RIS-aided secure communications over Fisher-Snedecor $\mathcal{F}$ Fading Channels

TL;DR

This paper analyzes the impact of reconfigurable intelligent surfaces on physical layer security in wireless systems with Fisher-Snedecor $ ext{F}$ fading, deriving analytical expressions for secrecy metrics and validating them with simulations.

Contribution

It provides the first closed-form expressions for secrecy outage probability and average secrecy capacity over Fisher-Snedecor $ ext{F}$ fading channels with RIS assistance.

Findings

RIS improves secrecy performance in Fisher-Snedecor $ ext{F}$ fading channels.

Analytical results match Monte-Carlo simulations.

Asymptotic analysis reveals the behavior of secrecy metrics at high SNR.

Abstract

\textcolor{blue}{In} this paper, we investigate the performance of physical layer security (PLS) over reconfigurable intelligent surfaces (RIS)-aided wireless communication systems, where all fading channels are modeled with Fisher-Snedecor $\mathcal{F}$ distribution. Specifically, we consider a RIS with $N$ reflecting elements between the transmitter and the legitimate receiver to develop a smart environment and also meliorate secure communications. In this regard, we derive the closed-form expressions for the secrecy outage probability (SOP) and average secrecy capacity (ASC). \textcolor{blue}{We also analyze the asymptotic behaviour of the SOP and ASC by exploiting the residue approach}. Monte-Carlo (MC) simulation results are provided throughout to validate the correctness of the developed analytical results, showing that considering RIS in wireless communication systems has constructive effects on the secrecy performance.