Open Access

ARTICLE

V2I Physical Layer Security Beamforming with Antenna Hardware Impairments under RIS Assistance

Zerong Tang, Tiecheng Song^*, Jing Hu

School of Information Science and Engineering, Southeast University, Nanjing, 210096, China

* Corresponding Author: Tiecheng Song. Email:

(This article belongs to the Special Issue: Advanced Communication and Networking Technologies for Internet of Things and Internet of Vehicles)

Computers, Materials & Continua 2024, 81(1), 1835-1854. https://doi.org/10.32604/cmc.2024.056983

Received 04 August 2024; Accepted 19 September 2024; Issue published 15 October 2024

Abstract

The Internet of Vehicles (IoV) will carry a large amount of security and privacy-related data, which makes the secure communication between the IoV terminals increasingly critical. This paper studies the joint beamforming for physical-layer security transmission in the coexistence of Vehicle-to-Infrastructure (V2I) and Vehicle-to-Vehicle (V2V) communication with Reconfigurable Intelligent Surface (RIS) assistance, taking into account hardware impairments. A communication model for physical-layer security transmission is established when the eavesdropping user is present and the base station antenna has hardware impairments assisted by RIS. Based on this model, we propose to maximize the V2I physical-layer security transmission rate. To solve the coupled non-convex optimization problem, an alternating optimization algorithm based on second-order cone programming and semidefinite relaxation is proposed to obtain the optimal V2I base station transmit precoding and RIS reflect phase shift matrix. Finally, simulation results are presented to verify the convergence and superiority of our proposed algorithm while analyzing the impact of system parameters on the V2I physical-layer security transmission rate. The simulation results further demonstrate that the proposed robust beamforming algorithm considering hardware impairments will achieve an average performance improvement of 0.7 dB over a non-robustly designed algorithm. Furthermore, increasing the number of RIS reflective units from 10 to 50 results in an almost 2 dB enhancement in secure transmission rate.

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Keywords

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