On the Performance of Secure Full-Duplex Relaying under Composite Fading Channels

TL;DR

This paper analyzes the secrecy performance of full-duplex cooperative relaying over composite fading channels, deriving closed-form expressions for average secrecy rate and outage probability under different CSI knowledge scenarios.

Contribution

It provides new analytical expressions for secure full-duplex relaying performance considering composite fading and hostile attacks, highlighting its feasibility under various conditions.

Findings

Secure FD relaying is feasible despite strong self-interference.

Closed-form expressions for secrecy metrics are derived.

Secure communication persists even with sophisticated eavesdroppers.

Abstract

We assume a full-duplex (FD) cooperative network subject to hostile attacks and undergoing composite fading channels. We focus on two scenarios: \textit{a)} the transmitter has full CSI, for which we derive closed-form expressions for the \textit{average secrecy rate}; and \textit{b)} the transmitter only knows the CSI of the legitimate nodes, for which we obtain closed-form expressions for the \textit{secrecy outage probability}. We show that secure FD relaying is feasible, even under strong self-interference and in the presence of sophisticated multiple antenna eavesdropper.