Concurrent Bi-directional TDoA Positioning in UWB Network with Free-running Clocks

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F22%3A00356994" target="_blank" >RIV/68407700:21230/22:00356994 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1109/TAES.2022.3161895" target="_blank" >https://doi.org/10.1109/TAES.2022.3161895</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/TAES.2022.3161895" target="_blank" >10.1109/TAES.2022.3161895</a>

Result language
angličtina
Original language name
Concurrent Bi-directional TDoA Positioning in UWB Network with Free-running Clocks
Original language description
This paper proposes an approach of TDoA positioning in UWB networks, where user tags localize themselves by means of exploitation of the broadcasted synchronization messages of the anchor network. Such approach promises unlimited number of localized devices, moreover, the position is available directly at the user terminal. The key challenge of this method is to eliminate errors caused by tag clock drifts, which render the TDoA measurements useless when left uncorrected. Our method employs extended Kalman filtering (EKF) for the estimation of position and elimination of the drift-induced errors. It is shown that the system performance is similar to the more common TDoA method, where the tags transmit blinks received by the anchors. However, the anchors are still able to receive the blink messages and estimate position of those tags, since the synchronization messages are exploited. Therefore, it is possible to use both directions of the TDoA positioning concurrently; a limited number of tags is tracked by the infrastructure and all tags may compute their positions. The TDoA solutions have achieved RMS horizontal accuracy of 25.9 cm and 33.6 cm, respectively.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20201 - Electrical and electronic engineering

Project
<a href="/en/project/TH03010261" target="_blank" >TH03010261: Absolute and relative positioning within 4th industrial revolution environment</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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