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Doppler Differential Positioning Technology Using the BDS/GPS Indoor Array Pseudolite System.

Xingli Gan1,2, Baoguo Yu3,4, Lu Huang5,6

  • 1State Key Laboratory of Satellite Navigation System and Equipment Technology, Shijiazhuang 050081, China. ganxingli@163.com.

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|October 24, 2019
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Summary
This summary is machine-generated.

Indoor positioning is challenging due to signal blockage. A new Beidou satellite navigation system (BDS)/GPS indoor array pseudolite system with Doppler differential positioning achieves sub-centimeter accuracy, overcoming traditional limitations.

Keywords:
Beidou satellite navigation system (BDS)Doppler differential positioningarray pseudolitecycle-slipdilution of precisionindoor positioning

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Area of Science:

  • Navigation Systems
  • Geomatics Engineering
  • Signal Processing

Background:

  • Global Satellite Navigation Systems (GNSS) fail indoors due to signal obstruction.
  • Conventional pseudolite systems face challenges in time synchronization and ambiguity resolution.

Purpose of the Study:

  • To propose a Beidou satellite navigation system (BDS)/GPS indoor array pseudolite system.
  • To enhance indoor positioning accuracy and coverage using Doppler differential positioning.

Main Methods:

  • Developed an indoor array pseudolite system integrating BDS and GPS.
  • Implemented a Doppler differential positioning algorithm utilizing Doppler difference equations and Known Point Initialization (KPI).
  • Proposed Doppler-aided cycle-slip detection (DACS) and carrier phase double difference cycle-slip detection (CPDD).

Main Results:

  • Achieved average positioning errors of 7.86 mm (kinematic) and 2.9 mm (static).
  • Demonstrated potential for sub-centimeter precision in indoor positioning.
  • Identified Dilution of Precision (DOP) and cycle-slips as significant error sources.

Conclusions:

  • The BDS/GPS indoor array pseudolite system offers high-precision indoor localization.
  • The Doppler differential positioning algorithm effectively improves accuracy and coverage.
  • Advanced cycle-slip detection methods are crucial for maintaining positioning accuracy.