无线信道中多天线系统的物理层安全技术研究

Physical Layer Security of Multi-antenna System in Wireless Channels

无线通信传输媒介本质上的广播特性,使得无线通信系统的安全问题得到广泛的关注与研究。物理层安全技术主要是基于传输信道具有随机性这一特点,利用编码调制等技术来实现信息的安全传输,是下一代5G通信中实现无线网络安全的重要研究内容。因此,针对多天线系统中的物理层安全问题,重点介绍实现物理层安全常见的几类技术,给出评价安全性能的理论指标,仿真分析多天线系统中节点天线配置、信道衰落程度、链路传输质量等参数对系统安全性能的影响,同时对无线信道中物理层安全值得研究的方向进行展望。

With the rapid development of wireless communication, the security of MIMO（multiple-input-multiple-output） systems gradually attracts more and more attention. By utilizing the characteristics of channels, physical layer security technology provides a new idea for the secure transmission of wireless communication systems. In this paper, several physical layer security methods are described, and the definition of SOP（secrecy outage probability） elaborated. Finally, via simulation, the qualitative relationship of between SOP and the number of nodes, SOP and the signal-to-noise ratio of the channel are analyzed respectively.