基于单向训练预补偿的双向跳空方法研究

Two-way Space Hopping Based on One-way Training with Pre-Compensation

为进一步解决传统0/1式跳空系统的物理层安全问题,安全通信的单向限制,同时提高系统训练效率,提出了一种基于单向训练预补偿的双向0/1式跳空方法。通信双方只需要通过一次单向训练,获取信道信息,利用此信道信息设计通信双方的预补偿系数,并对发射信号进行预补偿。接收方使用初始接收权值就可以对信号进行正确接收。最后计算出接收方和窃听方的接收信噪比和误比特率,并与预补偿反向训练0/1式跳空方法(BTM-PC)进行比较。理论分析和实验仿真表明,该方法能够有效地保障系统双向通信的安全性,提升系统的训练效率,同时在不降低合法用户的接收性能的情况下,提升系统的防窃听能力。

This paper proposes a two - way 0/1 space hopping system based on the one - way training method with pre - compensation for better physical layer security and training efficiency of the system while lifting the one way limit for secure communication in the traditional 0/1 space hopping system. The communication parties gain the channel information though the one - way training, and the compensation coefficient of the communication parties is designed with the channel information to compensate the transmission signals. Then the receiver can receive the signal correctly just using the initial receiving weights. Finally, the SNR and bit error rate of the receiver and eavesdropper are calculated, and compared with 0/1 space hopping technique using backward training method with Pre - Compensation （ BTM - PC）. Theoretical analysis and experimental simulation show that it can ensure the security of two - way communication, improve the training efficiency of the system and the ant - eavesdropping ability of the system without reducing the receiving performance of the legitimate - users.