Simultaneous Information Relaying and Jamming via IRS to Secure NOMA Networks

Mengyi Ji, Jian Chen, Lu Lv, Qingqing Wu, Zhiguo Ding, Long Yang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

This paper proposes a new simultaneous information relaying and jamming (SIRJ) scheme based on a multi-functional intelligent reflecting surface (IRS) to improve physical layer security of non-orthogonal multiple access networks. Specifically, the elements of IRS are split into two groups, where one group reflects the signal to improve the legitimate reception quality while the other group generates jamming signal to interfere with the eavesdropper. We aim to maximize the minimum secrecy rate (MSR) by jointly optimizing the transmit beamforming of the base station and the reflect beamforming of the IRS to enhance the secrecy performance. To tackle this intractable non-convex problem, a penalty based alternating algorithm is developed. Simulation results demonstrate the secrecy enhancement of the proposed SIRJ scheme over existing baseline schemes in terms of achieving a higher MSR.

Original languageBritish English
Title of host publication2022 IEEE 14th International Conference on Wireless Communications and Signal Processing, WCSP 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1119-1124
Number of pages6
ISBN (Electronic)9781665450850
DOIs
StatePublished - 2022
Event14th IEEE International Conference on Wireless Communications and Signal Processing, WCSP 2022 - Virtual, Online, China
Duration: 1 Nov 20223 Nov 2022

Publication series

Name2022 IEEE 14th International Conference on Wireless Communications and Signal Processing, WCSP 2022

Conference

Conference14th IEEE International Conference on Wireless Communications and Signal Processing, WCSP 2022
Country/TerritoryChina
CityVirtual, Online
Period1/11/223/11/22

Keywords

  • Intelligent reflecting surface
  • non-orthogonal multiple access
  • physical layer security
  • secrecy rate

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