Secrecy Performance of RIS-assisted Wireless Networks under Rician fading

TL;DR

This paper investigates the secrecy performance of RIS-assisted wireless networks under Rician fading, proposing a heuristic algorithm to optimize phase-shifts and improve security metrics like SOP and SR.

Contribution

It introduces a simple heuristic algorithm for optimal phase-shift design in RIS-assisted networks to enhance secrecy performance under Rician fading.

Findings

Optimal phase-shifts outperform random ones in secrecy metrics

Simulation confirms the effectiveness of the proposed algorithm

RIS can significantly improve wireless security under Rician fading

Abstract

Secrecy outage probability (SOP) and secrecy rate (SR) of the reconfigurable intelligent surface (RIS) assisted wireless networks under Rician fading are investigated in this paper. More precisely, we enhance the secrecy performance of the considered networks by suppressing the wiretap channel instead of maximizing the main channel. We propose a simple heuristic algorithm to find out the optimal phase-shift of each RIS's element. Simulation results based on the Monte-Carlo method are given to verify the superiority of the proposed optimal phase-shifts compared to the random phase-shifts design.