Reconfigurable intelligent surfaces for 6G:applications,challenges,and solutions  

作　　者：Yajun ZHAO 

机构地区：[1]Beijing Institute of Technology,Beijing,100081,China [2]ZTE Corporation,Beijing,100029,China

出　　处：《Frontiers of Information Technology & Electronic Engineering》2023年第12期1669-1688,共20页信息与电子工程前沿（英文版）

基　　金：Project supported by the National Key Research and Development Program of China(No.2020YFB1807600)。

摘　　要：Scholars are expected to continue enhancing the depth and breadth of theoretical research on reconfigurable intelligent surface(RIS)to provide a higher theoretical limit for RIS engineering applications.Notably,significant advancements have been achieved through both academic research breakthroughs and the promotion of engineering applications and industrialization.We provide an overview of RIS engineering applications,focusing primarily on their typical features,classifications,and deployment scenarios.Furthermore,we systematically and comprehensively analyze the challenges faced by RIS and propose potential solutions including addressing the beamforming issues through cascade channel decoupling,tackling the effects and resolutions of regulatory constraints on RIS,exploring the network-controlled mode for RIS system architecture,examining integrated channel regulation and information modulation,and investigating the use of the true time delay(TTD)mechanism for RIS.In addition,two key technical points,RIS-assisted non-orthogonal multiple access(NOMA)and RIS-based transmitter,are reviewed from the perspective of completeness.Finally,we discuss future trends and challenges in this field.

关 键 词：6G Reconfigurable intelligent surface(RIS) Cascade channel decoupling RIS regulatory constraint RIS system 

分 类 号：TN929.5[电子电信—通信与信息系统]