信道预测天线选择的空时分组码物理层安全增强

针对延时发射天线选择(TASD)/正交空时分组码(OSTBC)无线通信系统,基于最小均方误差(MMSE)信道预测器,提出一种系统物理层安全增强方案。将MMSE信道预测方案应用于TASD/OSTBC无线通信系统,构成信道预测发射天线选择(TASP)/OSTBC无线通信系统,并对其推导瑞利块衰落信道上安全中断概率、非零安全容量概率以及渐近安全中断概率的解析表达式。在此基础上,分析主信道收发天线数、窃听者天线数和信道的归一化延时等参数对系统物理层安全性能的影响。数值计算和仿真结果表明,采用TASP可以提高OSTBC编码无线通信系统的物理层安全性能。

Physical Layer Security Enhancement of Space-Time Block Code Using Channel Prediction for Antenna Selection

Aiming at Transmit Antenna Selection with Delay(TASD)/Orthogonal Space-Time Block Code(OSTBC)wireless communication system,this paper proposes a system physical layer security enhancement scheme based on the Minimum Mean Square Error(MMSE)channel predictor.The MMSE channel prediction scheme is applied to the TASD/OSTBC wireless communication system to form a channel Transmit Antenna Selection with Prediction(TASP)/OSTBC wireless communication system.The analytical expressions of secrecy outage probability,non-zero secrecy capacity probability and asymptotic secrecy outage probability over the Rayleigh block fading channel are derived.On this basis,the effects of parameters such as the number of transmit and receive antennas on the main channel,the number of eavesdropper antennas,and the normalized delay of the channel on the security performance of the system physical layer are analyzed.Numerical calculations and simulation results show that using TASP can improve the physical layer security performance of OSTBC wireless communication system.