T1 - Orthogonal Frequency Division Multiplexing for Wireless Communications
| • | Leonard J. Cimini Jr, University of Delaware, USA |
| • | Gordon L. St¸ber, Georgia Institute of Technology, USA |
| • | Ye Li, Georgia Institute of Technology, USA |
| Orthogonal frequency division multiplexing (OFDM) has been shown to be an effective technique to combat multipath fading in wireless communications. This approach has been chosen as the standards in several outdoor and indoor high-speed wireless data applications. The capacity of wireless communication systems can be further improved if the recent emerging MIMO techniques are used in OFDM systems. This tutorial initially presents the basic principles of OFDM, and discuss the problems and some of the potential solutions to the practical issues in implementing such a system, including techniques for peak-to-average power ratio reduction, time and frequency synchronization, channel estimation, adaptive antenna arrays and transmitter diversity. Then we briefly introduce MIMO techniques and present the application of these techniques to OFDM wireless communication systems. We conclude with a discussion of current and proposed systems. |
Leonard J. Cimini, Jr. (Sí77-Mí82-SMí89-Fí00) received a Ph.D. in Electrical Engineering from the University of Pennsylvania in 1982, and, worked at AT&T, first in Bell Labs and then AT&T Labs, for twenty years. His research has concentrated on lightwave and wireless communications. His main emphasis has been on devising techniques for overcoming the bit-rate limitations imposed by the radio environment. In this context, he pioneered the application of Orthogonal Frequency Division Multi-§Corresponding Presenter plexing to the emerging field of wireless communications. Dr. Cimini has been very active within the IEEE, and he was the founding Editor-in-Chief of the IEEE J-SAC: Wireless Communications Series. He was also an Adjunct Professor in the Electrical Engineering Department of the University of Pennsylvania where he taught a graduate-level course in wireless systems. He was elected a Fellow of the IEEE in 2000 for contributions to the theory and practice of high-speed wireless communications. Dr. Cimini is currently a Professor at the University of Delaware.
Gordon L. St¸ber (Sí81-Mí82-SMí96-Fí99) received the B.A.Sc. and Ph.D. degrees in Electrical Engineering from the University of Waterloo, Ontario, Canada, in 1982 and 1986, respectively. Since 1986, he has been with the School of Electrical and Computer Engineering, Georgia Institute of Technology, where he is currently the Joseph M. Pettit Professor in Communications. His research interests are in wireless communications and communication signal processing. He was co-recipient of the Jack Neubauer Memorial Award for the best paper of the year published by the IEEE Vehicular Technology Society on the subject of Vehicular Technology Systems. He is author of the textbook Principles of Mobile Communication, Kluwer Academic Publishers, 1996, 2/e 2001. He served as chair for many internation conferences. He is a past Editor for Spread Spectrum with the IEEE Transactions on Communications (1993-1998) and has served as a member of the IEEE Communication Society Awards Committee (2000-2002). He is currently a member of the IEEE Vehicular Technology Society Board of Governors.
Ye (Geoffrey) Li (Sí93-Mí95-SMí97) was born in Jiangsu, China. He received his B.S.E. and M.S.E. degrees in 1983 and 1986, respectively, from the Department of Wireless Engineering, Nanjing Insti-tute of Technology, Nanjing, China, and his Ph.D. degree in 1994 from the Department of Electrical Engineering, Auburn University, Alabama. After spending several years at AT&T Labs - Research, he joined Georgia Tech as an Associate Professor in 2000. His general research interests include statistical signal processing and wireless communications. He served as a guest editor for two special issues on Signal Processing for Wireless Communications for the IEEE J-SAC and is currently serving as an editor for Wireless Communication Theory for the IEEE Transactions on Communications.
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