延迟锁定环的多径跟踪误差分析

Analysis of Multipath Tracking Error with Delay-Locked Loop

在无线电导航定位系统,多径干扰成为一种主要的测距误差源。文中研究了超前滞后非相干锁定环路的数学模型,并分析了多径干扰对跟踪环路误差的影响。给出了采用窄带相关器和多径估计技术减小多径跟踪误差的方法,理论分析和仿真结果验证了采用该方法能够有效提高测距精度。

In radio navigation position system.Multipath becomes a main error source of measurement.In this paper the module of early-late delay lock loop and multipath tracking errors on pseudo range were studied.Two methods of multipath elimination technique utilizing narrow correlator and multipath estimation technique were given,the theoretic analysis and simulation results indicate that the methods are efficient in improving the precision of ranging.