杨威, 张秋昭, 马晓东,等.基于小波分解与恒星日滤波的BDS多路径削减方法[J].河南理工大学学报（自然科学版）,2022,41(4):58-64.

YANG W, ZHANG Q Z, MA X D,et al.Strategy for BDS multipath mitigation based on wavelet decomposition and sidereal filter[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(4):58-64.

基于小波分解与恒星日滤波的BDS多路径削减方法

杨威1, 张秋昭1, 马晓东2

1.中国矿业大学 环境与测绘学院，江苏 徐州221116;2.中铁大桥勘测设计院集团有限公司，湖北 武汉 430051

摘要:针对北斗卫星导航系统（Beidou satellites navigation system ， BDS）星座特点及多路径重复 特性，基于单差残差重构和小波分解，提出一种恒星日滤波与小波结合的多路径削减方法，该方法基于观测值域重构载波相位和伪距单差残差，利用小波分解提取多路径误差，对每颗BDS卫星分别进行多路径误差改正，最后采用LAMBDA算法单频单历元解算基线。试验表明，该方法能有效削弱多路径误差，使E，N和U精度分别提升40.1% ，43.5%和37.9%。

关键词:北斗卫星导航系统;多路径误差;恒星日滤波;单差残差;小波分解

doi:10.16186/j.cnki.1673-9787.2020090077

基金项目:国家自然科学基金资助项目（42074226，41504032）

收稿日期:2020/09/18

修回日期:2020/11/01

出版日期:2022/07/15

Strategy for BDS multipath mitigation based on wavelet decomposition and sidereal filter

YANG Wei1, ZHANG Qiuzhao1, MA Xiaodong2

1.School of Envirowment and Spatial Informatics，China University of Mining and Technology， Xuzhou 221116， Jiangsu， China;2.China Railway Bridge Survey and Design Institute Group Co.， Ltd.，Wuhan  430051，Hubei，China

Abstract: According to the characteristics of BDS constellation and multipath , a multipath mitigation method based on sidereal filter and wavelet decomposition was proposed. Based on reconstruction of single difference residuals and wavelet decomposition,multipath error was extracted from observation domain of both phase and code single difference residuals that were reconstructed. The multipath error was corrected on each BDS satellite respectively and then the baseline was calculated by single frequency single epoch LAMBDA algorithm.Finally, experimental result showed that this method could effectively reduce multipath errors and accuracies were increased by 40.1%,43.5%,and 37.9% respectively in E,N and U directions.

Key words:BDS;multipath error;sidereal filtering;single difference residual;wavelet decomposition

基于小波分解与恒星日滤波的BDS多路径削减方法_杨威.pdf