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An Environmentally-Adaptive Positioning Method Based on Integration of GPS/DTMB/FM.

Li Cong1, Haidong Wang2, Honglei Qin3

  • 1School of Electronic and Information Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing 100191, China. congli_bh@buaa.edu.cn.

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Summary
This summary is machine-generated.

This study introduces a novel positioning method combining Global Positioning System (GPS), Digital Terrestrial Multimedia Broadcast (DTMB), and FM radio signals. The integrated approach significantly enhances positioning accuracy in challenging environments compared to GPS alone.

Keywords:
Digital Terrestrial Multimedia BroadcastExtended Kalman FilterFuzzy Inference SystemGlobal Positioning Systemenvironmentally adaptivefrequency modulation

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Area of Science:

  • Navigation Systems
  • Signal Processing
  • Geomatics Engineering

Background:

  • Global Positioning System (GPS) offers high accuracy in open areas but degrades in complex environments like urban canyons and forests.
  • Existing positioning systems struggle with reliability and precision in obstructed signal environments.
  • Need for robust positioning solutions in diverse and challenging geographical locations.

Purpose of the Study:

  • To develop and evaluate a novel hybrid positioning method integrating GPS, Digital Terrestrial Multimedia Broadcast (DTMB), and Frequency-Modulated (FM) radio signals.
  • To improve positioning accuracy and reliability in complex environments where GPS performance is compromised.
  • To introduce an adaptive sensor fusion scheme for optimal integration of multiple positioning signals.

Main Methods:

  • Integration of GPS with DTMB signals, utilizing DTMB transmitters as pseudo-satellites.
  • Application of FM fingerprint positioning to correct GPS-induced positioning biases.
  • Development of an adaptive selection scheme for dynamic sensor mode optimization.
  • Conducting field experiments in complex environments to validate the proposed method.

Main Results:

  • The proposed hybrid positioning method demonstrated significant improvements in accuracy.
  • Positioning accuracy was enhanced by at least 68.21% compared to GPS-only systems.
  • A 21.27% improvement in positioning accuracy was observed compared to a GPS + DTMB integrated approach.
  • The system proved effective in complex environments, overcoming signal degradation issues.

Conclusions:

  • The integrated GPS, DTMB, and FM positioning method offers a robust solution for accurate navigation in challenging environments.
  • Adaptive sensor fusion is crucial for optimizing performance across varying environmental conditions.
  • This hybrid approach significantly outperforms traditional GPS and dual-sensor systems in complex settings.