Interference in Wireless Networks: Information Theory, Communications, and Signal Processing Aspects

Speaker:Prof.Xiaodong Wang (Columbia University)

Time and Date: 10:30- , Dec. 26, 2014

Place: Room B415, Computing Center Building, Handan Campus

Abstract

In this talk, I will provide a general overview of my group’s recent work at Columbia that is related to interference in wireless networks. In the first part of the talk, some capacity and generalized DoF results on interference channels with feedback and receiver cooperation are presented, with special focus on the case when the feedback or cooperation links have limited capacities. In the second part of the talk, energy harvesting communication in fading channels is considered under the constraints of finite battery capacity and maximum transmission power. Optimal schemes for single-user transmit energy scheduling, and for multiuser joint transmit energy and bandwidth scheduling are presented, for both non-causal and causal knowledge of energy harvesting and the channel. In the third part of the talk, we consider cooperative spectrum sensing in a dense secondary network with stringent bandwidth and/or energy constraints on the cooperation channel. A new framework based on sequential detection and event-triggered sampling is described with the salient features of 1-bit communication and asymptotic optimality.

Biography

Xiaodong Wang received the Ph.D degree in Electrical Engineering from Princeton University. He is a Professor of Electrical Engineering at Columbia University in New York. Dr. Wang’s research interests fall in the general areas of signal processing and communications, and has published extensively in these areas. Among his publications is a book entitled “Wireless Communication Systems: Advanced Techniques for Signal Reception”, published by Prentice Hall in 2003. His current research interests include wireless communications, statistical signal processing, and genomic signal processing. Dr. Wang received the 1999 NSF CAREER Award, the 2001 IEEE Communications Society and Information Theory Society Joint Paper Award, and the 2011 IEEE Communication Society Award for Outstanding Paper on New Communication Topics. He has served as an Associate Editor for the IEEE Transactions on Communications, the IEEE Transactions on Wireless Communications, the IEEE Transactions on Signal Processing, and the IEEE Transactions on Information Theory. He is a Fellow of the IEEE and listed as an ISI Highly-cited Author.