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.