Outage Performances for Amplify-and-Forward, Decode-and-Forward and Cooperative Jamming Strategies for the Wiretap Channel

In this paper, the authors investigate the wiretap channel in the presence of a cooperative relay node. They analyze and compare the outage performance of three cooperatives schemes: Cooperative Jamming (CJ), Decode-and-Forward (DF), and Amplify-and-Forward (AF) for the Rayleigh slow fading channel. In particular, they derive a closed-form expression for the outage probability for the DF and CJ strategies, which allows an optimal strategy selection in terms of outage performance. They compare the three cooperative schemes through numerical simulations.