Liu, Mingqian;
Wen, Zhaoxi;
Chen, Yunfei;
Tang, Jie;
Wong, Kai-Kit;
Yang, Xiaoniu;
(2025)
Beamforming-Enabled Covert Communications for Multi-Position Warden.
IEEE Journal on Selected Areas in Communications
10.1109/JSAC.2025.3647611.
(In press).
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Abstract
In covert communications, the position of the warden has a variety of situations, which leads to different scenes that require different covert communication schemes to ensure the security. In response to this situation, in this paper, a beamforming optimization method of covert communications for multi-position warden is proposed. Firstly, we formulate a general optimization problem and optimize it to maximize the covert communication rate of the user based on Dinkelbach’s transform. Subsequently, according to the optimized general optimization problem, we propose three schemes for three scenes corresponding to different fixed warden positions, using appropriate technologies for assistance in each scheme. Specifically, the intelligent reflecting surface (IRS) is used in Scene 1 and the integrated communication and jamming (ICAJ) is used in Scenes 2 and 3, and these technologies can assist the covert communication. Moreover, we propose an alternate optimization (AO) algorithm to solve the optimization problem of Scene 1 for its optimal covert communication performance. Additionally, we also propose an AO algorithm to solve the optimization problems of Scenes 2 and 3 to optimize the active beamforming. Simulation results demonstrate the effectiveness of all three proposed schemes, that outperform their respective benchmark schemes.
| Type: | Article |
|---|---|
| Title: | Beamforming-Enabled Covert Communications for Multi-Position Warden |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/JSAC.2025.3647611 |
| Publisher version: | https://doi.org/10.1109/jsac.2025.3647611 |
| 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: | Beamforming optimization, covert communications, integrated communication and jamming, intelligent reflecting surface, multi-position warden |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS 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/10220067 |
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