The Impact of Side Information on Physical Layer Security under Correlated Fading Channels

TL;DR

This paper explores how side information at the transmitter influences physical layer security in correlated fading channels, deriving formulas for secrecy capacity and outage probability, and demonstrating performance improvements.

Contribution

It introduces a novel analysis of side information impact on PLS under correlated fading using copula techniques, providing closed-form expressions for key security metrics.

Findings

Side information improves secrecy capacity and outage probability.

Correlation in fading channels affects security performance.

Using copula models effectively captures fading dependence.

Abstract

In this paper, we investigate the impact of side information (SI) on the performance of physical layer security (PLS) under correlated fading channels. By considering non-causally known SI at the transmitter and exploiting the copula technique to describe the fading correlation, we derive closed-from expressions for the average secrecy capacity (ASC) and secrecy outage probability (SOP) under positive/negative dependence conditions. We indicate that considering such knowledge at the transmitter is beneficial for system performance and ensures reliable communication with higher rates, as it improves the SOP and brings higher values of the ASC.