UltraLEGO: A Modular Ultra-Wideband Phased Array Platform for Wireless Sensing and Localization.

Abstract

Diversified wireless sensing and localization tasks impose distinct requirements on the underlying perception platform. However, existing wireless platforms are typically fabricated with a fixed array configuration, requiring substantial hardware redesign to adapt to different applications. In this paper, we present UltraLEGO, a modular ultra-wideband phasedarray architecture that enables flexible array reconfiguration without circuit redesign while simultaneously supporting heterogeneous sensing and localization paradigms. To address phase incoherence among modularized array elements, we leverage multipath correlations in wireless channel estimation and incorporate the mechanism into a unified sensing and localization framework. Extensive experiments demonstrate that UltraLEGO adapts efficiently to diverse tasks while achieving state-of-the-art perception accuracy.