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Performance Improvement of Time-Differenced Carrier Phase Measurement-Based Integrated GPS/INS Considering Noise

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Summary
This summary is machine-generated.

This study integrates time-differenced carrier phase (TDCP) GPS with inertial navigation systems (INS), using a delayed state filter to enhance navigation accuracy. The novel approach significantly improves performance over conventional methods.

Keywords:
GPS/INSnoise correlationtime-differenced carrier-phase

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Area of Science:

  • Navigation Systems
  • Geomatics Engineering
  • Signal Processing

Background:

  • Accurate positioning is crucial for various applications.
  • Traditional Global Positioning System (GPS) and Inertial Navigation System (INS) integration faces challenges with noise correlation.
  • Time-differenced carrier phase (TDCP) measurements offer high-precision GPS data but require specialized filtering.

Purpose of the Study:

  • To develop an integrated GPS/INS navigation system that accounts for noise correlation.
  • To enhance the accuracy and reliability of navigation solutions using TDCP-based GPS.
  • To address the limitations of conventional Kalman filters with TDCP data.

Main Methods:

  • Combined a time-differenced carrier phase (TDCP)-based GPS with an inertial navigation system (INS).
  • Utilized a delayed state filter to manage TDCP data and noise correlation.
  • Incorporated process and measurement noise correlation into the filtering algorithm.

Main Results:

  • The integrated TDCP-GPS/INS system demonstrated improved accuracy and reliability.
  • Dynamic simulations showed performance improvements up to 70% compared to conventional algorithms.
  • Experimental results indicated performance improvements of up to 60%.

Conclusions:

  • The proposed TDCP-GPS/INS integration effectively handles noise correlation.
  • The delayed state filter significantly enhances navigation system performance.
  • This approach offers a more accurate and reliable navigation solution.