February 21, 2017, Subhrakanti Dey, Uppsala University, Sweden

Tuesday, February 21, 2016, 2pm-3pm
8 St. Mary’s Street, PHO 404/428
Refreshments at 1:45pm

Subhrakanti Dey
Uppsala University – Sweden
CISE Resident Scholar 

Event-triggered Remote Estimation With Packet Loss in the Presence of an             Eavesdropper

In this talk we will consider remote state estimation in the presence of an eavesdropper. A sensor transmits local state estimates over a packet dropping link to a remote estimator, while an eavesdropper can successfully overhear each sensor transmission with a certain probability. The objective is to determine when the sensor should transmit, in order to minimize the estimation error covariance at the remote estimator, while trying to keep the eavesdropper error covariance above a certain level. This is done by solving an optimization problem that minimizes a linear combination of the expected estimation error covariance and the negative of the expected eavesdropper error covariance. Structural results on the optimal transmission policy are derived, and shown to exhibit thresholding behaviour in the estimation error covariances. Furthermore, for unstable systems, it is shown that in the infinite horizon situation there exist transmission policies which can keep the expected estimation error covariance bounded while the expected eavesdropper error covariance is unbounded. numerical simulations, and experimental results that illustrate our distributed approach.

Subhrakanti Dey was born in India, in 1968. He received the Bachelor in Technology and Master in Technology degrees from the Department of Electronics and Electrical Communication Engineering, Indian Institute of Technology, Kharagpur, in 1991 and 1993, respectively, and the Ph.D. degree from the Department of Systems Engineering, Research School of Information Sciences and Engineering, Australian National University, Canberra, in 1996.

He is currently a Professor with the Dept. of Engineering Sciences in Uppsala University, Sweden. Prior to this, he was a Professor with the Department of Electrical and Electronic Engineering, University of Melbourne, Parkville, Australia, from 2000 until early 2013. From September 1995 to September 1997, and September 1998 to February 2000, he was a Postdoctoral Research Fellow with the Department of Systems Engineering, Australian National University. From September 1997 to September 1998, he was a Postdoctoral Research Associate with the Institute for Systems Research, University of Maryland, College Park.

His current research interests include wireless communications and networks, signal processing for sensor networks, networked control systems, and molecular communication systems.

Professor Dey currently serves on the Editorial Board of IEEE Transactions on Signal Processing and IEEE Transactions on Control of Network Systems. He was also an Associate Editor for the  IEEE Transactions on Signal Processing during 2007-2010 and the  IEEE Transactions on Automatic Control during 2004-2007, and Associate Editor for  Elsevier Systems and Control Letters during 2003-2013.

Faculty Host: Yannis Paschalidis 

Student Host: