基于压缩感知的协作系统物理层安全分析

The Physical Layer Security in Cooperative System Based on Compressed Sensing

将压缩感知技术引入协作通信系统中研究其物理层安全问题.在多源多中继协作通信系统中,将源节点通过中继节点到目的节点,源节点到窃听节点的信道矩阵作为压缩感知的测量矩阵,目的节点和窃听节点可以采用信号重构算法进行重构.通过系统仿真证明,窃听节点存在对信道估计存在误差,合法目的节点的重构性能优于窃听节点,可以达到安全传输.

Compressed Sensing（CS） is introduced to the cooperative system with a wiretap channel to study the physical layer security. In the multiple sources and multiple relays cooperative system, the channel matrix between source and relays and eavesdroppers is considered as the measurement matrix. The signal is recovered by destination node and the eavesdroppers using CS recovery algorithm. The simulation results show that the recovery performance is better than that of the eavesdroppers, because the eavesdroppers cannot get the accurate channel state information to recover the signal correctly. The system can achieve secrecy transmission