| Speaker: | Raymond Pickholtz, George Washington University |
|---|---|
| Abstract: | Wireless networking is so promising, yet so elusive due to the limitations on radio spectrum. In this general talk we address several concepts effecting the limits of wireless communications and a variety of means for improving the performance and spectral efficiency. The ultimate limit is argued to be interference and the conventional paradigm is to suffer its consequences. We now have an arsenal of techniques for reducing or eliminating interference such as multi user detection (MUD), interference cancellation, spatial processing with "smart antennas", and increasing capacity with space-time coding. We show the benefits and costs. Third generation terrestrial wireless system standards are now being finalized and dramatically new satellite communications systems are being planned in which these techniques will be a great benefit. We conclude the talk by describing some innovative work being done at GWU and elsewhere. In particular, we will describe several new approaches in realizing, multi-user detection and/or Space Time Coding combined with Iterative (Turbo) Methods, and Coding-Spreading tradeoffs in CDMA. |
| Biography: | Raymond L. Pickholtz is a Professor in, and former chairman of, the Department of Electrical Engineering and Computer Science at The George Washington University, Washington, D.C. His research interests include multiple access for mobile and personal communications, including CDMA; congestion control in high-speed networks; secure communications; and image processing. He received his Ph.D. from the Polytechnic Institute of Brooklyn where he began his academic career after working at RCA and ITT Labs. He has published scores of papers in major scientific journals (some prize winning), holds a number of US patents in Communications, is editor for a book series and on the editorial Board and served as editor of several journals. He is a Fellow of the IEEE, the Washington Academy of Sciences, and of the AAAS. He received an IEEE Centennial Award He was President of the IEEE Communications Society during 1989-90. He received the Donald W. McLellan Award in 1994. During 1997 he was Visiting Erskine Fellow at the University of Canterbury, Christchurch, New Zealand. He received the IEEE Millenium Medal in June 2000. |
| Presented On: | October 27, 2000 |
| Videotape: | <Not available.> |
