Análise de Sigilo de Sistemas sem Fio Assistidos por RIS sob desvanecimento κ-μ

This work analyzes the secrecy performance of a RIS-assisted wiretap system over κ-μ fading channels, accounting for the statistical behavior of the channel phase. The RIS is configured to provide perfect phase alignment at the legitimate receiver, whereas the eavesdropping link experiences imperfect phase alignment. Closed-form approximate expressions for the probability density function (PDF) and cumulative distribution function (CDF) of the legitimate-link SNR are derived via a central limit theorem (CLT) based approach, while the eavesdropping-link SNR is characterized semi-analytically using a Gamma approximation. Based on these statistics, the secrecy outage probability (SOP) is obtained. Monte Carlo simulations validate the analysis and quantify the impact of phase misalignment on secrecy performance.