无线电通信技术2024，Vol.50Issue(2)：303-311,9.DOI:10.3969/j.issn.1003-3114.2024.02.011
多RIS辅助通信网络协同传输性能研究
Research on Cooperative Transmission Performance of Multi-RIS Auxiliary Communication Network
摘要
Abstract
The performance analysis of multi Reconfigurable Intelligent Surface(RIS)aided wireless system is studied.Multiple RIS of the same geometric size are deployed in wireless channel to improve the communication system performance,considering that the wireless channels associated with different RIS are independent and non-identically distributed with different distribution and statistical characteristics.Based on the system model above,two goal-oriented multi-RIS auxiliary schemes are proposed,namely Exhaustive RIS-Aided(ERA)and Opportunistic RIS-Aided(ORA)schemes.A mathematical model of end-to-end channel based on moment method is used.The end-to-end channel coefficient can be approximated to gamma distribution.Based on this,the performance of the two schemes is evaluated in terms of Outage Probability(OP)and Ergodic Capacity(EC).The upper and lower bounds of channel capacity are studied,and a fast method for estimating the reachable transmission rate is provided.Results show that ERA scheme is better than ORA scheme in OP and EC.关键词
智能超表面/性能分析/伽马分布/各态历经容量/中断概率Key words
RIS/performance analysis/gamma distribution/EC/OP分类
信息技术与安全科学引用本文复制引用
孟祥浩,安康,施育鑫,林志..多RIS辅助通信网络协同传输性能研究[J].无线电通信技术,2024,50(2):303-311,9.基金项目
国家自然科学基金(62201592,61901502)National Natural Science Foundation of China(62201592,61901502) （62201592,61901502）
