摘要
分析了多径环境下扩频导航接收机信号跟踪性能。主要分析了时延绝对值小于一个码片的多径信号对导航信号伪码相位和载波相位跟踪误差的影响,给出了接收机伪码跟踪环和载波相位跟踪环的结构框图,并建立了两个跟踪环的数学模型,在考虑多径信号的基础上分析了混合信号相位跟踪的数学模型,分析了混合信号下伪码跟踪环和载波相位跟踪环相位跟踪的性能。在数学模型分析的基础上对存在单路多径信号时伪码相位跟踪和载波相位跟踪性能进行了计算机仿真。
The signal tracking performance of DS/BPSK navigation receiver under the multipath environment was researched in the paper. The influence of multipath signal which delay was smaller than a chip to the PN code tracking error and carrier tracking error was analyzed. The hardware implementation of the signal code and carrier tracking scheme was provided, and the mathematics mode of the signal tracking system was presented both the multipath was absent and present. The phase tracking and measurement performance was analyzed when the receiver signal was composite signal. Based on the analyses of tracking mathematics, the paper gave some simulations of the tracking loop performance.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2008年第4期1252-1257,共6页
Journal of Astronautics
关键词
多径干扰
直接序列扩频
跟踪性能
导航接收机
Multipath interference
DS-SS
Tracking performance
Navigation receiver
Simulink simulation
作者简介
沈锋（1981-），男，博士研究生，讲师，研究方向为扩频通信，信号处理，无线电导航。通信地址：哈尔滨市南岗区南通大街145号-31楼（150001）电话：（0451）82519376—606.E-mail：sf407@126．com
