********************************************************************
Seminar
Department of Systems Engineering and Engineering Management
The Chinese University of Hong Kong
------------------------------------------------------------------------------------------
| Title | : | Distributed Signal Processing in a Bandwidth Constrained Sensor Network |
| Speaker | : | Professor Zhi-Quan (Tom) Luo |
| University of Minnesota | ||
| Date | : | January 26th, 2007 (Friday) |
| Time | : | 4:30 p.m. - 5:30 p.m. |
| Venue | : | Room 513, MMW Engineering Building |
| (Engineering Building Complex Phase 2) | ||
| CUHK | ||
------------------------------------------------------------------------------------------
Abstract:
| Consider a situation where a set of distributed sensors and a fusion center wish to cooperate to estimate an unknown parameter over a bounded interval. Each sensor collects one noise-corrupted sample, performs a local estimation, and transmits a message to the fusion center, while the latter combines the received messages to produce a final estimate. In this talk we will discuss optimal local estimation and final fusion schemes under the constraint that the communication from each sensor to the fusion center must be an one-bit binary message. Such binary message constraint is well motivated by the bandwidth limitation of the communication links, and by the limited power budget of local sensors. The proposed decentralized estimation scheme is universal (i.e., works for all noise pdf), satisfies the binary message constraint, and requires only a factor of 4 increase in the number of sensors to achieve the same mean squared error when the binary message constraint is absent. Furthermore, this scheme suggests allocating 1/2 of the sensors to estimate the first bit of the unknown parameter, 1/4 of the sensors to estimate to second bit, and so on. Extensions to the ad hoc sensor network case (with no fusion center) and to the noisy channel case will also be discussed. |
-------------------------------------------------------------------------------------------
Biography:
| Zhi-Quan (Tom) Luo received his B.Sc. degree in Applied Mathematics in 1984 from Peking University, Beijing, China, and his Ph.D degree in 1989 from Massachusetts Institute of Technology. From 1989 to 2003, he was with the Department of Electrical and Computer Engineering, McMaster University, Hamilton, Canada, where he eventually became a full professor and the department head, and held a Canada Research Chair in Information Processing. In 2003, he joined the Department of Electrical and Computer Engineering of the University of Minnesota as the ADC Chair in Digital Technology. He is generally interested in computation/communication complexity issues arising from data communication, wireless and optical networks and systems, and signal processing. His current research interest lies in distributed signal processing, the theory of multi-user communications and the application of optimization techniques to the design of multi-antenna communication systems. He has either served or currently serves on the editorial boards for a number of international journals including SIAM Journal on Optimization, IEEE Transactions on Signal Processing. He is a fellow of IEEE and a recipient of the 2005 IEEE Signal Processing Society Best Paper Award. |
************************* ALL ARE WELCOME ************************
| Enquiries | : | Bolin Ding or Jeffrey Xu Yu |
| : | Department of Systems Engineering and Engineering Management | |
| CUHK | ||
| Website | : | http://www.se.cuhk.edu.hk/~seg5810 |
| : | seg5810@se.cuhk.edu.hk | |
********************************************************************