Uni-Fi: Integrated Multi-Task Wi-Fi Sensing

Abstract: Wi-Fi sensing technology enables non-intrusive, continuous monitoring of user locations and activities, which supports diverse smart home applications. Since different sensing tasks exhibit contextual relationships, their integration can enhance individual module performance. However, integrating sensing tasks across different research efforts faces challenges due to the absence of two key elements. The first is a unified architecture that captures the fundamental nature shared across diverse sensing tasks. The second is an extensible pipeline that can integrate sensing methodologies proposed in potential future research. This paper presents Uni-Fi, an extensible framework for multi-task Wi-Fi sensing integration. This paper makes the following contributions. First, we propose a unified theoretical framework that reveals the fundamental differences between single-task and multi-task sensing. Second, we develop a scalable sensing pipeline that automatically generates multi-task sensing solvers, enabling seamless integration of multiple sensing models. Experimental results show that Uni-Fi achieves robust performance across tasks, with a localization error of approximately 0.54 meters, 98.34 percent accuracy for activity classification, and 98.57 percent accuracy for presence detection.