UWB-Based Vulnerable Road Users Protection System at Intersections: Concept, Measurements and First Results

Abstract

Multipath-enhanced device-free localization (MDFL) leverages user-induced fading in the received power of both line-of-sight (LoS) and multipath components (MPCs) to localize unequipped vulnerable road users (VRUs). In this paper, we report real-world measurement campaign at a busy intersection to evaluate the feasibility of MDFL for sensing VRUs in complex outdoor environments. We describe the measurement setup, the processing pipeline, and characterize pedestrian-induced power changes on LoS and MPCs across links, showing repeatable, geometry consistent power changes along the pedestrian trajectory. The results confirm that a sensing repetition rate of 8 Hz is sufficient in order to detect a pedestrian at walking speed. Overall, the measurements demonstrate the feasibility of using MDFL at road intersections for VRU sensing and localization.