[1] Guo Shusen, Yu Xianwen, Long Fengyang, Wang Jiafu, et al. Combined filter method for weakening GNSS multipath error [J]. Journal of Southeast University (English Edition), 2022, 38 (2): 178-185. [doi:10.3969/j.issn.1003-7985.2022.02.010]

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Combined filter method for weakening GNSS multipath error()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

38

Issue:

2022 2

Page:

178-185

Research Field:

Surveying and Mapping and Navigation

Publishing date:

2022-06-20

Info

Title:

Combined filter method for weakening GNSS multipath error

Author(s):

Guo Shusen;  Yu Xianwen;  Long Fengyang;  Wang Jiafu

School of Transportation, Southeast University, Nanjing 211189, China

Keywords:

ensemble experience modal decomposition(EEMD);  wavelet analysis;  multipath error;  global navigation satellite system(GNSS)

PACS:

P228

DOI:

10.3969/j.issn.1003-7985.2022.02.010

Abstract:

A filter method that combines ensemble empirical modal decomposition(EEMD)and wavelet analysis methods was proposed to separate and correct the global navigation satellite system(GNSS)multipath error more effectively. In this method, the GNSS signal is first decomposed into several intrinsic mode functions(IMFs)and a residual through EEMD. Then, the IMFs and residual are classified into noise terms, mixed terms, and useful terms according to a combined classification criterion. Finally, the mixed term denoised by wavelet and the useful term are reconstructed to obtain the multipath error and thus enable an error correction model to be built. The measurement data provided by the Curtin GNSS Research Center were used for processing and analysis. Results show that the proposed method can separate multipath error from GNSS data to a great extent, thereby effectively addressing the defects of EEMD and wavelet methods on multipath error weakening. The error correction model established with the separated multipath error has a higher accuracy and provides a certain reference value for research on related signal processing.

References:

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Memo

Memo:

Biographies: Guo Shusen(1997—), male, Ph. D. candidate; Yu Xianwen(corresponding author), male, doctor, professor, njyxw@sina.com.
Foundation items: The National Natural Science Foundation of China(No. 41974030), the Postgraduate Research & Practice Innovation Program of Jiangsu Province(No. KYCX17_0150).
Citation: Guo Shusen, Yu Xianwen, Long Fengyang, et al.Combined filter method for weakening GNSS multipath error[J].Journal of Southeast University(English Edition), 2022, 38(2):178-185.DOI:10.3969/j.issn.1003-7985.2022.02.010.

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