CSI acquisition in RIS-assisted mobile communication systems  

作　　者：Yu Han Wankai Tang Xiao Li Michail Matthaiou Shi Jin 

机构地区：[1]National Mobile Communications Research Laboratory,Southeast University,Nanjing 210096,China [2]Centre for Wireless Innovation(CWI),Queen’s University Belfast,Belfast BT39DT,UK

出　　处：《National Science Review》2023年第8期27-41,共15页国家科学评论（英文版）

基　　金：supported in part by the National Natural Science Foundation of China (62261160576, 61921004, 62231009, 61971126, 62201138 and 62341107);the Natural Science Foundation of Jiangsu Province (BK20211511 and BK20220809);the Jiangsu Province Frontier Leading Technology Basic Research Project (BK20212002);the joint project of China Mobile Research Institute and Southeast University;supported by a research grant from the Department for the Economy Northern Ireland under the US-Ireland R&D Partnership Programme

摘　　要：Reconfigurable intelligent surface-(RIS)assisted mobile communication is a promising technological paradigm thanks to the attractive advantages of low cost and flexible control of electromagnetic waves.However,the low-cost features of RISs entail some fundamental challenges to the acquisition of channel state information(CSI),which is essential for the optimal RIS design.To tackle this problem,there have been extensive studies on CSI acquisition in RIS-assisted mobile communication systems,from the perspective of architectural improvement as well as specific mathematical solutions.This article aims to overview the existing works on CSI acquisition in RIS-assisted mobile communication systems.

关 键 词：channel estimation hybrid RIS implicit CSI RIS Subject Information Science 

分 类 号：TN929.5[电子电信—通信与信息系统]