In this paper, the physical layer (PHY) security performance for a coordinate interleaved orthogonal design (CIOD) for space–time coding system with transmit antenna selection scheme (TAS) is analyzed and evaluated. As an important performance measure for the PHY security in the wireless systems, closed-form expression is derived for the secrecy outage probability (SOP) of a CIOD space–time coding system, where transmit antennas selection is employed. Using the numerical results obtained from the derived closed-form expression, the SOP performance of the CIOD with TAS is presented and compared with that of the classical orthogonal space–time block coding (OSTBC) system, in which Alamouti coding and transmit antenna selection scheme is employed. We show that the CIOD with transmit antenna selection can provide a superior secrecy performance than the Alamouti-OSTBC system with TAS. To verify the analysis we also provide the Monte Carlo simulation results to show the accuracy of the results obtained from theoretical expressions derived in this paper.

本文针对具有发射天线选择方案（TAS）的时空编码系统的坐标交错正交设计（CIOD）的物理层（PHY）安全性能进行了分析和评估。作为无线系统中PHY安全性的一项重要性能指标，对于采用发送天线选择的CIOD时空编码系统的保密中断概率（SOP），可以得出闭式表达式。使用从导出的封闭式表达式获得的数值结果，介绍了带有TAS的CIOD的SOP性能，并将其与经典的正交空时块编码（OSTBC）系统的SOP性能进行比较，在传统的正交空时块编码系统中，Alamouti编码和发射天线选择方案被雇用。我们证明，带有发射天线选择的CIOD可以比具有TAS的Alamouti-OSTBC系统提供更高的保密性能。为了验证分析结果，我们还提供了蒙特卡洛模拟结果，以显示从本文得出的理论表达式获得的结果的准确性。