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Outage performance of secure cooperative systems over correlated Rayleigh fading channels

This paper investigates the outage performance of the secure cooperative system over correlated Rayleigh fading channels in the presence of the eavesdropper and the jammer. Assuming that the transmitter knows the full channel state information (CSI) before transmission, there exist one eavesdropper and multiple cooperative relay nodes in system, and a relay node is chosen to act as jammer to send the jamming signals. We consider two typical scenarios: 1) the legitimate channel is correlated with the jamming channel to the destination, while the wiretap channel is independent of the jamming channel to the eavesdropper, and 2) the wiretap channel is correlated with the jamming channel to the eavesdropper, while the legitimate channel is independent of the jamming channel to the destination. For each scenario, we derive the expression of secrecy outage probability of the proposed secure cooperative system, respectively. Numerical results show that the channel correlation has significant impacts on the secrecy outage probability of the secure cooperative system.