High Throughput FPGA Implementation for regular Non-Surjective Finite Alphabet Iterative Decoders

International audience—This paper deals with the recently introduced class of Non-Surjective Finite Alphabet Iterative Decoders (NS-FAIDs). First, optimization results for an extended class of regular NS-FAIDs are presented. They reveal different possible trade-offs between decoding performance and hardware implementation efficiency. To validate the promises of optimized NS-FAIDs in terms of hardware implementation benefits, we propose two high-throughput hardware architectures, integrating NS-FAIDs decoding kernels. Implementation results show that NS-FAIDs allow significant improvements in terms of both throughput and hardware resources consumption, as compared to a baseline Min-Sum decoder, with even better or only slightly degraded decoding performance

FPGA Implementation of a Wideband Multi-Gb/s 5G BF-OFDM Transceiver

International audienceThis paper describes a Field Programmable Gate Array (FPGA) implementation of a multi-Gb/s Block Filtered (BF) OFDM transceiver, fully 5G NR compatible. The main obstacles for such a work are (i) the support of multiple configurations and parameters, (ii) the high bandwidth w.r.t the board clock frequency and (iii) the intrinsic complexity of BF-OFDM. We prove that despite these barriers an hardware implementation of this waveform is possible, even with a bandwidth up to 400 MHz. We based our developments on the following pillars: smart layout of the basic modules, parallelization of dedicated functions design and ad hoc architecture. Measurements and complexity analysis demonstrate the high flexibility of BF-OFDM

Coherent Multi-Channel Ranging for Narrowband LPWAN: Simulation and Experimentation Results

International audiencePrecise radio based positioning for low power wide area networks remains a challenging research area due to narrowband signals and multipath propagation. Multi-channel ranging provides improved temporal resolution by coherent processing. While this technique has been applied to short range radio standards, no experimental demonstration for long range radio devices exists. The present paper introduces a hardware testbed for phase coherent multi-channel processing of narrowband signals. Simulations and preliminary experimental multi-channel results show a higher ranging precision (factor 20) over time based ranging. In a frequency flat channel with a 10 kHz signal, precisions down to 10 m (phase based) and 200 m (time based) have been achieved. Precision degrades in multipath propagation scenarios

An MC-SS Platform for Short-Range Communications in the Personal Network Context

Abstract Wireless personal area networks (WPANs) have gained interest in the last few years, and several air interfaces have been proposed to cover WPAN applications. A multicarrier spread spectrum (MC-SS) air interface specified to achieve 130&#8201;Mbps in typical WPAN channels is presented in this paper. It operates in the 5.2&#8201;GHz ISM band and achieves a spectral efficiency of 3.25&#8201; . Besides the robustness of the MC-SS approach, this air interface yields to reasonable implementation complexity. This paper focuses on the hardware design and prototype of this MC-SS air interface. The prototype includes RF, baseband, and IEEE802.15.3 compliant medium access control (MAC) features. Implementation aspects are carefully analyzed for each part of the prototype, and key hardware design issues and solutions are presented. Hardware complexity and implementation loss are compared to theoretical expectations, as well as flexibility is discussed. Measurement results are provided for a real condition of operations.</p

An MC-SS platform for short-range communications in the Personal Network context

Wireless Personal Area Networks (WPAN) has gained interest in the last few years and several air interfaces have been proposed to cover WPAN applications. A Multi-Carrier Spread Spectrum (MC-SS) air interface specified to achieve 130 Mbps in typical WPAN channels, is presented in this paper. It operates in the 5.2 GHz ISM band and achieves a spectral efficiency of 3.25 b.s-1.Hz-1. Besides the robustness of the MC-SS approach, this air interface yields to reasonable implementation complexity. This paper focuses on the hardware design and prototype of this MC-SS air interface. The prototype includes RF, baseband and IEEE802.15.3 compliant Medium Access Control (MAC) features. Implementation aspects are carefully analyzed for each part of the prototype and key hardware design issues and solutions are presented. Hardware complexity and implementation loss are compared to theoretical expectation, as well as flexibility are discussed. Measurement results are provided for real condition of operations

IEEE 802.1 TSN Time Synchronization over Wi-Fi and 5G Mobile Networks

International audienceIEEE 802.1 Time-Sensitive Networking (TSN) is a set of standards that target deterministic communications with low latency. Among those standards, IEEE 802.1AS Time Synchronization is highly important as many other standards rely on it. Similar to wired TSN, wireless TSN currently also sees growing demand, especially from the real-time applications in smart factory. The document IEEE Std 802.1AS-2020 has specified how we can use this standard in non-Ethernet networks such as Wi-Fi. In this paper, we present our experiments and performance analyses of IEEE 802.1AS over Wi-Fi and 5G mobile systems. We provide qualitative, quantitative and experimental analyses on the setup, benchmark, and system performance. These analyses provide insights into (i) whether IEEE 802.1AS can be used straightforwardly in wireless networks, (ii) what and how factors impact its performance, and (iii) what hardware/software should be developed to improve this performance

IEEE 802.1 TSN Time Synchronization over Wi-Fi and 5G Mobile Networks

International audienceIEEE 802.1 Time-Sensitive Networking (TSN) is a set of standards that target deterministic communications with low latency. Among those standards, IEEE 802.1AS Time Synchronization is highly important as many other standards rely on it. Similar to wired TSN, wireless TSN currently also sees growing demand, especially from the real-time applications in smart factory. The document IEEE Std 802.1AS-2020 has specified how we can use this standard in non-Ethernet networks such as Wi-Fi. In this paper, we present our experiments and performance analyses of IEEE 802.1AS over Wi-Fi and 5G mobile systems. We provide qualitative, quantitative and experimental analyses on the setup, benchmark, and system performance. These analyses provide insights into (i) whether IEEE 802.1AS can be used straightforwardly in wireless networks, (ii) what and how factors impact its performance, and (iii) what hardware/software should be developed to improve this performance

5G-ALLSTAR: Beyond 5G satellite-terrestrial multi-connectivity

International audienceThis paper presents a summary of the results of the 5G-ALLSTAR project. It describes the enablers that have been developed and validated and will help make 5G and beyond satellite-terrestrial multi-connectivity (MC) a reality in the near future.We proposed and evaluated solutions for critical aspects of the integration of non-terrestrial networks into a 5G and beyond terrestrial network.The OpenAirInterface implementation of the 5G physical layer (PHY) has been upgraded to meet the satellite radio channel constraints. We addressed the issue of co-tier interference between satellite and terrestrial systems. We designed and implemented customized 5G Physical layer, specifically adapted for terrestrial-satellite spectrum sharing. On top of the dedicated beam-forming and hardware design, we validated the full potential of MC by conceiving and testing our proposed resource allocation algorithms based on a custom multipath TCP protocol. The contribution of MC in vehicular use cases has been demonstrated onsite by implementing a terrestrial 5G PHY in conjunction with a satellite/terrestrial traffic controller. Finally, radio resource management solutions were examined. Thanks to these tools, the presence of industry partners in the consortium and to an active participation in standardization, the 5G-ALLSTAR project is an accelerator for the integration of non-terrestrial networks in 5G and beyond