Enhancements of SDR-Based FPGA System for V2X-VLC Communications  

作　　者：Lukas Danys Radek Martinek Rene Jaros Jan Baros Petr Simonik Vaclav Snasel 

机构地区：[1]Department of Cybernetics and Biomedical Engineering,Faculty of Electrical Engineering and Computer Science,VSB–Technical University of Ostrava,Ostrava-Poruba,70800,Czechia [2]Department of Electronics,Faculty of Electrical Engineering and Computer Science,VSB–Technical University of Ostrava,Ostrava-Poruba,70800,Czechia [3]Department of Computer Science,Faculty of Electrical Engineering and Computer Science,VSB–Technical University of Ostrava,Ostrava-Poruba,70800,Czechia

出　　处：《Computers, Materials & Continua》2021年第9期3629-3652,共24页计算机、材料和连续体（英文）

基　　金：This research was funded by the European Regional Development Fund in the Research Centre of Advanced Mechatronic Systems project,Project Number CZ.02.1.01/0.0/0.0/16_019/0000867 and by 543 the Ministry of Education of the Czech Republic,Project No.SP2021/32.

摘　　要：This pilot study focuses on a real measurements and enhancements of a software defined radio-based system for vehicle-to everything visible light communication(SDR-V2X-VLC).The presented system is based on a novel adaptive optimization of the feed-forward software defined equalization(FFSDE)methods of the least mean squares(LMS),normalized LMS(NLMS)and QR decomposition-based recursive least squares(QR-RLS)algorithms.Individual parameters of adaptive equalizations are adjusted in real-time to reach the best possible results.Experiments were carried out on a conventional LED Octavia III taillight drafted directly from production line and universal software radio peripherals(USRP)from National Instruments.The transmitting/receiving elements used multistate quadrature amplitude modulation(M-QAM)implemented in LabVIEW programming environment.Experimental results were verified based on bit error ratio(BER),error vector magnitude(EVM)and modulation error ratio(MER).Experimental results of the pilot study unambiguously confirmed the effectiveness of the proposed solution(longer effective communication range,higher immunity to interference,deployment of higher state QAM modulation formats,higher transmission speeds etc.),as the adaptive equalization significantly improved BER,MER and EVM parameters.The best results were achieved using the QR-RLS algorithm.The results measured on deployed QR-RLS algorithm had significantly better Eb/N0(improved by approx.20 dB)and BER values(difference by up to two orders of magnitude).

关 键 词：5G feed-forward software defined equalization multistate quadrature amplitude modulation software defined radio visible light communication 

分 类 号：TN9[电子电信—信息与通信工程]