Secrecy outage performance for partial relay selection schemes in network coding systems

In this paper, secrecy outage performance is studied for partial relay selection schemes in dual-hop network coding (NC) systems over Rayleigh fading channels. In the considered systems, there are one eavesdropper, one jammer that can send interference to the eavesdropper, and k (k >1) relays, one of which is selected as the NC relay to process the messages from the source and the destination by XOR operation in order to prevent the eavesdropper´s interception. We study the secrecy outage performance for two partial relay selection (PRS) schemes: (1) the optimal source-relay link scheme; (2) the optimal source-relay -destination link scheme. The exact closed-form expressions for the secrecy outage probability of the two PRS schemes are derived. Finally, simulation results are given to verify the analytical results.