大地测量与地球动力学2017，Vol.37Issue(5)：462-466,5.DOI:10.14075/j.jgg.2017.05.005
基于EMD和小波的GPS/BDS变形监测中的多路径误差削弱方法
Multipath Mitigation Method by Combined EMD and Wavelet in GPS/BDS Deformation Monitoring
摘要
Abstract
This paper is concerned with the sidereal day repeat characteristics of the multipath error and high frequency random noise of calculated coordinates for real-time deformation monitoring.First,we apply the EMD and EMD combined with wavelet threshold de-noising methods,to the existing coordinates multipath time series model.Then,based on this model and through sidereal filtering,we weaken the multipath error of subsequent coordinates,which has a strong correlation with the model.The measured data processing results show that the EMD method can remove the high frequency random noise sequence and weaken the effect of multipath error of GPS/BDS real-time monitoring effectively,improving by 50％ the accuracy of real-time monitoring.The EMD and wavelet combined method is superior to single EMD filtering method.关键词
GPS/BDS变形监测/多路径/EMD/小波阈值去噪/恒星日滤波Key words
GPS/BDS deformation monitoring/multipath/EMD/wavelet threshold de-noising/sidereal filtering分类
天文与地球科学引用本文复制引用
易清根,刘心龙,刘万科..基于EMD和小波的GPS/BDS变形监测中的多路径误差削弱方法[J].大地测量与地球动力学,2017,37(5):462-466,5.基金项目
长江科学院开放研究基金(CKWV2016381/KY) （CKWV2016381/KY）
湖北省自然科学基金杰出青年基金(2015CFA039).Open Research Fund of CRSRI,No.CKWV2016381/KY （2015CFA039）
Natural Science Foundation for Distinguished Young Scholar of Hubei Province,No.2015CFA039. （）
