Closed-form Analysis of a Decode-and-Forward Scheme under Physical Layer Security over General Fading Channels

In this paper, the performance analysis of the decode-and-forward scheme under physical layer security is investigated in the cooperation model where the maximum end-to-end achievable secrecy rate (ASR) is used for selecting the best relay. The system performance is then evaluated by the outage probability of ASR over the general fading channels such as Nakagami-m, Rician and Rayleigh. The cumulative distribution function (CDF) of ASR is obtained in closed-form, and hence, the outage probability is expressed exactly. The Monte-Carlo results are presented to verify the theoretical analysis.