Achieving covert communication by IRS-NOMA

Lu Lv, Qingqing Wu, Zan Li, Zhiguo Ding, Naofal Al-Dhahir, Jian Chen

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

6 Scopus citations

Abstract

We consider a covert communication scenario, where a legitimate transmitter (Alice) applies non-orthogonal multiple access (NOMA) to communicate with a covert user (Bob) and a public user (Roy) aided by an intelligent reflecting surface (IRS). Specifically, we propose to exploit the phase-shift uncertainty of the IRS and the non-orthogonal signal transmission of Roy as the cover medium to hide the existence of Bob's covert transmission from a warden (Willie). We derive an analytical expression for the minimum average detection error probability of Willie and optimize the transmit power and the IRS reflect beamforming for the covert rate maximization. Our analytical and numerical results show that covert communication is impossible without using IRS or NOMA for the considered setup, while the proposed scheme can always guarantee a positive covert rate.

Original languageBritish English
Title of host publication2021 IEEE/CIC International Conference on Communications in China, ICCC 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages421-426
Number of pages6
ISBN (Electronic)9781665443852
DOIs
StatePublished - 28 Jul 2021
Event2021 IEEE/CIC International Conference on Communications in China, ICCC 2021 - Xiamen, China
Duration: 28 Jul 202130 Jul 2021

Publication series

Name2021 IEEE/CIC International Conference on Communications in China, ICCC 2021

Conference

Conference2021 IEEE/CIC International Conference on Communications in China, ICCC 2021
Country/TerritoryChina
CityXiamen
Period28/07/2130/07/21

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