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A New Method for Multipath Filtering in GPS Static High-Precision Positioning.

Ke Han1, Canyang Tang2, Zhongliang Deng3

  • 1School of Electronic Engineering, Beijing University of Posts and Telecommunications, No. 10 Xitucheng Road, Beijing 100876, China. hanke@bupt.edu.cn.

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|June 19, 2019
PubMed
Summary
This summary is machine-generated.

This study introduces a new wavelet packet algorithm (WP-TD) to improve Global Positioning System (GPS) static high-precision positioning by reducing multipath errors. The method enhances positioning accuracy by effectively filtering noise and minimizing edge effects.

Keywords:
GPS static high-precision positioningmultipathtwo-dimensional moving weighted average algorithmwavelet packet algorithm

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Area of Science:

  • Geomatics Engineering
  • Signal Processing
  • Satellite Navigation Systems

Background:

  • Multipath interference is a primary error source in short-baseline Global Positioning System (GPS) static high-precision positioning.
  • Traditional wavelet transform (WT) methods for multipath mitigation struggle with high-frequency noise and edge effects.

Purpose of the Study:

  • To propose a novel wavelet packet algorithm (WP-TD) for more effective multipath extraction in GPS positioning.
  • To enhance the accuracy of static high-precision GPS positioning by mitigating multipath errors.

Main Methods:

  • Developed a wavelet packet algorithm incorporating two-dimensional moving weighted average processing (WP-TD).
  • Introduced a method to determine optimal wavelet packet decomposition layers for static positioning repeatability.
  • Applied the extracted multipath to GPS double difference (DD) coordinate sequences for correction.

Main Results:

  • The WP-TD algorithm effectively filters high-frequency white noise and reduces edge effects.
  • Optimized decomposition layers improve multipath extraction efficiency.
  • Corrected positioning accuracy showed a 14.14% improvement compared to traditional WT methods.

Conclusions:

  • The proposed WP-TD algorithm offers a significant advancement in GPS multipath mitigation.
  • This method enhances the reliability and accuracy of static high-precision positioning systems.
  • The findings are crucial for applications demanding precise GPS coordinates.