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Decawave UWB Clock Drift Correction and Power Self-Calibration.

Juri Sidorenko1,2, Volker Schatz3, Norbert Scherer-Negenborn3

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Summary

This study introduces novel methods to enhance Ultra-Wideband (UWB) positioning accuracy by addressing clock drift and signal power variations. These techniques improve two-way ranging (TWR) performance without extra hardware or traditional phase-locked loop (PLL) integrators.

Keywords:
navigationtime of arrival (TOA)ultra-wideband (UWB)

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Area of Science:

  • Engineering
  • Computer Science
  • Signal Processing

Background:

  • Decawave Ultra-Wideband (UWB) systems are crucial for precise positioning.
  • Position accuracy is significantly impacted by hardware delays, clock drift, and signal power variations.
  • Existing clock drift correction methods (e.g., PLL integrators) are sensitive to signal power fluctuations.

Purpose of the Study:

  • To develop new methods for clock drift and signal power correction in UWB systems.
  • To improve the accuracy of two-way ranging (TWR) without requiring additional measurement equipment.
  • To overcome the limitations of traditional phase-locked loop (PLL) integrators for clock drift correction.

Main Methods:

  • A novel approach for estimating signal power correction curves without extra hardware was developed.
  • A new method for clock drift correction was implemented, avoiding the use of PLL integrators.
  • The developed signal power and clock drift correction methods were integrated to enhance TWR.

Main Results:

  • The proposed methods effectively correct for signal power variations and clock drift.
  • The fused correction techniques demonstrated improved performance in two-way ranging (TWR).
  • Elimination of the need for additional measurement equipment simplifies the UWB positioning setup.

Conclusions:

  • The novel correction methods offer a more robust and hardware-efficient solution for UWB positioning.
  • The findings suggest a significant improvement in UWB positioning accuracy by addressing key error sources.
  • This work provides a practical advancement for UWB-based localization systems.