GPS接收机跟踪环压制干扰效果分析  

Analysis of GPS Receiver Tracking Loop Jamming Effect

作　　者：张坤 曾芳玲 欧阳晓凤 赵元[1] 唐进迎 ZHANG Kun;ZENG Fang-ling;0UYANG Xiao-feng;ZHAO Yuan;TANG Jin-ying(National University of Defense Technology,College of Electronic Engineering,Anhui Hefei 230037,china)

机构地区：[1]国防科技大学电子对抗学院,安徽合肥230037

出　　处：《现代防御技术》2018年第6期109-114,共6页Modern Defence Technology

基　　金：国防预研基金(41101020207)

摘　　要：为了更准确地实现对导航干扰的性能评估和功能验证,针对GPS跟踪过程常用的Costas载波跟踪环和非相干超前减滞后延迟锁定环,提出用载波相位误差和码相位误差2个重要指标衡量对接收机的干扰效果,并在不同干扰场景下对上述指标进行了仿真分析。仿真结果表明:随着干信比的升高或者在相同干信比条件下,随着干扰带宽变小,载波环误差和码环误差均会增加。即干扰效果与干扰功率成正相关,与干扰带宽成负相关;且干扰下的载波环跟踪误差通常比码跟踪误差小几个量级。仿真结果也初步验证了该评估方法的合理性。To achieve more accurate performance evaluation and functional verification of navigation interference,this essay used two important indicators of carrier phase error and code phase error to measure the interference effect on the receiver for the Costas carrier tracking loop and incoherent lead-delaydelayed-delay-locked-loop commonly used in the GPS tracking process.The above indicators were simulated under different interference scenarios.The simulation results showed that with the increase of the noise to noise ratio or under the same noise to noise ratio,as the interference bandwidth decreases,the carrier phase error and the code phase error deteriorated.That is,the interference effect was positively correlated with the interference power and negatively correlated with the interference bandwidth.The carrier loop tracking error under interference was usually several orders of magnitude smaller than the code tracking error.The simulation results verified the rationality of the assessment method.

关 键 词：导航干扰 载波相位误差 码相位误差 跟踪性能 干扰效果 评估方法 

分 类 号：T228.4[一般工业技术] TN972[电子电信—信号与信息处理]