Abstract: The outage performance of the secure cooperative system over correlated Rayleigh fading channels is investigated. Assuming that the transmitter knows the full channel state information 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. Besides, in this cooperative system, the legitimate channel is correlated with the jamming channel to the destination, and the wiretap channel is correlated with the jamming channel to the eavesdropper. For this scenario, the expression of secrecy outage probability of the proposed secure cooperative system is derived. Numerical results show that the channel correlation has significant impacts on the secrecy performance of the secure cooperative system.

Key words: secure cooperative system, secrecy outage probability, channels, correlation

摘要： 基于相关的瑞利衰落信道，研究安全协作系统的安全中断性能。假定发送端知道全部信道的信道状态信息，系统中存在单个窃听节点以及多个进行协作的中继节点，某个中继节点被选择作为干扰者来发送干扰信号，合法信道与干扰节点到目的节点的信道相关，窃听信道与干扰节点到窃听节点的信道也相关。在此类协作场景中，分析了信道相关性对安全协作系统安全性能的影响，获得了安全中断概率表达式。数值结果表明信道相关对安全协作系统的安全性能存在显著影响。

关键词: 安全协作系统, 安全中断概率, 信道, 相关性