Decawave UWB Clock Drift Correction and Power Self-Calibration.

Sensors (Basel)

Institute of Astronomical and Physical Geodesy, Technical University of Munich, 80333 Munich, Germany.

Published: July 2019

The position accuracy based on Decawave Ultra-Wideband (UWB) is affected mainly by three factors: hardware delays, clock drift, and signal power. This article discusses the last two factors. The general approach to clock drift correction uses the phase-locked loop (PLL) integrator, which we show is subject to signal power variations, and therefore, is less suitable for clock drift correction. The general approach to the estimation of signal power correction curves requires additional measurement equipment. This article presents a new method for obtaining the curve without additional hardware and clock drift correction without the PLL integrator. Both correction methods were fused together to improve two-way ranging (TWR).

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6651025PMC
http://dx.doi.org/10.3390/s19132942DOI Listing

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