直扩通信信号低截获性能分析  

LPI Performance Analysis of Direct Sequence Spread Spectrum

作　　者：曾小东[1] ZENG Xiaodong(The 10th Research Institute of CETC,Chengdu 610036,China)

机构地区：[1]中国电子科技集团公司第十研究所,四川成都610036

出　　处：《无线电工程》2020年第11期917-920,共4页Radio Engineering

基　　金：“十三五”装备预研基金资助项目。

摘　　要：针对通信系统中,直接序列扩频(直扩)信号的低截获性能评估问题,介绍了直扩信号的被截获原理,提出了低截获性能评估的指标体系,研究了直扩信号对抗截获接收机的机理,分析了被截获距离、截获因子以及被检测概率。仿真结果表明,直扩信号能够降低被截获距离70%以上,截获因子小于1,并且在150 km以外的被检测概率小于1%,符合低截获性能的指标要求。Aiming at the problem of low probability of intercept(LPI)performance evaluation of direct sequence spread spectrum signals,the principle of interception of direct sequence spread spectrum signals is introduced firstly.Then an index system of LPI performance evaluation is proposed,the mechanism of the direct sequence spread spectrum signal against intercept receiver is studied.The interception distance,interception factor and detection probability of direct sequence spread spectrum signals is analyzed.The simulation results show that the direct sequence spread spectrum signals can reduce the interception distance by more than 70%,the interception factor is less than 1,and the detection probability beyond 150km is less than 1%,which meets the index requirements.

关 键 词：通信 直接序列扩频 被截获距离 截获因子 被检测概率 

分 类 号：TN925[电子电信—通信与信息系统]