Multipath-Enhanced Device-Free Localization using Low-Cost Ultra-Wideband Devices

Multipath propagation can improve device-free localization (DFL). In this work, we therefore provide an overview of the required signal processing for multipath-enhanced device-free localization (MDFL) and introduce a possible sequential Bayesian approach. Furthermore, we demonstrate that low-cost ultra-wideband devices can be used for MDFL. Specifically, we use the Qorvo (DecaWave) DWM1000 module, for which we describe how to access the channel impulse response in detail. Based on a sparse network of ultra-wideband devices, we evaluate the localization performance of both DFL and MDFL for an indoor scenario. Thereby, MDFL is shown to clearly outperform DFL in terms of localization performance.