched many investigations on the beyond 5G
Published: 2018
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13. Analytical study of 5G NR eMBB co-existence

Author: Didier Le Ruyet, Jean-Baptiste Dore, Robin Gerzaguet, David Demmer, 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), Algorithmes et architectures adaptatifs pour les systèmes sans-fils efficaces en énergie (GRANIT), ARCHITECTURE (IRISA-D3), 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), Centre d'études et de recherche en informatique et communications (CEDRIC), Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), 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), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), 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)-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), 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: FOS: Computer and information sciences, Computer science, Orthogonal frequency-division multiplexing, Information Theory (cs.IT), Computer Science - Information Theory, Bandwidth (signal processing), Guard band, Physical layer, 020206 networking & telecommunications, 02 engineering and technology, Interference (wave propagation), Multiplexing, Frequency-division multiplexing, 5G NR, inter-numerology interference, Side lobe, Distortion, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, PHY layer, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, OFDM
Abstract: 3GPP release 15 focusing on 5G general outline has been published in December 2017. The major difference with respect to currently deployed LTE is the support of various physical layer numerologies. Making the physical layer scalable allows to properly address new services such as low latency or millimeter communications. However it poses the problem of numerology coexistence. Indeed the orthogonality of the OFDM waveform is broken by the use of different subcarrier spacings and therefore multiplexed communications may interfere with each others. A first and simple solution to limit the distortion is to consider guard bands. In this paper, the authors develop analytical metrics to quantify the level of distortion induced by 5G multi-service multiplexing. Besides, general comments and guard band dimensioning are carried out. It is shown that high interference rejection needs to be associated with side lobe reduction techniques to favor an efficient bandwidth use., Conference paper submitted to IEEE ICT 2018 - See paper on officiel IEEE library when available
Published: 2018
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14. 5G Contender Waveforms for Low Power Wide Area Networks in a 4G OFDM Framework

Author: Jean-Baptiste Dore, Vincent Berg, Yoann Roth, Laurent Ros, Berg, Vincent, Amélioration des formes d'onde des réseaux cellulaires basse puissance pour l'internet des objets - - EPHYL2016 - ANR-16-CE25-0002 - AAPG2016 - VALID, 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 INP (Grenoble INP), ANR-16-CE25-0002,EPHYL,Amélioration des formes d'onde des réseaux cellulaires basse puissance pour l'internet des objets(2016), GIPSA - Communication Information and Complex Systems (GIPSA-CICS), Département Images et Signal (GIPSA-DIS), Grenoble Images Parole Signal Automatique (GIPSA-lab ), 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 [2016-2019] (UGA [2016-2019])-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 [2016-2019] (UGA [2016-2019])-Grenoble Images Parole Signal Automatique (GIPSA-lab ), 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 [2016-2019] (UGA [2016-2019])-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 [2016-2019] (UGA [2016-2019]), and Ros, Laurent
Subjects: [INFO.INFO-TS] Computer Science [cs]/Signal and Image Processing, Computer science, Orthogonal frequency-division multiplexing, Data_CODINGANDINFORMATIONTHEORY, FSK, [MATH.MATH-IT] Mathematics [math]/Information Theory [math.IT], [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, 0502 economics and business, Electronic engineering, Rayleigh fading, OFDM, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing, Frequency-shift keying, LPWA, 9. Industry and infrastructure, Index Terms—LPWA, 05 social sciences, 050209 industrial relations, Physical layer, [MATH.MATH-IT]Mathematics [math]/Information Theory [math.IT], Keying, Turbo Codes, [SPI.TRON] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics, Constant Envelope, Transmission (telecommunications), Cellular network, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, 050203 business & management, 5G, Communication channel
Abstract: International audience; —When designing new solutions for Low Power Wide Area (LPWA) networks, coexistence and integration into existing 4G frameworks should be considered to ease the deployment procedure and reduce costs. In a previous work, Turbo-Frequency Shift Keying (FSK) was proposed as a potential physical layer for LPWA networks. We propose to study the system in the Orthogonal Frequency Division Multiplexing (OFDM) framework , currently used by existing cellular networks and also considered for the recently standardized Narrow-Band IoT. The new architectures of the Turbo-FSK transmitter and receiver are presented. Simulations are run under various conditions including Rayleigh fading channel with mobility, demonstrating the Turbo-FSK scheme to achieve performance close to Turbo-Coded OFDM. The scheme also exhibits a constant envelope, which may multiply the Power Amplifier (PA) efficiency by up to a factor of 2 and makes the solution a promising candidate for 5G LPWA transmission.
Published: 2018

15. Comparison of promising candidate waveforms for 5G: WOLA-OFDM versus BF-OFDM

Author: Rafik Zayani, Jean-Baptiste Dore, Daniel Roviras, Robin Gerzaguet, David Demmer, Hmaied Shaiek, Yahia Medjahdi, 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), CEDRIC. Traitement du signal et architectures électroniques (CEDRIC - LAETITIA), Centre d'études et de recherche en informatique et communications (CEDRIC), Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), and Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM)
Subjects: Radio access network, Orthogonal frequency-division multiplexing, Computer science, business.industry, 05 social sciences, Transmitter, 050801 communication & media studies, 020206 networking & telecommunications, 02 engineering and technology, Spectral efficiency, [SPI]Engineering Sciences [physics], 0508 media and communications, Asynchronous communication, Robustness (computer science), 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Wireless, Transceiver, business, ComputingMilieux_MISCELLANEOUS
Abstract: One of the main issues, in the specification of the 5G radio access network (RAN) technology, is the design of a new waveform, overcoming the limitations of the CP-OFDM in terms of frequency localization, spectral efficiency and robustness to users asynchronism, while keeping low latency and reduced transceiver implementation complexity. In the last decade, many waveforms have been proposed in order to achieve the best compromise between the aforementioned constraints. This paper aims at comparing, as fair as possible, the performances of promising schemes namely WOLA-OFDM and BF-OFDM in terms of spectrum confinement, transmitter complexity and robustness in a typical multi-user asynchronous scenario.
Published: 2017
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16. Filter design for 5G BF-OFDM waveform

Author: David Demmer, Didier Le Ruyet, Jean-Baptiste Dore, Dimitri Ktenas, Robin Gerzaguet, 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), CEDRIC. Traitement du signal et architectures électroniques (CEDRIC - LAETITIA), Centre d'études et de recherche en informatique et communications (CEDRIC), Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), and Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM)
Subjects: Computer science, Orthogonal frequency-division multiplexing, business.industry, 05 social sciences, Transmitter, 050801 communication & media studies, 020206 networking & telecommunications, 02 engineering and technology, Filter (signal processing), Precoding, Filter design, 0508 media and communications, 0202 electrical engineering, electronic engineering, information engineering, Baseband, Electronic engineering, Waveform, Telecommunications, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Frequency modulation
Abstract: International audience; A flexible and efficient use of the frequency resource is a key challenge for future wireless technologies. The new requirements are not satisfied by the CP-OFDM which has motivated the research on alternative waveforms. Recently, Block-Filtered OFDM modulation scheme has been proposed. This waveform addresses most of the CP-OFDM's drawbacks at the price of a slight complexity increase of the transmitter. The scheme is based on a filter-bank, a precoding stage that ensures the Near Perfect Reconstruction property and a pre-compensation stage which avoids filtering at the receiver. In this paper, the filter specifications for BF-OFDM are derived and an optimization method based on self-interference rejection is proposed. Optimized filter shape can provide up to 70 dB of Signal-to-Interference Ratio which justifies the Near Perfect Reconstruction property with an enhanced spectral confinement and no channel performance degradation.
Published: 2017
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17. Block-filtered OFDM: A new promising waveform for multi-service scenarios

Author: Jean-Baptiste Dore, Robin Gerzaguet, Dimitri Ktienas, and David Demmer
Subjects: Computer science, business.industry, Orthogonal frequency-division multiplexing, Air interface, 05 social sciences, Transmitter, Real-time computing, MIMO, Equalization (audio), 050801 communication & media studies, 020206 networking & telecommunications, 02 engineering and technology, Spectral efficiency, 0508 media and communications, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Waveform, Wireless, business, Block (data storage)
Abstract: 5G will have to cope with a high degree of heterogeneity in terms of services and requirements. Among these latter, flexible and efficient use of all available non-contiguous spectrums for different network deployment scenarios is one challenge for the future 5G. To maximize spectrum efficiency, the 5G air interface technology will also need to be flexible and capable of mapping various services to the best suitable combinations of frequency and radio resources. Such requirements are not satisfied by legacy CP-OFDM and alternative multicarrier waveforms such as UFMC and FBMC partially meet them. In this article, we introduce a new quasi-orthogonal waveform called Block-Filtered OFDM (BF-OFDM) that combines most of the advantages of the aforementioned waveforms at the price of slight complexity increase. Spectral localization and performance in multi-user scenario will be enhanced w.r.t OFDM and simple equalization as well as all classical MIMO schemes can be straightforwardly considered. The proposed waveform offers the same performance in presence of multipath channel as CP-OFDM and is also scalable which paves the way for future multi-service scenarios.
Published: 2017
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18. Block-filtered OFDM: A novel waveform for future wireless technologies

Author: Robin Gerzaguet, Jean-Baptiste Dore, Didier Le Ruyet, David Demmer, Dimitri Ktenas, 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), CEDRIC. Traitement du signal et architectures électroniques (CEDRIC - LAETITIA), Centre d'études et de recherche en informatique et communications (CEDRIC), Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Ecole Nationale Supérieure d'Informatique pour l'Industrie et l'Entreprise (ENSIIE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), and HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)
Subjects: Orthogonal frequency-division multiplexing, business.industry, Computer science, 05 social sciences, 050801 communication & media studies, 020206 networking & telecommunications, 02 engineering and technology, 0508 media and communications, Modulation, Scalability, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Waveform, Wireless, Mobile technology, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, 5G, Computer network, Block (data storage)
Abstract: International audience; The forthcoming fifth generation of mobile technology (5G) will be designed to satisfy the demands of 2020 and beyond. 5G does not just promise a huge increase in terms of data rates and capacity but it also targets new kind of use cases like Internet of Things or vehicular communications. The currently deployed 4G technology does not provide enough network capabilities to support this wide diversity of applications which has motivated the research on alternative waveforms. In this article, a new promising modulation scheme is introduced: Block-Filtered OFDM (BF-OFDM). The proposed waveform demonstrates an excellent frequency localization and can straightforwardly be integrated with the OFDM know-how and LTE principles. Besides, the proposed waveform relies on a receiver similar to the one used in CP-OFDM. BF-OFDM systems are also scalable, which is an interesting feature in order to steer the network capabilities on demand.
Published: 2017
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19. Turbo-FSK, une couche physique pour les réseaux longue portée basse consommation : optimisation et comparaison

Author: Laurent Ros, Vincent Berg, Jean-Baptiste Dore, Yoann Roth, 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), GIPSA - Communication Information and Complex Systems (GIPSA-CICS), Département Images et Signal (GIPSA-DIS), Grenoble Images Parole Signal Automatique (GIPSA-lab ), 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 [2016-2019] (UGA [2016-2019])-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 [2016-2019] (UGA [2016-2019])-Grenoble Images Parole Signal Automatique (GIPSA-lab ), and 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 [2016-2019] (UGA [2016-2019])-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 [2016-2019] (UGA [2016-2019])
Subjects: Information transfer, Computer science, Turbo, Energy Engineering and Power Technology, 02 engineering and technology, Physics and Astronomy(all), 01 natural sciences, 010309 optics, Link budget, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Low Power Wide Area (LPWA), Frequency-shift keying, biology, Network packet, General Engineering, Physical layer, 020206 networking & telecommunications, biology.organism_classification, Turbo FSK, Internet of Things (IoT), Low rate, Efficient energy use, Data transmission
Abstract: Edited by SmaïlTedjiniApostolosGeorgiadis; International audience; As the Internet-of-Things is becoming a reality, the need for a new Low Power Wide Area (LPWA) network emerged in the last few years. Numerous low cost devices will be connected and this requires an optimization of the link budget: the physical layer needs to be designed highly energy efficient. The combination of M-ary orthogonal Frequency-Shift-Keying (M-FSK) modulation and coding in the same process has been shown to be a promising candidate when associated to an iterative receiver (turbo principle). In this work, we study this new digital transmission scheme, called Turbo-FSK. An EXtrinsic Information Transfer (EXIT) Chart analysis is realized. The influence of the packet length is investigated, and the scheme is shown to stay energy efficiency even with short packet sizes. Comparison with LPWA current technologies is performed, showing the potential of this technology.; L'Internet des Objets devient une réalité, et depuis plusieurs années le besoin d'un nouveau réseau longue portée basse consommation est apparu. Le but de ce réseau est de connecter un grand nombre de noeuds à faible coût, tout en optimisant le bilan de liaison. La couche physique doit alors alorsêtre définie très efficace energétiquement. La combinaison de la modulation orthogonale de fréquencè a M états avec un codage canal dans un processus conjoint, et non successif, à l'émission se révèle très efficace lorsqu'un récepteur itératif est utilisé. Ce papier concerne l'étude de cette technique Turbo-FSK avec l'outil d'analyse itérative EXIT (EXtrinsic Information Transfer, en anglais). La métrique est adaptée au cas de la M-FSK et l'influence de la taille du paquet est étudiée. On montre alors que la technique reste performante même lorsque que la taille de paquet est réduite. La comparaison avec des techniques actuelles est réalisée, montrant le potentiel de la technologie proposée.
Published: 2017
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20. Silicon area of FBMC receivers for CMOS 65nm and comparison to OFDM receivers

Author: Sylvie Mayrargue, Vincent Berg, Jean-Baptiste Dore, 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), and European Project: 671563,H2020,H2020-ICT-2014-2,Flex5Gware(2015)
Subjects: Silicon Area, Orthogonal frequency-division multiplexing, Computer science, Real-time computing, FBMC, 020206 networking & telecommunications, Complexity, Hardware_PERFORMANCEANDRELIABILITY, 02 engineering and technology, [SPI]Engineering Sciences [physics], CMOS, Frequency domain, 65nm CMOS, Hardware_INTEGRATEDCIRCUITS, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Cellular network, Adjacent channel, Waveform, FPGA Implementation, 020201 artificial intelligence & image processing, 5G Waveform, 5G, OFDM, Leakage (electronics)
Abstract: 5 p.; International audience; New waveforms are considered by the fifth generation (5G) of cellular networks to exploit the underutilized fragmented spectrum. FBMC is one possibility as it provides better adjacent channel leakage. This paper brings a first estimate of silicon area for FBMC in comparison to OFDM assuming a CMOS 65nm technology. The paper concludes that the silicon area overhead introduced by much more complex waveforms is deemed acceptable.
Published: 2017
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21. FBMC Implementation for a TVWS System

Author: Vincent Berg, Dominique Noguet, Jean-Baptiste Dore, and Dimitri Ktenas
Subjects: Engineering, Sampling (signal processing), business.industry, Orthogonal frequency-division multiplexing, PHY, Air interface, Frequency domain, Electronic engineering, Waveform, Context (language use), business, Baseline (configuration management)
Abstract: In this chapter, we discuss the implementation of an FBMC PHY for TVWS application. The baseline for this implementation is the recent IEEE 1900.7-2015 standard introduced in Chapter 2. To our knowledge, this is the first worldwide standard based on an FBMC air interface or, more generally speaking, on a nonorthogonal waveform. After a brief introduction, which highlights the benefits of FBMC in the context of TVWS, we describe the implementation using a frequency domain approach (namely Frequency Sampling FBMC, FS-FBMC). We show that this technique is very well suited for uncoordinated multiuser scenarios. We discuss the complexity of FS-FBMC implementation. Then, we analyze a flexible architecture that can manage FS-FBMC and OFDM modes with a discussion of the impact on the waveform on hardware constraints.
Published: 2017
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22. Channel estimation techniques for 5G cellular networks: FBMC and multiuser asynchronous fragmented spectrum scenario

Author: Jean-Baptiste Dore, Dimitri Ktenas, and Vincent Berg
Subjects: Engineering, Frequency-division multiple access, business.industry, Asynchronous communication, Orthogonal frequency-division multiple access, Cellular network, Electronic engineering, Context (language use), Electrical and Electronic Engineering, business, Filter bank, Preamble, Communication channel
Abstract: In order to reduce constant exchange of control signalling, relaxed synchronisation is considered for the fifth generation of wireless cellular networks. This requirement combined with dynamic spectrum access has led to reconsider conventional orthogonal frequency division multiple access. Frequency division multiple access for filter bank multicarrier FBMC modulation has emerged as a serious contender for these asynchronous fragmented spectrum access scenarios. In this paper, it is demonstrated that the frequency-spreading FBMC receiver architecture is particularly adapted to deal with these scenarios and is robust to severe channel conditions. Channel estimation has however so far only been partially addressed in this context. The challenges of this essential signal processing block are presented in this paper. Interference approximation methods have been applied to the so-called frequency-spreading FBMC receiver to propose and evaluate preamble structures and channel estimation schemes. A flexible preamble structure is finally described and analysed. Copyright © 2014 John Wiley & Sons, Ltd.
Published: 2014
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23. A flexible radio transceiver for TVWS based on FBMC

Author: Jean-Baptiste Dore, Dominique Noguet, and Vincent Berg
Subjects: Hardware architecture, Computer Networks and Communications, business.industry, Computer science, Filter bank, Cognitive radio, Transmission (telecommunications), Ultra high frequency, Broadcast television systems, Artificial Intelligence, Hardware and Architecture, Modulation, Embedded system, White spaces, Electronic engineering, Wireless, Transceiver, business, Software
Abstract: In this paper a flexible radio approach for opportunistic access to the television white space (TVWS) is presented. Requirement stems from the coexistence scheme used in this band between opportunistic transmission and TV broadcast signals (or wireless microphones). To ensure nonharmful interference of the TVWS signal on the incumbent services, a high adjacent leakage power ratio (ACLR) is expected. Also, flexibility is required to address the vacant channels in the UHF spectrum. Flexibility and low ACLR specifications are difficult to obtain simultaneously. The approach proposed in this paper is based on filter bank multi-carrier modulation (FBMC) scheme and a flexible hardware platform to combine the digital filtering capability of FBMC with RF agility. A FBMC hardware architecture implementation is presented and its associated complexity is studied for this platform. Then the hardware implementation validates that both flexibility and ACLR performance of the system are preserved even when off-the-shelf component impairments are considered. An experimental setup validates the coexistence with a TV broadcast signal and a comparison with a classical approach shows the gain in performance.
Published: 2014
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24. New Physical-layer Waveforms for 5G

Author: Gerhard Fettweis, Dimitri Ktenas, Thorsten Wild, Martin Kasparick, Maximilian Matthe, Gerhard Wunder, Luciano Leonel Mendes, Nicolas Cassiau, Frank Schaich, Vincent Berg, Nicola Michailow, Jean-Baptiste Dore, Yejian Chen, Mateusz Buczkowski, Ivan Gaspar, Slawomir Pietrzyk, and Peter Jung
Subjects: Engineering, business.industry, Network packet, Air interface, Frame (networking), Physical layer, 020206 networking & telecommunications, 010103 numerical & computational mathematics, 02 engineering and technology, 01 natural sciences, Transmission (telecommunications), Asynchronous communication, Scalability, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Wireless, 0101 mathematics, business
Abstract: This chapter provides fundamental indications about wireless communications beyond LTE/LTE‐A (5G). We start by identifying the drivers for making the transition to 5G networks, and we make clear that the strict paradigm of synchronism and orthogonality as applied in LTE prevents efficiency and scalability. We challenge this paradigm and propose new key PHY‐layer technology components, the core being a unified frame structure concept, which supports an integrated 5G air interface, capable of dealing both with broadband data services and small packet services within the same band. It is essential for this concept to introduce waveforms that are more robust than OFDM, for example with respect to time‐frequency misalignment. Encouraging candidate waveform technologies are presented and discussed with their respective results. This goes along with the corresponding multiple access technologies, using multi‐layered signals and advanced multi‐user receivers. In addition, we introduce new strategies to enable “one shot transmission”, with greatly reduced control signaling, particularly for sporadic traffic. These components enable an efficient and scalable air interface supporting the highly varying set of requirements originating from the 5G drivers.
Published: 2016
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25. EXIT chart optimization of Turbo-FSK: Application to Low Power Wide Area networks

Author: Laurent Ros, Jean-Baptiste Dore, Yoann Roth, Vincent Berg, 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), GIPSA - Communication Information and Complex Systems (GIPSA-CICS), Département Images et Signal (GIPSA-DIS), Grenoble Images Parole Signal Automatique (GIPSA-lab ), 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 [2016-2019] (UGA [2016-2019])-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 [2016-2019] (UGA [2016-2019])-Grenoble Images Parole Signal Automatique (GIPSA-lab ), and 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 [2016-2019] (UGA [2016-2019])-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 [2016-2019] (UGA [2016-2019])
Subjects: Computer science, Turbo, Low Power Wide Area, Machine, Real-time computing, Internet of Things, Data_CODINGANDINFORMATIONTHEORY, 02 engineering and technology, EXIT chart, 01 natural sciences, Machine-to, EXIT Chart, FSK, Link budget, Chart, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Turbo code, Frequency-shift keying, LPWA, biology, PHY-layer, 010401 analytical chemistry, 020206 networking & telecommunications, Turbo Code, biology.organism_classification, Low Rate, 0104 chemical sciences, Low SNR, Convolutional code, Bit error rate
Abstract: International audience; Low Power Wide Area (LPWA) networks aim at connecting low cost devices with high constraints on the link budget. Focusing on the physical layer, the combination of Frequency Shift Keying (FSK) modulation and coding in the same process has been shown efficient when associated to a turbo receiver. This paper considers the optimization of Turbo-FSK parameters for the LPWA context using the EXtrinsic Information Transfer (EXIT) Chart analysis. After adapting the metric to the FSK waveforms, EXIT chart performance results are extended and compared to short packet lengths using extensive Bit Error Rate (BER) computations.
Published: 2016
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26. Performance of soft-decision linear receivers for spatial-multiplexing FBMC/OQAM

Author: Jean-Baptiste Dore, David Demmer, Didier Le Ruyet, and Robin Gerzaguet
Subjects: Computer science, Wireless network, 05 social sciences, Equalization (audio), 050801 communication & media studies, 020206 networking & telecommunications, 02 engineering and technology, Spectral efficiency, Filter bank, Precoding, Spatial multiplexing, 0508 media and communications, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Polyphase system, Decoding methods, Computer Science::Information Theory
Abstract: With the increasing demand for mobile data traffic, enhanced frequency localized transmissions are considered for the generation of wireless networks to come. Filter Bank Multi-Carrier modulation, with the use of Offset-QAM, proves to be an interesting candidate to satisfy those spectrum constraints. Contrary to CP-OFDM, FBMC does not use any CP. Its spectral efficiency is improved but it also weakens the transmissions over highly frequency selective channels. Complex detection stage based on precoding or multi-tap equalization is thus necessary to prevent orthogonality losses. Another solution can be the use of the Frequency-Spreading scheme which improves the frequency resolution. In this paper, we propose to extend probabilistic decoding to linear FBMC receivers. The performances of the two common FBMC receiver structures, PolyPhase Network and Frequency-Spreading, are assessed over frequency-selective LTE channel models. The analytical formulae of the likelihood metrics are also derived.
Published: 2016
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27. Implementation and analysis of a Turbo-FSK transceiver for a new Low Power Wide Area physical layer

Author: Vincent Berg, Jean-Baptiste Dore, Jeremy Estavoyer, and Yoann Roth
Subjects: Frequency-shift keying, biology, business.industry, Computer science, Turbo, Physical layer, 020206 networking & telecommunications, 02 engineering and technology, biology.organism_classification, Transmitter power output, 01 natural sciences, Link budget, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Turbo code, Electronic engineering, Radio frequency, Transceiver, 010306 general physics, business, Computer network
Abstract: Low Power Wide Area networks aim at connecting low cost devices with high constraints on the link budget. Focusing on the physical layer, the combination of orthogonal modulation and coding in the same process has been shown efficient when associated with a turbo receiver. This work shows how this scheme, based on frequency shift keying modulation, can be efficiently implemented on today low-end platform based on a flexible radio frequency semiconductor component combined with a low power microcontroller. A link budget improvement of 4.6dB is demonstrated with a low-end receiver, enabling a coverage extension by a factor of 1.78 or a reduction of the transmit power by a factor 3, while keeping the same quality of service.
Published: 2016
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28. A Comparison of Physical Layers for Low Power Wide Area Networks

Author: Laurent Ros, Yoann Roth, Jean-Baptiste Dore, Vincent Berg, 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), GIPSA - Communication Information and Complex Systems (GIPSA-CICS), Département Images et Signal (GIPSA-DIS), Grenoble Images Parole Signal Automatique (GIPSA-lab ), 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 [2016-2019] (UGA [2016-2019])-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 [2016-2019] (UGA [2016-2019])-Grenoble Images Parole Signal Automatique (GIPSA-lab ), and 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 [2016-2019] (UGA [2016-2019])-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 [2016-2019] (UGA [2016-2019])
Subjects: Machine-to-Machine, Computer science, Turbo, Low Power Wide Area LPWA, Internet of Things, 050801 communication & media studies, 02 engineering and technology, PHY- layer, FSK, 0508 media and communications, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, 0202 electrical engineering, electronic engineering, information engineering, Turbo code, Electronic engineering, Sensitivity (control systems), Frequency-shift keying, biology, 05 social sciences, Physical layer, 020206 networking & telecommunications, Turbo Code, biology.organism_classification, Low Rate, Power (physics), Low SNR, Machine to machine, Efficient energy use
Abstract: International audience; In Low Power Wide Area networks, terminals are expected to be low cost, low power and able to achieve successful communication at long range. Communication should be low rate compared to cellular mobile networks. Most of the current technologies dedicated to Machine-to-Machine communication rely on the use of a spreading factor to achieve low levels of sensitivity. To contain power consumption at the terminal side, the cost of complexity should be paid by the receiving side. We propose to use turbo processing schemes as potential physical layers. We compare these schemes to a standard and an industrial solution, and show that a significant gain in sensitivity can be achieved, and very energy efficient scheme can be designed by mixing turbo processing and orthogonal modulation concepts.
Published: 2016
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29. 5G Cellular Networks with Relaxed Synchronization: Waveform Comparison and New Results

Author: Dimitri Ktenas, Jean-Baptiste Dore, and Robin Gerzaguet
Subjects: Computer science, Orthogonal frequency-division multiplexing, Air interface, 05 social sciences, 050801 communication & media studies, 020206 networking & telecommunications, 02 engineering and technology, Spectral efficiency, 0508 media and communications, Robustness (computer science), 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Cellular network, Waveform, Frequency modulation, 5G
Abstract: 5G will have to cope with a high degree of heterogeneity in terms of services and requirements. Flexible and efficient use of all available spectrums for different network deployment scenarios is one challenge for the future 5G. To maximize spectrum efficiency, the 5G air interface technology will also need to be flexible and capable of mapping various services to the best suitable combinations of frequency and time resources. In this work, we study and fairly compare the performance of different waveforms (UFMC, FBMC, and legacy LTE waveforms) in cellular networks with relaxed synchronization. First, a unified frame structure is discussed to introduce the context. Then we compare the robustness of the waveform contenders in the envisaged scenario. Based on these results, a bit loading algorithm is proposed to cope with the non-uniform distribution of the interference across the carriers in order to increase the spectral efficiency.
Published: 2016
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30. ISO/IEC 14443 VHBR: influence of the proximity antennas on the PCD-to-PICC data link performance

Author: Vincent Berg, Jean-Baptiste Dore, and Francois Frassati
Subjects: Intersymbol interference, Engineering, Transmission (telecommunications), business.industry, Electrical engineering, Electronic engineering, Minimum-shift keying, Antenna (radio), business, Amplitude-shift keying, Quadrature amplitude modulation, Amplitude and phase-shift keying, Phase-shift keying
Abstract: The demand for faster transmission rates in radio frequency identification has led to the adoption of phase-shiftkeying (PSK) modulations for the communication between the proximity coupled device (PCD) and the proximity integrated circuit card (PICC). This paper derives a transmission model to analyze the intersymbol interference generated by the PCD-to-PICC coupled antennas. An equalizer structure is then introduced and performance compared against previous generations of very-high bit rate systems using amplitude shift keying. It concludes that PSK modulations proposed for VHBR can be robust even when the resonance of the antenna circuits is relatively high.
Published: 2015
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31. Turbo-FSK: A new uplink scheme for low power wide area networks

Author: Yoann Roth, Vincent Berg, Jean-Baptiste Dore, Laurent Ros, GIPSA - Communication Information and Complex Systems (GIPSA-CICS), Département Images et Signal (GIPSA-DIS), Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), 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), IEEE, Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), and Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)
Subjects: IoT, Machine-to-Machine, Computer science, Low Power Wide Area, Internet of Things, Turbo code, 050801 communication & media studies, 02 engineering and technology, Channel capacity, FSK, 0508 media and communications, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Telecommunications link, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, M2M, Frequency-shift keying, LPWA, Network packet, Channel Capacity, 05 social sciences, Transmitter, 020206 networking & telecommunications, Shannon's limit, Low SNR, Low rate, Transmission (telecommunications), Bit error rate
Abstract: International audience; The Internet of Things aims to connect several billions of devices. Terminals are expected to be low cost, low power, and able to achieve successful communication at long range. While current Machine-to-Machine technologies tend to use spreading factors to meet the required specifications, we propose a more sophisticated use of redundant waveforms in a scheme called Turbo-FSK. This scheme involves Frequency-Shift-Keying (FSK) modulation at the transmission, and a turbo-decoder dedicated to the FSK waveforms at the receiver. Highly robust communication is achieved with a mere transmitter, as complexity is deported on the receiver side. Results are compared to common modulations using spreading factors, a significant gain in performance is achieved even with small packet sizes.
Published: 2015
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32. Optimizing contention based access methods for FBMC waveforms

Author: Vincent Berg, Jean-Baptiste Dore, Baher Mawlawi, Mawlawi, Baher, 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), 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), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)
Subjects: Carrier sense multiple access/collision avoidance (CSMA/CA), MAC, business.industry, Orthogonal frequency-division multiplexing, Computer science, Network packet, Cross Layer studies, [SPI] Engineering Sciences [physics], ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Physical layer, Spectral efficiency, [INFO] Computer Science [cs], Filter bank, [SPI]Engineering Sciences [physics], FBMC, Electronic engineering, Adjacent channel, multicarrier, Waveform, [INFO]Computer Science [cs], business, PHY, Carrier sense multiple access with collision avoidance, Computer network
Abstract: International audience; Filter Bank MultiCarrier modulation (FBMC) is a promising waveform technology envisaged for future mobile communication networks. For many transmission scenarios, the combination of multiple non-contiguous spectrum bands is foreseen. Because of coexistence issues, very low Adjacent Channel Leakage is required making FBMC waveforms of particular interest. However the fair frequency localization of FBMC results in a time spreading of the waveform: the filter impulse response introduces transitions which increase the duration of the burst with respect to classical multicarrier schemes such as Orthogonal Frequency Division Multiplexing and may reduce the overall spectral efficiency. In this work, we propose to study the performance of a FBMC waveform considering Carrier Sense Multiple Access with Collision Avoidance. Two mechanisms are employed for packet transmission: a basic access and a reservation scheme (based on RTS/CTS). We study how effective the RTS/CTS handshake is under ideal channel conditions by taking into account the specificities of the FBMC physical layer. Furthermore, we discuss about the RTS threshold value on packet size that maximizes throughput performance by employing one of both possible schemes and the impact of subchannel aggregation strategies on throughput and latency.
Published: 2015

33. 5GNOW: Intermediate frame structure and transceiver concepts

Author: Ivan Gaspar, Nicola Michailow, Bertalan Eged, Marcin Dryjanski, Martin Kasparick, Jean-Baptiste Dore, Slawomir Pietrzyk, Frank Schaich, Peter Vago, Andreas Festag, Mateusz Buczkowski, Luciano Leonel Mendes, Nicolas Cassiau, Gerhard Wunder, Vincent Berg, Maximilian Matthe, Gerhard Fettweis, Yejian Chen, Dimitri Ktenas, and Thorsten Wild
Subjects: Transmission (telecommunications), Computer science, Network packet, Asynchronous communication, Interface (Java), Air interface, Real-time computing, Frame (networking), Broadband, Electronic engineering, Transceiver, Random access
Abstract: This paper reports intermediate transceiver and frame structure concepts and corresponding results from the European FP7 research project 5GNOW. The core is the unified frame structure concept which supports an integrated 5G air interface, capable of dealing both with broadband data services and small packet services within the same band. It is essential for this concept to introduce waveforms which are more robust than OFDM, e.g., with respect to time-frequency misalignment. Encouraging candidate waveform technologies are presented and discussed with respective results. This goes along with the corresponding multiple access technologies using multi-layered signals and advanced multi-user receivers. In addition we introduce new (compressive) random access strategies to enable "one shot transmission" with greatly reduced control signaling particularly for sporadic traffic by orders of magnitude. Finally, we comment on the recent results on the 5GNOW networking interface. The intermediate results of 5GNOW lay the ground for the standardization path towards a new 5G air interface beyond LTE-A.
Published: 2014
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34. Performance of FBMC Multiple Access for relaxed synchronization cellular networks

Author: Dimitri Ktenas, Jean-Baptiste Dore, and Vincent Berg
Subjects: Frequency-division multiple access, Orthogonal frequency-division multiplexing, Computer science, Wireless network, business.industry, Synchronization, Asynchronous communication, Modulation, Frequency domain, Telecommunications link, Computer Science::Networking and Internet Architecture, Cellular network, Electronic engineering, business, Computer Science::Information Theory, Computer network, Power control, Communication channel
Abstract: Relaxed synchronization and access to fragmented spectrum are considered essential for future generations of wireless networks in order to reduce physical channel signaling. Frequency Division Multiple Access for Filter Bank Multicarrier (FBMC) modulation provides promising performance without strict synchronization requirements contrary to conventional Orthogonal Frequency Division Multiplexing (OFDM). In this paper, the architecture of a FBMC receiver suitable for this scenario is considered and its performance is compared against OFDM. The maximum achievable capacity of an asynchronous uplink transmission is analyzed when limited amount of feedback information on timing misalignment and power control is available. The proposed receiver architecture based on frequency domain processing combined with the fair frequency localization of the FBMC prototype filter provides an architecture that allows for more efficient multiuser asynchronous reception compared to OFDM.
Published: 2014
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35. A Multiuser FBMC Receiver Implementation for Asynchronous Frequency Division Multiple Access

Author: Vincent Berg, Dominique Noguet, and Jean-Baptiste Dore
Subjects: Frequency-division multiple access, Orthogonal frequency-division multiplexing, Computer science, Asynchronous communication, Wireless network, Synchronization (computer science), Real-time computing, Equalization (audio), Cellular network, Electronic engineering, Overhead (computing)
Abstract: Relaxed synchronization is considered essential for future generations of wireless networks in order to reduce signaling overhead. Filterbank Multicarrier (FBMC) modulation receivers may be implemented in the frequency domain as synchronization and equalization may be performed jointly. Furthermore it is demonstrated that FBMC exhibits better capacity than OFDM when frequency division multiple access with relaxed synchronization is considered. The FPGA implementation of a flexible multiuser FBMC receiver in this context is then described. Its complexity is finally analyzed. The proposed multiuser architecture complexity scales reasonably with the number of addressed users in parallel.
Published: 2014
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36. A Flexible FS-FBMC Receiver for Dynamic Access in the TVWS

Author: Vincent Berg, Jean-Baptiste Dore, and Dominique Noguet
Subjects: Cognitive radio, Interference (communication), Computer science, Orthogonal frequency-division multiplexing, White spaces, Electronic engineering, Polyphase system, Overhead (computing), Transceiver, Filter bank
Abstract: Filterbank multicarrier modulation (FBMC) has been identified as a strong contender for dynamic spectrum access in the TV White Space, as FBMC transceivers are able to control out-of-band interference level without compromising flexible usage. This paper compares FBMC receiver architectures, providing performance and complexity analysis, based on closed form expressions and on an actual implementation. Polyphase network (PPN-) and frequency spreading (FS-) FBMC receiver structures are discussed. The FS-FBMC structure is selected for hardware implementation and compared with OFDM. It is shown that complexity overhead is limited when hardware resource sharing techniques are exploited.
Published: 2014
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37. A Flexible Radio Transmitter for TVWS Based on FBMC

Author: Vincent Berg, Jean-Baptiste Dore, and Dominique Noguet
Subjects: Cognitive radio, Ultra high frequency, Transmission (telecommunications), Computer science, business.industry, Orthogonal frequency-division multiplexing, White spaces, Transmitter, Electronic engineering, Wireless, Digital radio, business, Computer network
Abstract: In this paper a flexible radio approach for opportunistic access to the television white space (TVWS) is presented. Requirement stems from the coexistence scheme used in this band between opportunistic transmission and TV broadcast signals (or wireless microphones). To ensure non harmful interference of the TVWS signal on the incumbent services, a high adjacent leakage power ratio (ACLR) is expected. Also, flexibility is required to address the vacant channels in the UHF spectrum. Flexibility and low ACLR specifications are difficult to obtain simultaneously. The approach proposed in this paper is based on filter bank multi-carrier modulation (FBMC) scheme and a flexible hardware platform that combines RF agility and the digital filtering capability of FBMC. The hardware implementation validates that both flexibility and ACLR performance of the system are preserved even when off-the-shelf components impairments are considered. An experimental setup validates the coexistence with a TV broadcast signal and a comparison with a classical approach shows the gain in performance.
Published: 2013
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38. MLSE detector for beyond VHBR contactless air interface

Author: Nadjah Touati, Florian Pebay-Peyroula, and Jean-Baptiste Dore
Subjects: Engineering, business.industry, Air interface, Detector, Maximum likelihood sequence estimation, Viterbi algorithm, symbols.namesake, Intersymbol interference, Interference (communication), symbols, Electronic engineering, business, Phase modulation, Phase-shift keying
Abstract: We investigate the problem of sequence detection in a non linear channel for a contactless air interface. The work presented in this study is based on the the VHBR (Very High Bit-Rate) amendments of the ISO 14443 international standard. We focused more particularly on the part of the standard extension that defines the phase modulation (PSK) from the Proximity Coupling Device (PCD) to the Passive Inductive Coupled Card (PICC). We propose an efficient detector to overcome both Inter Symbol Interference (ISI) due to the high data rates, and system non linearities introduced by the differential detection at the receiver side. The proposed detector is an adaptation of the Viterbi algorithm for constraint-ternary alphabet. Our numerical results show that a rate of 13.56 Mbps can be achieved using a 15-states sequence detector.
Published: 2012
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39. The 5G candidate waveform race: a comparison of complexity and performance

Author: Michael Färber, Miquel Payaro, Vincent Berg, Oriol Font-Bach, Xavier Mestre, Kilian Roth, Nikolaos Bartzoudis, Robin Gerzaguet, Dimitri Ktenas, Jean-Baptiste Dore, and Leonardo Gomes Baltar
Subjects: GFDM, Computer science, Orthogonal frequency-division multiplexing, Computer Networks and Communications, Air interface, Real-time computing, 020206 networking & telecommunications, Waveform, UFMC, FBMC, 02 engineering and technology, Spectral efficiency, Computer Science Applications, Asynchronous communication, Signal Processing, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, 020201 artificial intelligence & image processing, 5G, OFDM
Abstract: 5G will have to cope with a high degree of heterogeneity in terms of services and requirements. Among these latter, the flexible and efficient use of non-contiguous unused spectrum for different network deployment scenarios is considered a key challenge for 5G systems. To maximize spectrum efficiency, the 5G air interface technology will also need to be flexible and capable of mapping various services to the best suitable combinations of frequency and radio resources. In this work, we propose a comparison of several 5G waveform candidates (OFDM, UFMC, FBMC and GFDM) under a common framework. We assess spectral efficiency, power spectral density, peak-to-average power ratio and robustness to asynchronous multi-user uplink transmission. Moreover, we evaluate and compare the complexity of the different waveforms. In addition to the complexity analysis, in this work, we also demonstrate the suitability of FBMC for specific 5G use cases via two experimental implementations. The benefits of these new waveforms for the foreseen 5G use cases are clearly highlighted on representative criteria and experiments.
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40. FBMC receiver for multi-user asynchronous transmission on fragmented spectrum

Author: Nicolas Cassiau, Dimitri Ktenas, Vincent Berg, and Jean-Baptiste Dore
Subjects: Equalization, Frequency-division multiple access, Computer science, Orthogonal frequency-division multiplexing, Real-time computing, Equalization (audio), 020302 automobile design & engineering, 020206 networking & telecommunications, 02 engineering and technology, Delay spread, 0203 mechanical engineering, Modulation, Asynchronous communication, Frequency domain, Carrier frequency offset, 0202 electrical engineering, electronic engineering, information engineering, Baseband, Electronic engineering, Communication channel, Computer Science::Information Theory
Abstract: Relaxed synchronization and access to fragmented spectrum are considered for future generations of wireless networks. Frequency division multiple access for filter bank multicarrier (FBMC) modulation provides promising performance without strict synchronization requirements contrary to conventional orthogonal frequency division multiplexing (OFDM). The architecture of a FBMC receiver suitable for this scenario is considered. Carrier frequency offset (CFO) compensation is combined with intercarrier interference (ICI) cancellation and performs well under very large frequency offsets. Channel estimation and interpolation had to be adapted and proved effective even for heavily fragmented spectrum usage. Channel equalization can sustain large delay spread. Because all the receiver baseband signal processing functionalities are proposed in the frequency domain, the overall architecture is suitable for multiuser asynchronous transmission on fragmented spectrum.
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