基于LEO增强的COMPASS导航系统抗干扰能力研究  

Capabilities of LEO Enhanced COMPASS Navigation System for Anti-jamming

作　　者：邓琳[1] 李广侠[2] 田世伟[3] 刘仁甫[1] 

机构地区：[1]解放军理工大学通信工程学院研究生1队,江苏南京210007 [2]解放军理工大学通信工程学院训练部 [3]解放军理工大学通信工程学院研究生2队

出　　处：《军事通信技术》2012年第2期65-69,80,共6页Journal of Military Communications Technology

基　　金：国家高新技术研究发展计划(863计划)资助项目(2008AA12Z307)

摘　　要：随着COMPASS系统在民用、军事等应用领域的不断扩展和深入,用户对接收机抗干扰性能要求也会越来越高。在干扰条件下,采用低轨道(LEO)通信卫星对COMPASS系统进行增强是一种比较有效的星基增强方法。文章从信号增强的角度出发,以LEO卫星所播发的导航增强信号为依据,研究LEO增强信号所能容忍的压制干扰的干信比作为衡量增强信号的抗干扰能力指标。首先介绍基于LEO通信卫星增强的COMPASS系统组成及工作原理;其次分析干扰链路的影响;然后通过计算,对LEO卫星播发的增强信号能量及抗干扰性能进行分析;最后,提出一些措施改善增强信号的抗干扰能力。结果表明,经改善后的LEO通信卫星播发的导航增强信号可容忍50dB左右的干信比,与GPS中M码信号的抗干扰能力相当。With the development of COMPASS in civilian and military domain, the request of anti-jamming performance is becoming more and more demanding. Adopting LEO communication satellite system to enhance COMPASS positioning and timing performance is an effective way, es- pecially under jamming. In the angle of signal enhanced, the anti-jamming performance of en- hanced signal broadcasted by LEO satellites was researched. Firstly, the system model and the work principle of LEO enhanced system was introduced. Secondly, the effects of the interfering link were analyzed. Then via the calculations of the enhanced signals from LEO satellites, the an- ti-jamming performance of the enhanced signal was analyzed. Finally, some measures were pro- posed to improve the anti-jamming performance of the enhanced signal. The results show that the enhanced signal can tolerate about 50 dB jamming to signal ratio, and the ability of anti-jamming is equal to GPS M-code.

关 键 词：北斗 低轨卫星 抗干扰 

分 类 号：TN967.1[电子电信—信号与信息处理]