eprintid: 10187538
rev_number: 6
eprint_status: archive
userid: 699
dir: disk0/10/18/75/38
datestamp: 2024-02-22 10:48:46
lastmod: 2024-02-22 10:48:46
status_changed: 2024-02-22 10:48:46
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Xiao, H
creators_name: Hu, X
creators_name: Li, A
creators_name: Wang, W
creators_name: Su, Z
creators_name: Wong, KK
creators_name: Yang, K
title: STAR-RIS Enhanced Joint Physical Layer Security and Covert Communications for Multi-antenna mmWave Systems
ispublished: inpress
divisions: UCL
divisions: B04
divisions: C05
divisions: F46
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
abstract: This paper investigates the utilization of simultaneously transmitting and reflecting RIS (STAR-RIS) in supporting joint physical layer security (PLS) and covert communications (CCs) in a multi-antenna millimeter wave (mmWave) system, where the base station (BS) communicates with both covert and security users while defeating eavesdropping by wardens with the help of a STAR-RIS. Specifically, analytical derivations are performed to obtain the closed-form expression of warden’s minimum detection error probability (DEP). Furthermore, the asymptotic result of the minimum DEP and the lower bound of the secure rates are derived, considering the practical assumption that BS only knows the statistical channel state information (CSI) between STAR-RIS and the wardens. Subsequently, an optimization problem is formulated with the aim of maximizing the average sum of the covert rate and the minimum secure rate while ensuring the covert requirement and quality of service (QoS) for legal users by jointly optimizing the active and passive beamformers. Due to the strong coupling among variables, an iterative algorithm based on the alternating strategy and the semi-definite relaxation (SDR) method is proposed to solve the non-convex optimization problem. Simulation results indicate that the performance of the proposed STAR-RIS-assisted scheme greatly surpasses that of the conventional RIS scheme, which validates the superiority of STAR-RIS in simultaneously implementing PLS and CCs.
date: 2024-01-30
date_type: published
publisher: Institute of Electrical and Electronics Engineers (IEEE)
official_url: http://dx.doi.org/10.1109/twc.2024.3354452
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2247653
doi: 10.1109/TWC.2024.3354452
lyricists_name: Wong, Kai-Kit
lyricists_id: KWONG98
actors_name: Flynn, Bernadette
actors_id: BFFLY94
actors_role: owner
full_text_status: public
publication: IEEE Transactions on Wireless Communications
citation:        Xiao, H;    Hu, X;    Li, A;    Wang, W;    Su, Z;    Wong, KK;    Yang, K;      (2024)    STAR-RIS Enhanced Joint Physical Layer Security and Covert Communications for Multi-antenna mmWave Systems.                   IEEE Transactions on Wireless Communications        10.1109/TWC.2024.3354452 <https://doi.org/10.1109/TWC.2024.3354452>.    (In press).    Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10187538/1/STAR-RIS_Enhanced_Joint_Physical_Layer_Security_and_Covert_Communications_for_Multi-antenna_mmWave_Systems.pdf