%0 Journal Article
%T Adaptive multipath mitigation algorithm for GPS C/A code track-ing loop<br>GPS码跟踪环自适应多径消除算法
%A QIN Xinxian
%A HAN Chengde
%A XIE Yingke
%A <br>覃新贤
%A 韩承德
%A 谢应科
%J 遥感学报
%D 2010
%I 
%X Multipath not only degrades the sensitivity of a GPS receiver,but also becomes the dominant error resource in GPSpositioning systems. Multipath mitigation algorithm is the most significant in high sensitive and high accuracy GPS receivers. In this paper,multipath signal model in code tracking loop is studied first and a novel method for mitigation of multipath is presented which employs adaptive filtering recursive least square (RLS) algorithm. The system parameters need not be estimated in adaptive filtering algorithm and multipath signal can be filtered out directly. Under noisy scenario,the RLS algorithm is the best estimate for the filter weights with minimum least-squares errors. Simulation results show that the proposed method can reduce multipath error envelope effectively. The crossing-zero bias of the discriminator can be corrected which enhances the accuracy of code tracking in GPS receiver's delay-locked loop (DLL). The most importance is that the RLS algorithm is recursive and convenient to implement both in hardware and software.
%K GPS
%K multipath
%K tracking loop
%K adaptive filter
%K error envelope<br>GPS卫星定位
%K 多径
%K 跟踪环
%K 自适应滤波
%K 误差包络
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=A41A70F4AB56AB1B&jid=F926358B31AC94511E4382C083F7683C&aid=68845B2B6A7F716DD64E72CB9959134C&yid=140ECF96957D60B2&vid=F3583C8E78166B9E&iid=0B39A22176CE99FB&sid=4966445AEEBA9556&eid=6A73B36E85DB0CE9&journal_id=1007-4619&journal_name=遥感学报&referenced_num=0&reference_num=18