Towards sub-meter level UWB indoor localization using body wearable sensors
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2020-09-29
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Institute of Electrical and Electronics Engineers Inc.
Resumen
Thanks to its ability to provide sub-meter level positioning accuracy, Ultrawideband (UWB) has found wide use in several wireless body area network (WBAN) applications such as ambient assisted living, remote patient management and preventive care, among others. In spite of the attractiveness of UWB, it is not possible to achieve this level of accuracy when the human body obstructs the wireless channel, leading to a bias in the Time of Flight (TOF) measurements, and hence a detection of position errors of several meters. In this paper, a study of how a sub-meter level of accuracy can be achieved after compensating for body shadowing is presented. Using a Particle Filter (PF), we apply UWB ranging error models that take into consideration the body shadowing effect and evaluate them through simulations and extensive measurements. The results show a significant reduction in the median position error of up to 75 % and 82 % for simulations and experiments, respectively, leading to the achievement of a sub-meter level of localization accuracy.
Palabras clave
Body wearable sensors
Human body shadowing
Localization
Ranging
Ultrawideband
Time of flight
Particle filter
Human body shadowing
Localization
Ranging
Ultrawideband
Time of flight
Particle filter
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Materias
Cita
Otim, T., Bahillo, A., Díez, L. E., Lopez-Iturri, P., & Falcone, F. (2020). Towards sub-meter level UWB indoor localization using body wearable sensors. IEEE Access, 8, 178886-178899. https://doi.org/10.1109/ACCESS.2020.3027669