RIS辅助通信系统信道参数获取与仿真评估  

Channel parameter acquisition and simulation evaluation of RIS-aided wireless communication system

作　　者：韩福勇 丁金明 费丹 章嘉懿 艾渤[1] HAN Fuyong;DING Jinming;FEI Dan;ZHANG Jiayi;AI Bo(School of Electronic and Information Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学电子信息工程学院,北京100044

出　　处：《北京交通大学学报》2023年第5期63-71,共9页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金(61971027)。

摘　　要：传统无线通信只能被动适应信道环境,无法控制信道,无线传播环境的随机性和不确定性会严重影响通信质量.智能超表面(Reconfigurable Intelligent Surface,RIS)技术能够主动配置信道环境,引入RIS将是未来无线通信的新范式.为探究RIS应用前景,首先分析RIS单元结构及波束赋形原理.其次,基于室内室外两种场景多种入射、反射角度RIS辅助通信的实验数据,提取信道参数,搭建RIS辅助通信的信道仿真平台.最后对各场景进行仿真,比较RIS编码前后参考信号接收功率(Reference Singal Receiving Power,RSRP)、信干噪比(Signal to Interference plus Noise Ratio,SINR)和吞吐量3项测试指标.仿真结果表明:与RIS编码前相比,RIS编码后RSRP、SINR以及吞吐量均有所提升,且室外场景的增益优于室内场景,说明RIS可以主动控制无线信道,改善服务质量,研究结果对实际场景应用RIS具有一定的参考价值.Traditional wireless communication systems can only passively adapt to channel conditions,lacking the ability to control the channel environment.The stochastic and uncertain nature of the wire-less propagation environment significantly impacts communication quality.The Reconfigurable Intelli-gent Surface(RIS)technology can actively configure the wireless channel environment,and the intro-duction of RIS will be a new paradigm for future wireless communications.To explore the potential ap-plications of RIS,this paper firstly analyzes the unit structure and beamforming principles of RIS.Sec-ondly,based on the experimental data from indoor and outdoor scenarios with various incident and re-flection angles in RIS-aided communication systems,the channel parameters are extracted,building a simulation platform for RIS-aided communication channels.Finally,simulations are conducted for each scenario,and key performance indicators,including Reference Signal Receiving Power(RSRP),Signal to Interference plus Noise Ratio(SINR),and throughput,are compared before and after RIS coding.The simulation results show that,compared to scenarios without RIS coding,the deployment of RIS with coding modulation results in improvements in RSRP,SINR,and throughput.Further-more,outdoor scenarios demonstrate greater gains than indoor scenarios,indicating that RIS can ac-tively control wireless channels and improve service quality.The research results offer valuable in-sights for the practical application of RIS in real-world scenarios.

关 键 词：智能超表面 信道仿真 性能提升 无线通信 

分 类 号：TN929.5[电子电信—通信与信息系统]