面向6G的RIS信道测量与建模研究进展  

Advancements in RIS Channel Measurement and Modeling for 6G

作　　者：张建华 张骥威 张宇翔 巩汇文 田磊 ZHANG Jianhua;ZHANG Jiwei;ZHANG Yuxiang;GONG Huiwen;TIAN Lei(School of Information and Communication Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China;School of Integrated Circuits,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876 [2]北京邮电大学集成电路学院,北京100876

出　　处：《无线电通信技术》2024年第2期227-237,共11页Radio Communications Technology

基　　金：国家重点研发计划(2023YFB2904805);国家自然科学基金青年科学基金(62101069,62201087);国家自然科学基金重点项目(92167202);国家杰出青年科学基金(61925102)。

摘　　要：智能超表面(Reconfigurable Intelligent Surface, RIS)技术被认为是6G中很有应用前景的技术。RIS信道研究对于RIS辅助通信系统的技术创新和性能评价至关重要。综述了RIS信道的测量与建模研究进展,总结了基于矢量网络分析仪(Vector Network Analyzer, VNA)的频域测量和基于滑动相关的时域测量两种信道测量方法。介绍了基于时域的RIS信道测量平台,并对目前的测量活动进行了总结。分析了RIS信道中的阵元反射系数、散射方向图和级联路径损耗三个特性。总结了RIS信道统计性建模、确定性建模和混合型建模的方法,给出了一种基于现有5G标准的3D几何统计性信道模型(Geometric-Based Stochastic Model, GBSM)扩展的RIS信道建模方法,以及基于此方法的RIS信道仿真平台。展望了RIS信道测量和建模研究面临的挑战和未来的研究方向。Reconfigurable Intelligent Surface(RIS)technology is considered a promising application in 6G.The research on RIS channels is crucial for technological innovation and performance evaluation of RIS assisted communication systems.This article reviews the research progress in measurement and modeling of RIS channels.We summarized two channel measurement methods,frequency domain measurement based on Vector Network Analyzer(VNA)and time-domain measurement based on sliding correlation.We introduced a time-domain RIS channel measurement platform and summarized current measurement activities.Three characteristics of element reflection coefficient,scattering pattern,and cascaded path loss in RIS channels are analyzed.A summary of RIS channel modeling methods,including statistical modeling,deterministic modeling,and hybrid modeling,is presented.An extended RIS channel modeling method based on existing 5G standard s 3D Geometric-Based Stochastic Model(GBSM)is proposed,as well as an RIS channel simulation platform based on this method.Finally,challenges and future research directions faced by RIS channel measurement and modeling research were discussed.

关 键 词：智能超表面 信道测量 信道建模 3D几何统计性信道建模 

分 类 号：TN929.5[电子电信—通信与信息系统]