Physical layer security of STAR-RIS-aided RSMA systems

被引：4

作者：

Xiao, Fengcheng ^{[1
]}

Chen, Pengxu ^{[1
]}

Xu, Shuobo ^{[1
]}

Pang, Xiyu ^{[1
]}

Liu, Hongwu ^{[1
]}

机构：

[1] Shandong Jiaotong Univ, Sch Informat Sci & Elect Engn, Jinan 250357, Peoples R China

来源：

PHYSICAL COMMUNICATION | 2023年 / 61卷

基金：

中国国家自然科学基金;

关键词：

Physical layer security; Rate-splitting multiple access; reconfigurable intelligent surface; Secrecy outage probability; Simultaneously transmitting and reflecting; INTELLIGENT REFLECTING SURFACE; WIRELESS COMMUNICATION; MULTIPLE-ACCESS; NETWORKS NOMA; TRANSMISSION; DOWNLINK; DESIGN;

D O I：

10.1016/j.phycom.2023.102192

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, we investigate the physical layer security (PLS) of a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS)-aided rate-splitting multiple access (RSMA) system in the presence of an eavesdropper. The STAR-RIS is deployed to aid the communications from the base-station to two legitimate users, while preventing the eavesdropper from wiretapping the legitimate communications. We derive closed-form expressions for channel statistics of the combined and transmitted links by taking into account Nakagami-m fading. The impacts of the STAR-RIS and Nakagami-m fading on the scerecy performance are investigated. Specifically, we derive the closed-form expressions for the legitimate users' secrecy outage probability (SOP) and investigate the asymptotic behaviors of users' SOP in the high signal-to-noise ratio (SNR) region. Additionally, the impacts of transmit power, target secrecy rate, power allocation parameters, and the number of reflection and transmission elements of STAR-RIS on the system secrecy performance are studied. Numerical results demonstrate the superiority of the STAR-RIS-aided RSMA scheme over other STAR-RIS-aided multiple access schemes in terms of the system secrecy performance.(c) 2023 Elsevier B.V. All rights reserved.

引用

页数：13

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