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1. Design of Digital Communications for Strong Phase Noise Channels

Author

Simon Bicais and Jean-Baptiste Dore

Subjects
Sub-TeraHertz communications, phase noise, maximum likelihood detection, channel estimation, constellation, binary labeling, Transportation engineering, TA1001-1280, Transportation and communications, HE1-9990
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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2. On the Road to 5G: Comparative Study of Physical Layer in MTC Context

Author

Yahia Medjahdi, Sylvain Traverso, Robin Gerzaguet, Hmaied Shaiek, Rafik Zayani, David Demmer, Rostom Zakaria, Jean-Baptiste Dore, Mouna Ben Mabrouk, Didier Le Ruyet, Yves Louet, and Daniel Roviras

Subjects
Waveforms, 5G, MTC, OFDM, WOLA-OFDM, UF-OFDM, Electrical engineering. Electronics. Nuclear engineering, TK1-9971
Abstract

During the past few years, we are witnessing the emergence of 5G and its high-level performance targets. Waveform (WF) design is one of the important aspects for 5G that received considerable attention from the research community in recent years. To find an alternative to the classical orthogonal frequency division multiplexing (OFDM), several multicarrier approaches addressing different 5G technical challenges, have been proposed. In this paper, we focus on critical machine-type communications (C-MTC), which is one of the key features of the foreseen 5G system. We provide a comparative performance study of the most promising multicarrier WFs. We consider several C-MTC key performance indicators: out-of-band radiations, spectral efficiency, end-to-end physical layer latency, robustness to time and frequency synchronization errors, power fluctuation, and transceiver complexity. The investigated multicarrier WFs are classified into three groups based on their ability to keep the orthogonality: in the complex domain, e.g., most of the OFDM-inspired WFs, in the real domain like offset-quadrature amplitude modulation (QAM)-based techniques, and non-orthogonal WFs like generalized frequency division multiplexing and filter bank-based multicarrier-QAM. Finally, the performances of these WFs are thoroughly discussed in order to highlight their pros and cons and permit a better understanding of their capabilities in the context of C-MTC.

Published
2017
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3. DFT-s-OFDM for sub-THz Transmission -- Tracking and Compensation of Phase Noise

Author

Bello, Yaya, Jean-Baptiste-Doré, and Demmer, David

Subjects
Computer Science - Information Theory, Electrical Engineering and Systems Science - Signal Processing
Abstract

For future wireless communication technologies, an increase in capabilities such as throughput is strongly expected. Transmission in the sub-THz bands (>90 GHz) seems to be the potential solution to meet the ever-increasing capacity demands due to the large unexploited bandwidth. Oscillators used at these frequencies generate phase noise that induces critical distortions in the signal that must be addressed. The correlated nature of PN makes it difficult to overcome. Nowadays, there is a growing interest in considering the extension of multicarrier based waveforms of the 5G new radio for transmissions in the sub-THz bands. In this paper, we introduce a new algorithm called the interpolation filter (IF), which efficiently estimates and compensates PN effects on DFT-s-OFDM systems. Specifically, it is based on the use of stochastic properties of the PN and is compatible with the 3GPP phase tracking reference signal scheme. We highlight a performance improvement over known techniques when using high-order modulation., Comment: Paper accepted and will be presented at the IEEE CCNC 2023 Conference that will be held in Las Vegas from January 8th to 11th, 2023

Published
2022

6. Analysis of Gaussian phase noise effects in DFT-s-OFDM systems for sub-THz transmissions

Author

Yaya Bello, Jean-Baptiste Doré, and David Demmer

Subjects
Beyond 5G, 6G, 3GPP, Uncorrelated phase noise, Optimal detector, Channel performance evaluation, Telecommunication, TK5101-6720, Electronics, TK7800-8360
Abstract

Abstract The future generations of communication technologies envision the transmission of signals across the millimeter wave and sub-THz spectrums. However, the characteristics of the propagation channel at such high frequencies differ from what is observed in the conventional low-frequency spectrum with for instance, the apparition of stronger phase noise (PN) induced by the Radio Frequency (RF) transceivers and more especially by the oscillators. That is why there is growing interest in evaluating and adapting the 5G new radio (5G-NR) physical layer to the presence of PN. This article is dedicated to the study of discrete Fourier transform-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) under uncorrelated Gaussian PN (GPN) impairments. We show that the presence of GPN induces two distortions: (i) a frequency-dependent random rotation of data, namely the subcarrier phase error (SPE) and (ii) a frequency-dependent intercarrier interference (ICI) that are analytically expressed. Then, we investigate the design of the adapted and optimal detection criterion according to the baseband model we derived in this paper. We demonstrate that (i) the proposed polar detector outperforms the conventional Euclidean detector and (ii) contrary to legacy OFDM, DFT-s-OFDM is a promising solution when strong GPN is involved.

Published
2024
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8. Toward 6G: From New Hardware Design to Wireless Semantic and Goal-Oriented Communication Paradigms

Author

Jean-Baptiste Dore, Emilio Calvanese Strinati, Didier Belot, and Alexis Falempin

Subjects
Networking and Internet Architecture (cs.NI), Signal Processing (eess.SP), FOS: Computer and information sciences, Goal orientation, business.industry, Computer science, Semantics, Computer Science - Networking and Internet Architecture, Paradigm shift, FOS: Electrical engineering, electronic engineering, information engineering, Design process, Wireless, Performance indicator, Electrical Engineering and Systems Science - Signal Processing, business, Design methods, Computer hardware, Design technology
Abstract

Several speculative visions are conjecturing on what 6G services will be able to offer at the horizon of 2030. Nevertheless, the 6G design process is at its preliminary stages. The reality today is that hardware, technologies and new materials required to effectively meet the unprecedented performance targets required for future 6G services and network operation, have not been designed, tested or even do not exist yet. Today, a solid vision on the cost-benefit trade-offs of machine learning and artificial intelligence support for 6G network and services operation optimization is missing. This includes the possible support from hardware efficiency, operation effectiveness and, the immeasurable cost due to data acquisition-transfer-processing. The contribution of this paper is three-fold. This is the first paper deriving crucial 6G key performance indicators on hardware and technology design. Second, we present a new hardware technologies design methodology conceived to enable the effective software-hardware components integration required to meet the challenging performance envisioned for future 6G networks. Third, we suggest a paradigm shift towards goal-oriented and semantic communications, in which a totally new opportunity of joint design of hardware, artificial intelligence and effective communication is offered. The proposed vision is consolidated by our recent results on hardware, technology and machine learning performance., Comment: ESSCIRC

Published
2021
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9. Aggregated Massive Modular Paradigm: A 6G Telecom Infrastructure Vision

Author

L. Petit, Claude Brocheton, Dimitri Ktenas, Eric Mercier, Julien Legrand, and Jean-Baptiste Dore

Subjects
Networking and Internet Architecture (cs.NI), FOS: Computer and information sciences, Modularity (networks), Cost effectiveness, business.industry, Computer science, Perspective (graphical), Modular design, Computer Science - Networking and Internet Architecture, Software deployment, Telecom infrastructure sharing, Telecommunications, business, Throughput (business)
Abstract

On the eve of 5G network deployment worldwide, a new boom in the mass digitization of our personal and professional lifestyles is looming. 5G marks a strong shift in the way in which connectivity will impact our societies and industries. This shift is taking place through a combination of technologies that have progressed business-as-usual with technical improvements. The future of 5G, already called 6G, currently belongs to the world of research, which must imagine the future development of mobile digital services in 10 years. In this ever more connected world, ownership of data and protection, control of ecological impact, both energetic and electromagnetic, in addition to guarantee an available, flexible network will be essential factors in the success of 6G. This new generation of networks brings along great challenges in terms of modularity, cost effectiveness and power efficiency. We present here a novel disruptive deployment strategy using cost-efficient modules along with aggregated connectivity meeting these requirements.

Published
2020
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10. Satellite and terrestrial multi-connectivity for 5G: making spectrum sharing possible

Author

Stephan Jaeckel, Jean-Michel Houssin, Laurent Combelles, Junhyeong Kim, Marc Laugeois, Gosan Noh, Nicolas Cassiau, Leszek Raschkowski, Jean-Baptiste Dore, Marjorie Thary, 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), Electronics and Telecommunications Research Institute [DaeJeon] (ETRI), Fraunhofer Institute for Telecommunications - Heinrich Hertz Institute (Fraunhofer HHI), Fraunhofer (Fraunhofer-Gesellschaft), Thales Alenia Space, Thales Alenia Space [Toulouse] (TAS), and THALES [France]

Subjects
Beamforming, [SPI.OTHER]Engineering Sciences [physics]/Other, Computer science, Distributed computing, 020208 electrical & electronic engineering, Physical layer, 020206 networking & telecommunications, Context (language use), 02 engineering and technology, Spectral efficiency, Radio spectrum, Shared resource, Interference (communication), 0202 electrical engineering, electronic engineering, information engineering, Radio resource management, Spectrum sharing, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract

International audience; This paper reports the first results of the 5G-ALLSTAR project [1] aiming at providing solutions and enablers for spectrum sharing in a 5G cellular and satellite multi-connectivity context. First, we present an exhaustive study of the frequency bands eligible for these systems in the short and medium term. A ray-tracing based and a geometry-based stochastic channel models developed in the project are then described. These models can be used to simulate systems involving terrestrial and non-terrestrial networks. We then describe three different ways investigated in the project for managing interference: signal processing (hardware implementation of a 5G New Radio compatible physical layer), beamforming (steering and switching beams in order to avoid the interference while preserving the spectral efficiency) and radio resource management (tool designed for joint optimization of satellite and terrestrial resource sharing).

Published
2020

11. 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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12. Technology Roadmap for Beyond 5G Wireless Connectivity in D-band

Author

Jean-Baptiste Dore, Simon Bicais, Benoit Miscopein, Yoann Corre, Dimitri Ktenas, Gregory Gougeon, Eric Mercier, Emilio Calvanese Strinati, Didier Belot, 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, ANR-17-CE25-0013,BRAVE,Retour à la modulation monoporteuse pour des communications beyond-5G au-delà de 90GHz(2017), Doré, Jean-Baptiste, and Retour à la modulation monoporteuse pour des communications beyond-5G au-delà de 90GHz - - BRAVE2017 - ANR-17-CE25-0013 - AAPG2017 - VALID

Subjects
business.product_category, Computer science, [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, 02 engineering and technology, Interactive kiosk, 01 natural sciences, Integrated circuit technology, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Bandwidth (computing), Radiofrequency integrated circuits, Wireless, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing, 010302 applied physics, business.industry, Wireless network, Millimeter wave communications, 020206 networking & telecommunications, Backhaul (telecommunications), Extremely high frequency, Technology roadmap, business, Telecommunications, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, 5G
Abstract

International audience; Wireless communication in millimeter wave bands, namely above 20 GHz and up to 300 GHz is foreseen as a key enabler technology for the next generation of wireless systems. The huge available bandwidth is contemplated to achieve high data rate wireless communications, and hence, to fulfill the requirements of future wireless networks. Several Beyond 5G applications are considered for these systems: high capacity back-haul, enhanced hot-spot kiosk as well as short-range Device-to-Device communications. In this paper we propose to discuss the trade-offs between scenario requirements and current silicon technologies limits to draw a technology roadmap for the next generation of wireless connectivity in D-band.

Published
2020

13. 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

14. IEEE 1900.7 Standard for White Space Dynamic Spectrum Access Radio Systems

Author

Hiroshi Harada, Oliver Holland, Dominique Noguet, Fumihide Kojima, Muhammad Zeeshan Shakir, Baher Mawlawi, Stanislav Filin, and Jean-Baptiste Dore

Subjects
Wireless intrusion prevention system, Inter-Access Point Protocol, Computer Networks and Communications, Computer science, Orthogonal frequency-division multiplexing, 02 engineering and technology, Radio spectrum, IEEE 802.11, White spaces, 0202 electrical engineering, electronic engineering, information engineering, Wireless, Electrical and Electronic Engineering, Access network, business.industry, 020208 electrical & electronic engineering, Transmitter, Physical layer, 020206 networking & telecommunications, Computer Science Applications, Cognitive radio, Media access control, Key (cryptography), IEEE 802.11e-2005, Telecommunications, business, Computer network
Abstract

Various measurements and studies have shown that some licensed frequency bands are underutilized at certain times and in certain locations. In particular, TV bands have been shown to have unused spectrum. Such observations have triggered strong interest in white space dynamic spectrum access among researchers, wireless equipment manufacturers, and standards development organizations. The IEEE Standards Committee on Dynamic Spectrum Access Networks has created the White Space Radio Working Group in June 2011 to develop the IEEE 1900.7 standard for white space dynamic spectrum access radio systems. The draft of this standard is now finalized and ready for review by a broad audience during the sponsor ballot procedure. This paper gives an overview of key concepts and technologies of the draft standard P1900.7, including its use cases and requirements, its physical layer and MAC sub-layer.

Published
2018
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15. 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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16. 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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17. 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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18. Phase Noise Model Selection for Sub-THz Communications

Author

Simon Bicais, Jean-Baptiste Dore, BICAIS, Simon, 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)), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)

Subjects
Computer science, Terahertz radiation, Gaussian distribution, Link adaptation, Wiener Phase Noise, 02 engineering and technology, Topology, symbols.namesake, 0502 economics and business, Phase noise, 0202 electrical engineering, electronic engineering, information engineering, Wireless, Oscillator, Gaussian process, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing, business.industry, Model selection, 05 social sciences, Sub-THz communications, 020206 networking & telecommunications, Expression (mathematics), Uncorrelated, [SPI.TRON] Engineering Sciences [physics]/Electronics, Exponential function, [SPI.TRON]Engineering Sciences [physics]/Electronics, Face (geometry), symbols, business, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, 050203 business & management
Abstract

International audience; To face the exponential data traffic growth, the sub-THz spectrum (100-300 GHz) is envisioned for wireless communications. However, sub-THz systems are critically im-pacted by the strong phase noise of high frequency oscillators. This paper discusses the appropriate choice of phase noise model for sub-THz communications. Two phase noise models are introduced and compared: one correlated, accurate but complex, and another uncorrelated, analytically simpler. The expression of the likelihood ratio enables us to propose an analytical condition to select the best of the two models for a measured oscillator spectral characteristic. Numerical simulations are performed with realistic phase noise generated according to a state-of-the-art sub-THz oscillator and show that an uncorrelated Gaussian process is appropriate to model the impact of phase noise in sub-THz systems. Eventually, the proposed results are applied to link adaptation in the presence of phase noise in order to choose the most robust scheme between a coherent and a differential modulation.

Published
2019

19. 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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20. On the Optimum Demodulation in the Presence of Gaussian Phase Noise

Author

Simon Bicaas, Jose Luis Gonzalez Jimenez, 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), Laboratoire d'Electronique et des Technologies de l'Information ( CEA-LETI ), Université Grenoble Alpes [Saint Martin d'Hères]-Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), Doré, Jean-Baptiste, and BICAIS, Simon

Subjects
[SPI] Engineering Sciences [physics], Computer science, Gaussian, Channel estimation, 02 engineering and technology, [ SPI.SIGNAL ] Engineering Sciences [physics]/Signal and Image processing, 01 natural sciences, symbols.namesake, [SPI]Engineering Sciences [physics], Signal-to-noise ratio, 0103 physical sciences, Phase noise, 0202 electrical engineering, electronic engineering, information engineering, Demodulation, 010306 general physics, Maximum likelihood detection, [SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing, Computer Science::Information Theory, Maximum likeli- hood detection, Millimeter wave, 020206 networking & telecommunications, [SPI.TRON] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics, Metric (mathematics), symbols, Complete metric space, Algorithm, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Decoding methods, Communication channel
Abstract

International audience; —Millimeter-wave systems appears to be one of the foremost solutions to face the exponential growth of the data traffic. Yet, their performance are severely degraded by oscilla-tors phase noise. This paper addresses the design of optimum receivers affected by phase noise. We first derive the optimum decision metric for symbol detection under the assumption of a Gaussian phase noise and a high signal-to-noise ratio. In contrast to state-of-the-art approaches, we propose to represent within a complete metric space the demodulation over the phase noise channel. The provided framework enables the use of efficient algorithms to perform the demodulation. Computable probabilistic demapper values are derived upon the optimum metric to implement soft channel decoding. This work shows that knowledge of the channel statistics can be capitalized to enhance performance of both coded and uncoded systems. Eventually, we propose the necessary channel estimation scheme and evaluate the performance degradation due to estimation errors.

Published
2018

21. 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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22. 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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23. 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

24. 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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25. 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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26. 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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27. 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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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. CSMA/CA with RTS/CTS overhead reduction for M2M Communication with Finite Retransmission Strategy

Author

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
[INFO.INFO-NI] Computer Science [cs]/Networking and Internet Architecture [cs.NI], Hidden node problem, Computer science, business.industry, Network packet, Retransmission, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Real-time computing, Throughput, Scheduling (computing), [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Multiple Access with Collision Avoidance for Wireless, business, Random access, Carrier sense multiple access with collision avoidance, Computer network, Communication channel
Abstract

International audience; —The number of Machine to Machine (M2M) applications is increasing rapidly especially in cellular communication systems. These applications should support a very high number of stations (STAs) and facilitate communication without any human intervention. To fulfill these requirements random access protocols are a possible choice. Carrier sense multiple access collision avoidance (CSMA/CA) protocol with request to send and clear to send (RTS/CTS) mechanism presents high degradation of the throughput and packet drop probability performance especially when the packets size are small. The medium access control (MAC) overhead caused by the RTS and CTS messages is high comparing to the total duration of successful transmission. In order to reduce the MAC overhead we propose in this work a new strategy to serve many users successively. This strategy consists on sending many RTS in parallel by different stations on different frequency sub-bands. Once the RTS messages do not collide with each other, there will be no need to resend the RTS and wait for a CTS to gain the channel access. In this paper, this proposed strategy is investigated and we demonstrate that it reaches better saturation throughput and packet drop probability especially in loaded networks. Index Terms—Multiband Carrier sense multiple access/collision avoidance (M-CSMA/CA), throughput, MAC protocol, scheduling, M2M, overhead reduction, finite retransmission, packet drop probability.

Published
2015
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30. 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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31. CSMA/CA with RTS-CTS Overhead Reduction for M2M Communication

Author

Baher Mawlawi, Jean-Marie Gorce, Jean-Baptiste Dore, Nikolai Lebedev, Software and Cognitive radio for telecommunications (SOCRATE), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-CITI Centre of Innovation in Telecommunications and Integration of services (CITI), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA), 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 de Lyon-Institut National des Sciences Appliquées (INSA), École Supérieure de Chimie Physique Électronique de Lyon (CPE), IEEE, and École supérieure de Chimie Physique Electronique de Lyon (CPE)

Subjects
business.industry, Computer science, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Local area network, overhead reduction, Access control, Throughput, multiband, Scheduling (computing), MAC protocol, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Multiple Access with Collision Avoidance for Wireless, Wireless, Mobile telephony, scheduling, M2M, business, Carrier sense multiple access with collision avoidance, throughput, Computer network, Communication channel
Abstract

International audience; —Machine to machine communication (M2M) or machine type communication (MTC) facilitates communication without any human intervention. These applications will support an enormous number of stations (STAs). To mitigate degradation of the throughput and delay performance in wireless local area networks (WLAN) that employ carrier sense multiple access collision avoidance (CSMA/CA) protocol with request to send and clear to send (RTS/CTS) mechanism, we propose to reduce the overhead introduced by the hand shake mechanism. The medium access control (MAC) overhead caused by the RTS and CTS messages is high comparing to the total duration of successful transmission. In order to reduce the MAC overhead we propose in this work a new strategy to serve many users successively. This strategy consists on sending many RTS in parallel by different stations on different frequency sub-bands. Once the RTS messages do not collide with each other, there will be no need to resend the RTS and wait for a CTS to gain the channel access. In this paper, this proposed strategy is investigated and we demonstrate that it reaches better saturation throughput and delay especially in loaded networks. Index Terms—Carrier sense multiple access/collision avoidance (CSMA/

Published
2015

32. Multiband CSMA/CA with RTS-CTS strategy

Author

Nikolai Lebedev, Jean-Baptiste Dore, Baher Mawlawi, Jean-Marie Gorce, 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), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA), École Supérieure de Chimie Physique Électronique de Lyon (CPE), and École supérieure de Chimie Physique Electronique de Lyon (CPE)

Subjects
Networking and Internet Architecture (cs.NI), FOS: Computer and information sciences, Carrier sense multiple access/collision avoidance (CSMA/CA), business.industry, Computer science, Orthogonal frequency-division multiple access, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Throughput, Collision, multiband, MAC protocol, Frequency-division multiplexing, Computer Science::Performance, Computer Science - Networking and Internet Architecture, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Asynchronous communication, Computer Science::Networking and Internet Architecture, business, Collision avoidance, Carrier sense multiple access with collision avoidance, throughput, Computer network, Communication channel, Computer Science::Information Theory
Abstract

International audience; We present in this paper a new medium access control (MAC) scheme devoted to orthogonal frequency division multiple access (OFDMA) systems which aims at reducing collision probabilities during the channel request period. The proposed MAC relies on the classical carrier sense multiple access/collision avoidance (CSMA/CA) protocol with RTS / CTS ("Request To Send" / "Clear To Send") mechanism. The proposed method focus on the collision probability of RTS messages exploiting a multi-channel configuration for these messages while using the whole band for data transmissions. The protocol may be interpreted as an asynchronous frequency multiplexing of RTS messages. This method achieves strong performance gains in terms of throughput and latency especially in crowded networks. Index Terms—Carrier sense multiple access/collision avoidance (CSMA/CA), multiband, throughput, MAC protocol.

Published
2015
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33. 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

34. Analysis of Frequency Channel Division Strategy for CSMA/CA with RTS/CTS Mechanism

Author

Jean-Marie Gorce, Baher Mawlawi, Jean-Baptiste Dore, Nikolai Lebedev, Software and Cognitive radio for telecommunications (SOCRATE), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-CITI Centre of Innovation in Telecommunications and Integration of services (CITI), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA), 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 de Lyon-Institut National des Sciences Appliquées (INSA), École Supérieure de Chimie Physique Électronique de Lyon (CPE), and École supérieure de Chimie Physique Electronique de Lyon (CPE)

Subjects
Computer science, RTS/CTS, lcsh:Technology, Carrier-sense multiple access, MAC protocol, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Engineering, lcsh:Technology (General), Frequency channel division, Multiple Access with Collision Avoidance for Wireless, Electrical and Electronic Engineering, Collision avoidance, lcsh:T, business.industry, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Carrier senses multiple access/collision avoidance (CSMA/CA), Division (mathematics), Collision, Saturation throughput, Control and Systems Engineering, lcsh:T1-995, business, Carrier sense multiple access with collision avoidance, Communication channel, Computer network
Abstract

International audience; —In this work we study the collision probability, saturation throughput and statistical delay for the carrier sense multiple access collision avoidance (CSMA/CA) protocol with request to send and clear to send (RTS/CTS) mechanism in the case of frequency channel division. We propose in this paper a modified version of CSMA/CA-RTS/CTS to be compatible with the channel repartition technique and we prove that an important gain is introduced in terms of system performance especially for loaded networks. Simulations highlight that dividing the channel into independent sub-channels reduces drastically the RTS collision probability. Moreover, a gain in terms of saturation throughput and delay is shown especially in dense networks. Index Terms—Carrier senses multiple access/collision avoid-ance (CSMA/CA), Frequency channel division, RTS/CTS, MAC protocol.

Published
2014

35. 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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36. CSMA/CA Bottleneck Remediation in Saturation Mode with New Backoff Strategy

Author

Baher Mawlawi, Jean-Baptiste Dore, Software and Cognitive radio for telecommunications (SOCRATE), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-CITI Centre of Innovation in Telecommunications and Integration of services (CITI), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA), 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 Université de Lyon-Institut National des Sciences Appliquées (INSA)

Subjects
Networking and Internet Architecture (cs.NI), FOS: Computer and information sciences, Carrier sense multiple access/collision avoidance (CSMA/CA), Exponential backoff, Markov chain, business.industry, Wireless network, Computer science, delay, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Access control, Bottleneck, Term (time), Computer Science - Networking and Internet Architecture, backoff algorithm, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Overhead (computing), business, Carrier sense multiple access with collision avoidance, throughput, Computer network
Abstract

International audience; Many modern wireless networks integrate carrier sense mul-tiple access/collision avoidance (CSMA/CA) with exponential backoff as medium access control (MAC) technique. In order to decrease the MAC overhead and the collision probability, we propose in this paper a new backoff strategy leading to better saturation throughput and access de-lay performance comparing to the classical protocol. We investigate the CSMA/CA with RTS/CTS technique, and we show that our strategy reaches better saturation throughput and access delay especially in dense networks. This proposed strategy distributes users over all the backoff stages to solve the bottleneck problem present in the first backoff stage. Finally, we analyze our strategy and we compare it to the classical one modeled by Markov chain. Analytical and simulation results show the improvment in term of saturation throughput. Cumulative density func-tion (CDF) of the access delay illustrates the important gain obtained by the proposed strategy.

Published
2013
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37. Conflict resolution for pipelined layered LDPC decoders

Author

Laura Conde-Canencia, Emmanuel Boutillon, Cedric Marchand, Jean-Baptiste Dore, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (UMR 3192) (Lab-STICC), Université européenne de Bretagne - European University of Brittany (UEB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), NXP Semiconductors, Thèse CIFRE NXP, and Boutillon, Emmanuel

Subjects
Schedule, LDPC, ARCHITECTURE, Computer science, Multitier architecture, 020206 networking & telecommunications, 02 engineering and technology, Parallel computing, Travelling salesman problem, WiMAX, [SPI.TRON] Engineering Sciences [physics]/Electronics, 020202 computer hardware & architecture, Scheduling (computing), [SPI.TRON]Engineering Sciences [physics]/Electronics, Idle, Genetic algorithm, Digital Video Broadcasting, 0202 electrical engineering, electronic engineering, information engineering, Low-density parity-check code, Decoding methods, DVB-S2
Abstract

International audience; Many of the current LDPC implementations of DVB-S2, T2 or WiMAX standard use the so-called layered architecture combined with pipeline. However, the pipeline process may introduce memory access conflicts. The resolution of these conflicts requires careful scheduling combined with dedicated hardware and/or idle cycle insertion. In this paper, based on the DVB-T2 example, we explain explicitly how the scheduling can solve most of the pipeline conflicts. The two contributions of the paper are 1) how to split the matrix to relax the pipeline conflicts at a cost of a reduced maximum available parallelism 2) how to project the problem of the research of an efficient scheduling to the well-known "Travelling Salesman Problem" and use a genetic algorithm to solve it.

Published
2009

38. Conflict Resolution by Matrix Reordering for DVB-T2 LDPC Decoders

Author

Laura Conde-Canencia, Emmanuel Boutillon, Jean-Baptiste Dore, Cedric Marchand, Boutillon, Emmanuel, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (UMR 3192) (Lab-STICC), Université européenne de Bretagne - European University of Brittany (UEB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Brestois du Numérique et des Mathématiques (IBNM), Université de Brest (UBO)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), NXP Semiconductors, and CIFRE NXP

Subjects
LDPC, architecture, Computer science, 020206 networking & telecommunications, 02 engineering and technology, Parallel computing, Data_CODINGANDINFORMATIONTHEORY, Fixed point, dvb-s2, [SPI.TRON] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics, 020202 computer hardware & architecture, DVB-S2, Matrix (mathematics), Parity-check matrix, Digital Video Broadcasting, Diagonal matrix, 0202 electrical engineering, electronic engineering, information engineering, Low-density parity-check code, Parity (mathematics), Decoding methods
Abstract

International audience; Layered decoding is known to provide efficient and high-throughput implementation of LDPC decoders. However, the implementation of the layered architecture is not always straightforward because of the memory access conflicts in the a-posteriori information memory. In this paper, we focus our attention on a particular type of conflict introduced by the existence of multiple diagonal matrices in the DVB-T2 parity check matrix structure. We illustrate how the reordering of the matrix reduces the number of conflicts, at the cost of limiting the level of parallelism. We then propose a parity extending process to solve the remaining conflicts. Fixed point simulation results show coherent performance without modifying the layered architecture.

Published
2009

39. Machine type communications: key drivers and enablers towards the 6G era

Author

Nurul Huda Mahmood, Stefan Böcker, Ingrid Moerman, Onel A. López, Andrea Munari, Konstantin Mikhaylov, Federico Clazzer, Hannes Bartz, Ok-Sun Park, Eric Mercier, Selma Saidi, Diana Moya Osorio, Riku Jäntti, Ravikumar Pragada, Elina Annanperä, Yihua Ma, Christian Wietfeld, Martin Andraud, Gianluigi Liva, Yan Chen, Eduardo Garro, Frank Burkhardt, Chen-Feng Liu, Hirley Alves, Yalcin Sadi, Markus Kelanti, Jean-Baptiste Doré, Eunah Kim, JaeSheung Shin, Gi-Yoon Park, Seok-Ki Kim, Chanho Yoon, Khoirul Anwar, and Pertti Seppänen

Subjects
6G, E2E performance, Machine type communications, Random access, Ultra reliable low-latency communications, Zero-energy MTC, Telecommunication, TK5101-6720, Electronics, TK7800-8360
Abstract

Abstract The recently introduced 5G New Radio is the first wireless standard natively designed to support critical and massive machine type communications (MTC). However, it is already becoming evident that some of the more demanding requirements for MTC cannot be fully supported by 5G networks. Alongside, emerging use cases and applications towards 2030 will give rise to new and more stringent requirements on wireless connectivity in general and MTC in particular. Next generation wireless networks, namely 6G, should therefore be an agile and efficient convergent network designed to meet the diverse and challenging requirements anticipated by 2030. This paper explores the main drivers and requirements of MTC towards 6G, and discusses a wide variety of enabling technologies. More specifically, we first explore the emerging key performance indicators for MTC in 6G. Thereafter, we present a vision for an MTC-optimized holistic end-to-end network architecture. Finally, key enablers towards (1) ultra-low power MTC, (2) massively scalable global connectivity, (3) critical and dependable MTC, and (4) security and privacy preserving schemes for MTC are detailed. Our main objective is to present a set of research directions considering different aspects for an MTC-optimized 6G network in the 2030-era.

Published
2021
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40. Contender waveforms for Low-Power Wide-Area networks in a scheduled 4G OFDM framework

Author

Yoann Roth, Jean-Baptiste Doré, Laurent Ros, and Vincent Berg

Subjects
LPWA, OFDM, Turbo codes, FSK, Zadoff-Chu, Constant envelope, Telecommunication, TK5101-6720, Electronics, TK7800-8360
Abstract

Abstract 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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41. 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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42. 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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