Abstract: The talk is focused on the efficiency and gleaning of information in cyber physical systems (CPSs). For evaluating the interdependence of communications and controls in CPSs, we study the control of entropy (or equivalently uncertainty) via communications in CPSs. We consider the controller as the Maxwell's demon that decimates the system entropy. Due to the second law of thermodynamics, the system entropy cannot be spontaneously decreased. Therefore, to reduce the system entropy, the controller needs external information communicated from sensors. The information efficiency of reducing entropy is studied for both finite and continuous state systems. Then, we will discuss how to leverage the millimeter wave communications in 5G systems for the purpose of sensing, as a `bonus' of wireless communications. Detection, tracking and imaging for objects in the millimeter wave band will be discussed, based on the millimeter wave signals blocked or reflected by the objects of interest. Both experimental and numerical results on this `bonus' sensing mechanism will be introduced.
Bio: Husheng Li received the BS and MS degrees in electronic engineering from Tsinghua University, Beijing, China, in 1998 and 2000, respectively, and the Ph.D. degree in electrical engineering from Princeton University, Princeton, NJ, in 2005. From 2005 to 2007, he worked as a senior engineer at Qualcomm Inc., San Diego, CA. In 2007, he joined the EECS department of the University of Tennessee, Knoxville, TN, as an assistant professor. He is promoted to associate professor in 2013. His research is mainly focused on statistical signal processing, wireless communications, networking, smart grid and game theory. Dr. Li is the recipient of the Best Paper Awards of EURASIP Journal of Wireless Communications and Networks, 2005, EURASIP Journal of Advances in Signal Processing, 2015, IEEE Globecome 2017, IEEE ICC 2011 and IEEE SmartGridComm 2012, and the Best Demo Award of IEEE Globecom, 2010.
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