The Poisson Communication Channel
|Speaker||Dr. Prakash Narayan|
|Organization ||University of Maryland|
|Date||April 25, 2014 12:50 PM|
The Poisson channel model is an apt representation of a direct-detection dark-current-limited optical communication link. The input to the channel controls the instantaneous rate of a Poisson point process at the photodetector output. Additionally, in a free-space optical communication link, atmospheric turbulence causes random variations in the refractive index of air at optical wavelengths, resulting in optical ``fading" that can be combatted by adaptive power control and MIMO techniques as in RF communication. This talk will survey the information theory of the Poisson channel, and implications for optical communication.
Dr. Prakash Narayan received the B.Tech. degree in Electrical Engineering from the Indian Institute of Technology, Madras, and the M.S. and D.Sc. degrees in Systems Science and Mathematics, and Electrical Engineering, respectively, from Washington University, St. Louis, MO. He is Professor of Electrical and Computer Engineering at the University of Maryland, College Park, with a joint appointment at the Institute for Systems Research. He has held visiting appointments at ETH, Zurich, the Technion, Haifa, the Renyi Institute of the Hungarian Academy of Sciences, Budapest, Universitat Bielefeld, LADSEB, Padova, and the Indian Institute of Science, Bangalore. Narayan's research and teaching interests are in multiuser information and communication theory, cryptography, broadband communication networks, and information theory and statistics. He has served as Associate Editor for Shannon Theory for the IEEE Transactions on Information Theory and is currently on its Executive Editorial Board. He was a member of the Board of Governors of the IEEE Information Theory Society, and is a Fellow of the IEEE.