We investigate physical layer security (PLY) of space–time-block-coded (STBC)–multi-input–multi-output (MIMO) wiretap channel in the presence of imperfect channel state information (ICSI) over Rician fading channel. Secrecy for data transmission to legitimate user in the presence of eavesdropper is metered in terms of average secrecy capacity (ASC), probability of non-zero secrecy rate (PNZSR) and secrecy outage probability (SOP). We derive the closed form expression for security parameter by using the probability distribution function and cumulative distribution function of output signal to noise ratio (SNR). Simulation results are presented to validate our analytical results and demonstrate the impact of ICSI on the secrecy performance of STBC–MIMO system.

我们研究了在Rician衰落信道上存在不完善的信道状态信息（ICSI）的情况下，时空编码（STBC），多输入多输出（MIMO）窃听信道的物理层安全性（PLY）。根据平均保密容量（ASC），非零保密率（PNZSR）和保密中断概率（SOP）来计量在存在窃听者的情况下向合法用户传输数据的保密性。利用输出信号的信噪比（SNR）的概率分布函数和累积分布函数，推导了安全参数的闭式表达式。给出仿真结果以验证我们的分析结果并证明ICSI对STBC-MIMO系统的保密性能的影响。