GNSS Multipath Error Correction Based on Empirical Wavelet Transform
Abstract Multipath error is the main factor affecting the measurement accuracy of GNSS and the difficulty of error correction. Combining the advantages of empirical wavelet transform(EWT) algorithm in the decomposition of complex signals with the daily repetition characteristics of GNSS multipath error, we propose a new method of multipath error extraction and correction based on EWT. The screening coefficient is defined by combining the energy entropy with the correlation coefficient, and the points with significant changes are taken as the dividing points of the noisy components and the information components. A new denoising method based on EWT is established by denoising the noisy components and reconstructing the information components. Through the analysis of simulation and experiment data, it is shown that EWT can extract and correct the GNSS multipath error better than EMD and wavelet method.
Key words :
empirical wavelet transform
multipath error
denoising
GNSS
Cite this article:
LUO Yiyong,CHEN Qiang,HUANG Cheng. GNSS Multipath Error Correction Based on Empirical Wavelet Transform[J]. jgg, 2020, 40(11): 1153-1157.
LUO Yiyong,CHEN Qiang,HUANG Cheng. GNSS Multipath Error Correction Based on Empirical Wavelet Transform[J]. jgg, 2020, 40(11): 1153-1157.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2020/V40/I11/1153
[1]
DAI Kaiyang,SHAO Bo,XIONG Shuai,ZHANG Jian,LEI Zhezhe. Research on Validation Method of Multipath Error Characteristics of BDS-3 New Frequencies [J]. jgg, 2021, 41(9): 934-938.
[2]
LU Tieding,HUANG Jiawei,HE Xiaoxing,Lü Kaiyun. Short-Term Ionospheric TEC Prediction Using EWT-Elman Combination Model [J]. jgg, 2021, 41(7): 666-671.
[3]
ZHOU Yunyao,WANG Haibin,XIANG Ya,Lü Yongqing,QI Junwei,WU Huan,HE Bin. Application of Lifting Wavelet with Improved Threshold Function in Artificial Seismic Source [J]. jgg, 2021, 41(6): 639-645.
[4]
LU Tieding,HUANG Jiawei, LU Chunyang,HE Xiaoxing,QIAN Wenlong. Short-Term Ionospheric TEC Prediction Model Based on EWT-ARMA [J]. jgg, 2021, 41(4): 331-335.
[5]
NIE Shihai,ZHANG Xianyun,FU Ting,ZHAO Feifei. Soil Moisture Retrieval Based on BDS Triple-Frequency Phase Multipath Error [J]. jgg, 2021, 41(4): 374-377.
[6]
TANG Jun,LI Yinjian,GAO Xin. GNSS Deformation Monitoring Denoising Method Based on CEEMDAN [J]. jgg, 2021, 41(4): 408-413.
[7]
XIE Bo, SHI Fuqiang, MA Sheng, LI Feng. Micro-Seismic Signal Denoising Method Based on EWT-Component Threshold and SVD [J]. jgg, 2021, 41(3): 319-322.
[8]
WANG Haibin, ZHOU Yunyao, Lü Yongqing, XIANG Ya. Application and Discussion on Wavelet Threshold Method in Seismic Data Recorded by JCZ Series Ultra-Wideband Seismographs [J]. jgg, 2021, 41(3): 323-330.
[9]
XU Wei,Lü Zhiping,DONG Hang,KUANG Yingcai,YANG Kaichun,HUANG Hui. Gross Error Detection of GNSS Coordinate Time Series on Three-Dimensional Directions [J]. jgg, 2021, 41(10): 1018-1023.
[10]
MA Yifang,ZHOU Xiaohui. Analysis of Impact of the Satellite Antenna Phase Center Correction Model on Scale Parameters of Helmert Transformation [J]. jgg, 2021, 41(1): 39-42.
[11]
. [J]. jgg, 2020, 40(S1): 37-40.
[12]
. Wavelet Transform and Interference Elimination of Fixed-Point Deformation
Pressure Interference of Kuancheng Station [J]. jgg, 2020, 40(8): 860-864.
[13]
ZHANG Mingyuan, ZHOU Xingyu, CHEN Hua. Quality Analysis and Constellation Geometric Performance Evaluation of New Signals B2a and B2(B2a+b) of BDS-3 [J]. jgg, 2020, 40(6): 629-633.
[14]
Lü Zheng,FENG Wei,HUANG Dingfa. Using GNSS Signal-to-Noise Ratio to Measure Dam Water Level Changes [J]. jgg, 2020, 40(2): 146-151.
[15]
GAN Ruo,CHEN Tianwei,ZHENG Xudong,DUAN Qingda,PAN Mei. Research on Denoising of Deformation Monitoring Data by Improved Wavelet Threshold Function [J]. jgg, 2020, 40(1): 17-22.