GPS接收机多径抑制算法研究  

Study on Multipath Suppression Algorithm of GPS Receiver

作　　者：刘拥军[1] 胡捍英[1] 王大鸣[1] 

机构地区：[1]解放军信息工程大学通信工程系,郑州450002

出　　处：《电子对抗》2009年第3期27-30,46,共5页Electronic Warfare

基　　金：国防预先研究项目（40901010201）

摘　　要：研究了窄相关、多径估计延迟锁相环算法（MEDLL）和基于斜率估计（ELS）的GPS接收机多径抑制算法，重点研究了ELS算法，该算法可以在一定的预相关带宽的前提下，通过对相关峰两边的斜率进行估计，达到抑制多径造成的跟踪误差的效果。仿真结果表明，ELS的算法在性能上比窄相关技术更好，接近于MEDLL算法。该算法相对于窄相关技术资源规模增加不大，比MEDLL算法资源规模和计算量都要小很多，易于在硬件上实时实现。The narrow correlator spacing algorithm, Multipath Estimations Delay Lock Loop （MEDLL） and Early Late Slope（ELS） suppress this paper, and the EI..S algorithm is studied as suppress code tracking error caused by muhipath multipath algorithms of GPS receiver are studied in an important point, this algorithm can effectively through estimating slope of both sides of correlation function peak in the addition of adequacy pre-correlation bandwidth. The simulation results show that the performance of the slope estimation algorithm is better than narrow correlator spacing algorithm, and close to Muhipath Estimations Delay Lock Loop algorithm. But the slope estimation algorithm is propitious to implement in hardware, because it needs less correlators and simple algorithm.

关 键 词：GPS 多径 MEDLL 窄相美 ELS 

分 类 号：TN911.7[电子电信—通信与信息系统] P228.4[电子电信—信息与通信工程]