Physical Layer Security for Intelligent Reflecting Surface Assisted Two-Way Communications

被引：36

作者：

Wijewardena, Mevan ^{[1
]}

Samarasinghe, Tharaka ^{[1
,2
]}

Hemachandra, Kasun T. ^{[1
]}

Atapattu, Saman ^{[2
]}

Evans, Jamie S. ^{[2
]}

机构：

[1] Univ Moratuwa, Dept Elect & Telecommun Engn, Moratuwa 10400, Sri Lanka

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

来源：

IEEE COMMUNICATIONS LETTERS | 2021年 / 25卷 / 07期

基金：

澳大利亚研究理事会;

关键词：

Intelligent reflecting surface; physical-layer security; secrecy rate; two-way communications; WIRELESS COMMUNICATIONS; PERFORMANCE ANALYSIS; SECRECY RATE;

D O I：

10.1109/LCOMM.2021.3068102

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

This letter investigates the exploitation of an intelligent reflecting surface (IRS) to communicate securely in a two-way network consisting of an untrusted user. In particular, the transmit powers and the phase shift at each element of the IRS are optimized to maximize the sum-secrecy rate, such that the IRS-reflected and non-IRS-reflected signals are added destructively at the untrusted user. The proposed iterative algorithm converges rapidly to a feasible solution of high accuracy with a few iterations. Numerical results demonstrate sum-secrecy rate gains up to 120% compared to naive or partially optimized schemes.

引用

页码：2156 / 2160

页数：5

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