计算机应用研究2024，Vol.41Issue(10)：3129-3134,6.DOI:10.19734/j.issn.1001-3695.2024.02.0041
多RIS辅助车载通信信号优化及部署规划
Optimization and deployment planning of multi RIS assisted in vehicle communication signals
摘要
Abstract
This paper proposed a scheme to assist communication for vehicles undergoing uniform motion with variable speed,addressing issues such as Doppler spread,time delay spread,and received signal-to-noise ratio(SNR)through the utilization of a multi-intelligent RIS.Unlike traditional channel estimation,this scheme utilized channel gains and optimized RIS phase to minimize Doppler and delay spreads while maximizing instantaneous signal-to-noise ratio(SNR)for the moving object.The scheme studied the impact of RIS placement on the received signal by optimizing the RIS phase,exploring the distance between RIS units and the optimal positioning of RIS units when the distance between them was fixed to maintain a low range of reception SNR and delay spreading.It introduced relative motion theory for this problem and proposed respective algorithms to address both issues.Simulations show around a 10 dB power gain for vehicular communication receivers with multiple RIS assistance.Optimal RIS deployment suggests placing the first RIS near the base station and minimizing inter-RIS distances as much as practically fea-sible,showcasing the broad applicability of this multi-RIS communication approach in vehicular scenarios.关键词
匀变速运动/多普勒扩展/时延扩展/接收信噪比/智能超表面Key words
uniform speed/Doppler spread/time delay spread/received signal-to-noise ratio/reconfigurable intelligence surface(RIS)分类
信息技术与安全科学引用本文复制引用
陈发堂,王嘉程,刘祚..多RIS辅助车载通信信号优化及部署规划[J].计算机应用研究,2024,41(10):3129-3134,6.基金项目
重庆市自然科学基金创新发展联合基金资助项目(中国星网)资助项目(CST2023NSCQ-LZX0114) （中国星网）
