Wireless Beyond Wi-Fi

Matt Reynolds
University of Washington

Abstract: Wireless communication has already enabled the phenomenal growth of mobile computing. But today’s mobile devices are highly constrained by energy and bandwidth limitations- a typical smart phone is now 50% battery by volume, and 40% radio by board area. In this talk I will show some examples of how advances at the physical layer can change the way we think about mobile computing through innovations in energy delivery, communication, sensing, and imaging.

One example is a tiny wireless backpack that enables neural and EMG telemetry from dragonflies in flight, with a 5 Mbps uplink, 1.2mW total power, and a weight of only 38 mg. The backpack is wirelessly powered and employs a modulated backscatter communication link that achieves an energy cost of only a few pJ/bit, over 100X lower energy per bit than Wi-Fi. I will then present results that extend MIMO techniques from communication to wireless power transmission, to enhance long range wireless power delivery to mobile devices, and some results, recently reported in Science, on lens-less compressive imaging with millimeter waves.

Speaker Bio:
Matt Reynolds is an Associate Professor in the Departments of Electrical Engineering and Computer Science and Engineering (joint appointment) at the University of Washington. He was previously the Nortel Networks Assistant Professor in the Department of Electrical and Computer Engineering at Duke University. He is also co-founder of the RFID systems firm ThingMagic Inc (acquired by Trimble Navigation), the energy conservation firm Zensi (acquired by Belkin), and the home sensing company SNUPI Inc (acquired by Sears).

Matt's research interests include microwave and millimeter wave imaging, energy efficiency at the physical layer of wireless communication, and the physics of sensing and actuation. Matt received the Ph.D. from the MIT Media Lab in 2003, where he was a Motorola Fellow, as well as S.B. and M.Eng. degrees in Electrical Engineering and Computer Science from MIT. He is a Senior Member of the IEEE, has received five Best Paper awards at IEEE and ACM conferences, and has 36 issued and over 58 pending US patents. He is a UW CoMotion Presidential Innovation Faculty Fellow.

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