一种基于扩频序列加权的干扰抑制跳空物理层安全通信系统  

A Space Hopping Physical Layer Security Communication System for Interference Suppression Based on the Characteristic of Spread Sequence

作　　者：郭志军 董国英 洪涛[2] 赵伟杰 GUO Zhi-jun;DONG Guo-ying;HONG Tao;ZHAO Wei-jie(Shanghai Radio Equipment Research Institute,Shanghai 200090,China;Nanjing University of Posts and Telcommunications,Nanjing Jiangsu 210023,China)

机构地区：[1]上海无线电设备研究所,上海200090 [2]南京邮电大学,江苏南京210023

出　　处：《制导与引信》2018年第1期51-56,共6页Guidance & Fuze

基　　金：上海市科学技术委员会资助项目(编号:16DZ1120901)

摘　　要：为了解决基于分布式天线的跳空物理层安全通信技术中敌对方在窃听通信信息的同时发射干扰信号干扰合法用户正常通信的问题,提出了一种基于扩频序列的加权跳空发射方案,发射机加权系数和跳空图案不仅与收发天线之间的信道信息相关,而且与通信双发约定的扩频序列有关。在敌对方发射干扰信号的情况下,期望接收机仍然可以按跳空图案加权累积相关解调接收信号。仿真结果表明:在跳空天线数目足够的条件下对于干扰信号具有一定的抑制效果,是一种在实际电子对抗环境中更具有现实意义的跳空物理层安全通信技术。To solve the problem of suppressing the interference signal transmitted by eavesdropper for the distributed multi-antenna space hopping wireless communication system,a weighting scheme based on the characteristic of spread sequence is proposed.The weighted coefficient is not only associated with the channel state information but also with the appointed spread sequence between the transmitter and the desired receiver.In this way,the desired receiver would employ the accumulation correlation technique to demodulate the receive signal according to the space hopping pattern in the condition that eavesdropper transmits the interference signal.Simulation results show that the proposed signal has a certain anti-jamming characteristic when the transmitter equips with enough antenna number.The proposed weighting scheme has more practical significance in electronic countermeasure environments for the space hopping physical layer security communication technique.

关 键 词：无线通信 物理层安全 跳空 干扰抑制 

分 类 号：TN92[电子电信—通信与信息系统]