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  4. Probabilistic Ultra-Wideband TDoA Localization with Bias Correction
 
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2022
Conference Paper
Title

Probabilistic Ultra-Wideband TDoA Localization with Bias Correction

Abstract
Ultra-wideband (UWB) radio localization is a popular solution for indoor navigation. The time delay of radio signals between agents and anchors enables the inference of the agents' positions. The measurement of the time difference of arrival (TDoA) of these radio signals provides a scalable way to achieve localization. Due to factors like the antenna and room geometry TDoA measurements tend to contain a bias error. We present a probabilistic model-based approach to solve the TDoA localization problem with bias correction. By using stochastic variational Gaussian process (SVGP) regression with a tailored kernel we can exploit the problem structure and efficiently predict the measurement bias. Then we correct this bias by incorporating the Gaussian process (GP) predictions to a factor graph based localization scheme. The method is tested on data recorded from a quadrocopter and validated against an optical marker-based tracking. The framework manages to infer the location of the drone accurately and the proposed bias correction reduces localization errors significantly.
Author(s)
Vollmer, Felix
Fraunhofer-Einrichtung für Individualisierte und Zellbasierte Medizintechnik IMTE  
Graßhoff, Jan  
Fraunhofer-Einrichtung für Individualisierte und Zellbasierte Medizintechnik IMTE  
Rostalski, Philipp  
Fraunhofer-Einrichtung für Individualisierte und Zellbasierte Medizintechnik IMTE  
Mainwork
30th European Signal Processing Conference, EUSIPCO 2022. Proceedings  
Conference
European Signal Processing Conference 2022  
DOI
10.23919/EUSIPCO55093.2022.9909651
Language
English
Fraunhofer-Einrichtung für Individualisierte und Zellbasierte Medizintechnik IMTE  
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