摘要
本文研究GPS系统中多径效应引起的伪距测量误差．先分析镜面多径信号的时间延迟和由此引起的频带扩展，然后研究在用相于和非相于延时销定环跟踪PN码信号时多径信号对S曲线的影响和由此带来的伪距测量误差（多径误差），以及减小多径误差的方法．
The pseudo-range error due to multipath effects in the GPS system is studied.First the time de lay of specular multipath aignals and its freqency bandwidth spread are analyzed.Then an extensive study is car ried out for the influence of multipath signals to the S-curves and the peudo-range errors when tracking the PN code signals with coherent and noncoherent delay lock loops.Moreover,several methods for reducing multipath er rors are proposed.
出处
《电子学报》
EI
CAS
CSCD
北大核心
1998年第3期10-14,共5页
Acta Electronica Sinica
基金
国家自然科学基金
