卫星导航系统中多址干扰引起的伪码跟踪误差的分析

Study on PN Code Tracking Error caused by Multi-user Interference in Satellite Navigation System

本文基于非相干延迟锁定环的伪码跟踪体制,研究多址干扰对伪码跟踪误差的影响,通过理论推导给出了存在多址干扰条件下最大跟踪误差的解析表达式,分析了影响多址误差的多种因素,得到了多址误差随干扰信号频率和相位的变化规律。研究结果可对进一步分析多址干扰影响和克服多址误差提供理论依据。

In this paper, PN code tracking error caused by multi-user interference is studied. The study is based on noncoherent DLL which is often used in satellite navigation receiver. Analytic expression about multi-user error is educed, and several factors suffering the error,including amplitude,frequency and phase of multi-user interference signal, DLL early-late spacing,ete,are referred. Research result provides theoretical base for analyzing multi-user effect and mitigating multi-user error.