Abstract 5G wireless mobile communication system is faced with massive equipment access, information security and effective transmission is worth paying attention to. Wireless physical layer security mainly uses encryption principle to enhance the security of information transmission, while time reversal technology combines its electromagnetic characteristics and physical channel characteristics to improve the security performance of wireless communication system. In this paper, a signal transmission model of wireless multi-antenna communication system based on time reversal cavity is proposed and white Gaussian noise is introduced. The simulation results show that the space-time focusing characteristics of time reversal cavity can make the signal energy more concentrated on the target user, which can not only effectively alleviate the communication quality problems caused by multipath effect, but also ensure the security of information transmission process.

中文翻译：

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基于时间反转的多天线无线系统性能

摘要5G无线移动通信系统面临海量设备接入，信息安全和有效传输值得关注。无线物理层安全主要利用加密原理来增强信息传输的安全性，而时间反转技术则结合其电磁特性和物理信道特性来提高无线通信系统的安全性能。本文提出了一种基于时间反演腔的无线多天线通信系统信号传输模型，并引入了高斯白噪声。仿真结果表明，时间反转腔的时空聚焦特性可以使信号能量更加集中到目标用户，不仅可以有效缓解多径效应带来的通信质量问题，而且可以保证信息传输的安全。过程。