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Accurate narrowband LPWA ranging: Principles, performance in AWGN and multipath channels

Abstract : Today approaches of radio localization for Low Power Wide Area networks do not provide sufficiently accurate ranging required by applications such as wearable health monitoring. Coherent multi-channel ranging or Phase-of-Flight (PoF) ranging provides significantly improved temporal resolution through the aggregation of sequentially transmitted narrowband signals for the same level coverage performance as legacy Time-of-Flight (ToF) ranging. This paper compares the performance of PoF and ToF under additive white Gaussian channels with both simulations and laboratory measurements. Field trials have been performed in a multipath outdoor environment and strong ranging biases are observed. Ranging bias estimators are introduced and evaluated to mitigate these damaging effects: thanks to the new approach, accuracy of 30 m in 90% of the cases may be obtained. This compares to 250 m when legacy ToF is considered.
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https://hal-cea.archives-ouvertes.fr/cea-03199084
Contributor : Vincent Berg <>
Submitted on : Thursday, April 15, 2021 - 12:37:43 PM
Last modification on : Saturday, April 17, 2021 - 3:18:07 AM
Long-term archiving on: : Friday, July 16, 2021 - 6:37:13 PM

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Florian Wolf, Sébastien de Rivaz, François Dehmas, Valérian Mannoni, Vincent Berg, et al.. Accurate narrowband LPWA ranging: Principles, performance in AWGN and multipath channels. EuCNC 2020 - 29th European Conference on Networks and Communications, Jun 2020, Durbovnick, Croatia. pp.148-153, ⟨10.1109/EuCNC48522.2020.9200944⟩. ⟨cea-03199084⟩

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