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STAR-RIS Aided Covert Communications

Xiao, H; Hu, X; Mu, P; Wang, W; Zheng, TX; Wong, KK; Yang, K; (2024) STAR-RIS Aided Covert Communications. In: Proceedings - IEEE Global Communications Conference, GLOBECOM. (pp. pp. 4229-4234). IEEE: Kuala Lumpur, Malaysia. Green open access

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Abstract

This paper investigates the multi-antenna covert communications assisted by a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS). In particular, to shelter the existence of communications between transmitter and receiver from a warden, a friendly full-duplex receiver with two antennas is leveraged to make contributions to confuse the warden. Considering the worst case, the closed-form expression of the minimum detection error probability (DEP) at the warden is derived and utilized as a covert constraint. Then, we formulate an optimization problem maximizing the covert rate of the system under the covertness constraint and quality of service (QoS) constraint with communication outage analysis. To jointly design the active and passive beamforming of the transmitter and STAR- RIS, an iterative algorithm based on globally convergent version of method of moving asymptotes (GCMMA) is proposed to effectively solve the non-convex optimization problem. Simu-lation results show that the proposed STAR-RIS-assisted scheme highly outperforms the case with conventional RIS.

Type: Proceedings paper
Title: STAR-RIS Aided Covert Communications
Event: GLOBECOM 2023 - 2023 IEEE Global Communications Conference
ISBN-13: 9798350310900
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/GLOBECOM54140.2023.10437497
Publisher version: https://doi.org/10.1109/GLOBECOM54140.2023.1043749...
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Covert communication, STAR-RIS, multiantenna, full-duplex, jamming
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10189527
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