Project

Integrated Sensing and Communication : Radio signals, traditionally used for data communication, are now emerging as sensing media. Researchers have demonstrated the great potential of RF sensing, including understanding gesture commands and monitoring vital signs. However, sensing and communication are contradictory purposes. For sensing purposes, we use a known sequence to probe unknown channel conditions, while for communication purposes, we decode unknown messages assuming that the channel conditions are known. We address the challenges encountered when integrating sensing and communication functions and thus they can work in harmony. Accordingly, we build up prototypes to test the performance of our design.

Intelligent Sensing : We investigate how to fully exploit RF signals (Wi-Fi, mmWave, Ultra-wideband), acoustic signals, and visible/invisible light signals to achieve intelligent sensing. We are interested in gesture recognition, motion tracking, food intake logging, and vital sign monitoring, so that we can enable convenient human-computer interactions, location-based services, and long-term health management. We are working toward the vision of smart homes and smart healthcare. We have built several sensing prototypes for various purposes.

Security in the era of IoT : Various intelligent devices are connected by wireless links. As wireless signals are broadcast signals, they can be easily eavesdropped by malicious guys. Besides, the miniaturized design paradigm also leave loopholes in the devices. We focus on studying the security issues in IoT devices/IoT networks, and propose corresponding coutermeasures. In addition to the inherent design deficiency, we also investigate the vulnerability in signal processing flows.