论文标题
接收天线选择，以进行安全的预编码辅助空间调制
Receive Antenna Selection for Secure Pre-coding Aided Spatial Modulation
论文作者
论文摘要
在本文中，我们借助人造噪声对安全预编码辅助空间调制（PSM）系统进行了接收天线选择（RAS）策略进行了研究。由于缺乏安全PSM系统中的保密率（SR）的闭合形式表达，因此很难优化RAS。为了解决此问题，截止率用作SR的近似值。此外，分别以低和高信噪比（SNR）区域得出了两种用于最大化SR的低复杂性RAS方案，称为MAX-SR-L和MAX-SR-H。由于前者在低SNR区域的运作良好，但在中等和高SNR区域也会变得更糟，而后者也存在类似的问题，因此提出了一种新型的RAS策略Max-SR-A来覆盖所有SNR区域。仿真结果表明，所提出的MAX-SR-H和MAX-SR-L方案分别在高和低SNR区域中详尽搜索（ES）的最佳SR性能。特别是，所提出的Max-SR-A的SR性能接近最佳ES的SR性能，并且比几乎所有SNR区域中随机方法的SR性能都更好。
In this paper, we make an investigation of receive antenna selection (RAS) strategies in the secure pre-coding aided spatial modulation (PSM) system with the aid of artificial noise. Due to a lack of the closed-form expression for secrecy rate (SR) in secure PSM systems, it is hard to optimize the RAS. To address this issue, the cut-off rate is used as an approximation of the SR. Further, two low-complexity RAS schemes for maximizing SR, called Max-SR-L and Max-SR-H, are derived in the low and high signal-to-noise ratio (SNR) regions, respectively. Due to the fact that the former works well in the low SNR region but becomes worse in the medium and high SNR regions while the latter also has the similar problem, a novel RAS strategy Max-SR-A is proposed to cover all SNR regions. Simulation results show that the proposed Max-SR-H and Max-SR-L schemes approach the optimal SR performances of the exhaustive search (ES) in the high and low SNR regions, respectively. In particular, the SR performance of the proposed Max-SR-A is close to that of the optimal ES and better than that of the random method in almost all SNR regions.
