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Wireless-Based Passive Radar for e-Healthcare and Security

Photo of Dr. Kevin Chetty

Dr. Kevin Chetty

Associate Professor, Faculty of Engineering, University College London (UCL)

April 6, 2023 16:00 - 17:30

SITE 5084 (800 King Edward). In-person only (no video streaming or recording), University of Ottawa




Passive wireless radar relies on already-present Illuminators of Opportunity to provide radio transmission signals that interact with targets of interest. Though the technology has been around since World War II for aircraft detection, it has experienced a resurgence of interest over the last decade due to the rapid growth of digital communications technologies which have provided high-bandwidth ambient signals in homes, and across towns and cities that can be opportunistically exploited for finer-grained sensing. Research in this area has also been driven by increased accessibility to commercial off-the-shelf hardware, such as software-defined radio architectures, and low-cost computational power. The receive-only nature of passive radar systems means the systems are typically low-cost and not subject to spectrum license fees, which makes them attractive as a ubiquitous sensing solution in urban landscapes. Moreover, motion sensitivity is significantly more accurate compared to conventional active radars owing to the increased integration times possible, which can aid Doppler tracking techniques and micro-Doppler based human activity recognition. The presentation will outline recent advances at UCL’s Urban Wireless Sensing lab to develop wireless passive radar technologies for e-healthcare/ambient assisted living, and security.


Dr. Kevin Chetty is an Associate Professor in the Faculty of Engineering at University College London (UCL). His research lies in the field of radio-frequency (RF) sensing, and radar signal processing using machine learning. He has pioneered work in passive WiFi sensing; a new area of bistatic radar research that is expected to facilitate step-changes in ubiquitous sensing, e-healthcare and smart environments. His research also focuses on novel RF sensors and signal processing techniques that exploit wireless communications for passively detecting, localising and tracking people, and human activity recognition through the exploitation of radar micro-Doppler signatures. Dr. Chetty is author to over 100 book chapters, journal articles and conference publications, and has served on the Technical and Organising Committees for the IEEE Radar Conference, Globecom, iWEM and International Security & Crime Science conference, and is a member of the IEEE and IET.

Last updated April 4, 2023

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