STAR: SIMULTANEOUS TRANSMISSION AND REFLECTION FOR 360° COVERAGE BY INTELLIGENT SURFACES

被引：321
作者：
Liu, Yuanwei [1 ]
Mu, Xidong [4 ]
Xu, Jiaqi [2 ]
Schober, Robert [5 ]
Hao, Yang [3 ]
Poor, H. Vincent [6 ]
Hanzo, Lajos [7 ]
机构：
[1] Queen Mary Univ London, London, England
[2] Queen Mary Univ London, Sch Elect Engn & Comp Sci, London, England
[3] Queen Mary Univ London, Antennas & Electromagnet, London, England
[4] Beijing Univ Posts & Telecommun, Beijing, Peoples R China
[5] Friedrich Alexander Univ Erlangen Nurnberg FAU, Erlangen, Germany
[6] Princeton Univ, Princeton, NJ 08544 USA
[7] Univ Southampton, Southampton, Hants, England
来源：
IEEE WIRELESS COMMUNICATIONS | 2021年 / 28卷 / 06期
基金：
欧洲研究理事会; 英国工程与自然科学研究理事会;
关键词：
D O I：
10.1109/MWC.001.2100191
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
A novel simultaneous transmitting and reflecting (STAR) system design relying on reconfigurable intelligent surfaces (RISs) is conceived. First, an existing prototype is reviewed, and the potential benefits of STAR-RISs are discussed. Then the key differences between conventional reflecting-only RISs and STAR-RISs are identified from the perspectives of hardware design, physical principles, and communication system design. Furthermore, the basic signal model of STAR-RISs is introduced, and three practical protocols are proposed for their operation, namely energy splitting, mode switching, and time switching. Based on the proposed protocols, a range of promising application scenarios are put forward for integrating STAR-RISs into next-generation wireless networks. By considering the downlink of a typical RIS-aided multiple-input single-output system, numerical case studies are provided for revealing the superiority of STAR-RISs over other baselines when employing the proposed protocols. Finally, several open research problems are discussed.
引用
收藏
页码：102 / 109
页数：8
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