Is Backscatter Link Stronger than Direct Link in Reconfigurable Intelligent Surface-Assisted System?

被引：110

作者：

Zhao, Wenjing ^{[1
]}

Wang, Gongpu ^{[1
]}

Atapattu, Saman ^{[2
]}

Tsiftsis, Theodoros A. ^{[3
]}

Tellambura, Chintha ^{[4
]}

机构：

[1] Beijing Jiaotong Univ, Sch Comp & Informat Technol, Beijing Key Lab Transportat Data Anal & Min, Beijing 100044, Peoples R China

[2] Univ Melbourne, Dept Elect & Elect Engn, Parkville, Vic 3010, Australia

[3] Jinan Univ, Sch Intelligent Syst Sci & Engn, Zhuhai 519070, Peoples R China

[4] Univ Alberta, Dept Elect & Comp Engn, Edmonton, AB DEPT ELECT, Canada

来源：

IEEE COMMUNICATIONS LETTERS | 2020年 / 24卷 / 06期

基金：

澳大利亚研究理事会;

关键词：

Backscatter; Receivers; Radio frequency; Closed-form solutions; Data communication; Wires; Electronic mail; Backscatter communication; reconfigurable intelligent surface (RIS); parameter design; WIRELESS COMMUNICATION; MIMO; MODULATION;

D O I：

10.1109/LCOMM.2020.2980510

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

This letter considers integrating a backscatter link with a reconfigurable intelligent surface to enhance backscatter communication while assisting the direct communication. We derive the probability that the backscatter channel dominates in the composite channel. This probability is a useful performance measure to determine the number of reflectors. Since the exact probability lacks a closed-form solution, we develop two approximations by modeling the gain of the backscatter link with a Gaussian or Gamma distribution. We found that these approximations match well with the exact value. Importantly, with a well-designed number of reflectors, the channel gain of the backscatter link may be always stronger than that of the direct one.

引用

页码：1342 / 1346

页数：5

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