Secure Wireless Communication in RIS-Aided MISO System with Hardware Impairments

Gui Zhou, Cunhua Pan*, Hong Ren, Kezhi Wang, Zhangjie Peng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

In practice, residual transceiver hardware impairments inevitably lead to distortion noise which causes the performance loss. In this letter, we study the robust transmission design for a reconfigurable intelligent surface (RIS)-aided secure communication system in the presence of transceiver hardware impairments. We aim for maximizing the secrecy rate while ensuring the transmit power constraint on the active beamforming at the base station and the unit-modulus constraint on the passive beamforming at the RIS. To address this problem, we adopt the alternate optimization method to iteratively optimize one set of variables while keeping the other set fixed. Specifically, the successive convex approximation (SCA) method is used to solve the active beamforming optimization subproblem, while the passive beamforming is obtained by using the semidefinite program (SDP) method. Numerical results illustrate that the proposed transmission design scheme is more robust to the hardware impairments than the conventional non-robust scheme that ignores the impact of the hardware impairments.

Original languageEnglish
Article number9374557
Pages (from-to)1309-1313
Number of pages5
JournalIEEE Wireless Communications Letters
Volume10
Issue number6
Early online date10 Mar 2021
DOIs
Publication statusPublished - Jun 2021

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