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A Self-Calibrating Localization Solution for Sport Applications with UWB Technology.

Marco Piavanini¹, Luca Barbieri¹, Mattia Brambilla¹

¹Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Via Ponzio 34/5, 20133 Milan, Italy.

Sensors (Basel, Switzerland)

|December 11, 2022

Summary

This study presents a wireless ultrawide-band (UWB) localization system for consumer sports and leisure. It accurately estimates positions of access points and tags using novel algorithms, avoiding complex calibration.

Keywords:

Gauss–Newton algorithm Isolation forest Levenberg–Marquardt algorithm UWB anchor self-localization antenna delay localization outlier detection

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Area of Science:

Wireless communication systems
Localization and positioning technologies
Signal processing

Background:

Accurate localization is crucial for many applications, including sports and leisure.
Existing ultrawide-band (UWB) localization systems often require complex calibration procedures.
Estimating positions of both network anchors and user tags presents a significant challenge.

Purpose of the Study:

To develop a user-friendly, fully wireless UWB localization system for consumer applications.
To enable accurate self-localization of access points (anchors) and tags.
To avoid time-consuming calibration while ensuring high localization precision.

Main Methods:

Implemented a two-way ranging technique for anchor self-localization.
Utilized a Gauss-Newton algorithm for antenna delay estimation and compensation.
Employed a modified isolation forest algorithm for outlier identification and removal from low-dimensional measurements.
Applied multilateration of time difference of arrival (TDoA) measurements for tag localization.

Main Results:

The proposed system achieves accurate tag localization without extensive calibration.
The combination of algorithms effectively handles antenna delays and identifies outliers.
Experimental data from a proprietary UWB system validated the performance of the developed algorithms.

Conclusions:

The developed UWB localization system offers a practical solution for consumer-level applications.
The novel algorithmic approach enhances accuracy and usability by simplifying calibration.
This technology has the potential to improve user experience in sports and leisure activities.