文档介绍：中图分类号: TN85 文献标识码: A 文章编号: 1009 - 2552( 2011) 03 - 0068 - 04
压制干扰对 GPS 接收机码跟踪环的性能影响分析
汤俊杰1,2 ,薛磊1 ,林航1 ,李得申2
( 1. 电子工程学院,合肥 230037; 2. 63880 部队,洛阳 471003)
摘要: 压制干扰是 GPS 接收机面临的重要的人为威胁之一,对伪码跟踪的跟踪测距精度产生
影响,甚至导致伪码跟踪环失锁。干扰对伪码跟踪环的影响模型涉及许多因素,建模比较困难。
以常用的非相干超前减滞后功率延迟锁定环为例,建立了码跟踪环在宽带噪声干扰、窄带干扰
和点频干扰下的跟踪误差模型,比较了压制干扰对 C /A 码和 P( Y) 码跟踪环性能的不同影响。
通过对不同干扰方式下 C /A 码和 P( Y) 码跟踪误差的仿真,得出了对 C /A 码和 P( Y) 码跟踪环
性能影响较大的干扰方式和干扰频率,为 GPS 接收机干扰方法和抗干扰措施的选择提供了理论
依据。
关键词: 压制干扰; 全球定位系统; 码跟踪环; P( Y) 码
Analysis of the performance of the code tracking loop of
GPS receiver under blanket jamming
TANG Jun-jie1,2 ,XUE Lei1 ,LIN Hang1 ,LI De-shen2
( 1. Electronic Engineering Institute,Hefei 230037,China; 2. Unit 63880,PLA,Luoyang 471003,China)
Abstract: As a vital kind of man-made threat faced with GPS receiver ,blanket jamming influences
measurement error of code tracking ,even leads to lose lock of code tracking loop. The foundation of the
mode of the impact of jamming is very difficult because plication. Taking example for the familiar
DLL of noncoherent early-late processing,the mode of tracking error based on broadband noise jamming,
narrowband jamming and CW jamming is founded and the performance of the code tracking loop of C /A
code and P ( Y) code under blanket jamming pared. The simulation results indicated a given
jamming mode and jamming frequency exert more in