Physical layer security over cascaded Rayleigh fading channels

In this letter, physical layer secrecy/security performance analysis has been investigated over cascaded fading channels where the fading effects are worse than those in the cellular communication channels like Rayleigh and Nakagami-m. Analytic results are derived for the double Rayleigh fading channel model. As the analysis are evaluated, first the closed-form expression of the probability of the positive secrecy capacity is obtained, then the exact secrecy outage probability is obtained in the closed-form. Finally, the analytic results are verified by comparing with the computer simulations.