Tutorials

T4 - Coding for Multiple Antenna Systems

Tolga Duman, Arizona State University, USA
Ali Ghrayeb, Concordia University, Canada

Achieving reliable high-speed data transmission over wireless links is a challenging task due to multipath fading and interference from other users. The single most effective technique to combat such adverse effects is to introduce diversity into the system. There are many different diversity techniques including temporal, frequency, and spatial diversity. Furthermore, different diversity techniques may be combined to enhance the performance of the wireless system. Space-time coding, a new coding paradigm suitable for multiple antenna systems, is a successful example that combines temporal diversity (through channel coding) and spatial diversity (through multiple transmit and receive antennas). This tutorial gives a complete overview of the various emerging space-time coding techniques. These include space-time trellis codes, space-time block codes, turbo codes, and concatenated codes with iterative decoding, among others. The tutorial focuses on the construction and performance analysis of such coding schemes over various wireless channels. In addition, it addresses information theoretical limits for multi antenna systems over wireless channels. Participants will also see comparisons between these coding schemes in terms of performance and complexity. In addition, several practical space-time coding architectures such as BLAST and its variants will be described. Other practical issues such as antenna selection at the transmitter and/or receiver and the effects of sub-channel correlation on the system performance will also be considered.


Tolga M. Duman received the B.S. degree from Bilkent University in 1993, M.S. and Ph.D. degrees from Northeastern University, Boston, in 1995 and 1998, respectively, all in electrical engineering. He joined the Electrical Engineering faculty of Arizona State University as an assistant professor in August 1998. Dr. Duman's current research interests are in digital communications, wireless and mobile communications, channel coding, turbo codes, coding for recording channels, and coding for wireless communications. Dr. Duman published about 20 journal papers and 40 refereed conference papers in these areas. He is a recipient of the National Science Foundation CAREER Award, IEEE Third Millennium medal, and IEEE Benelux Joint Chapter best paper award (1999). He is a member of the IEEE Information Theory and Communication Societies.

Ali Ghrayeb received the Ph.D. degree in electrical engineering from the University of Arizona, Tucson, AZ, in May 2000. From 2000 to 2002, he was an Assistant Professor in the Electrical Engineering Department at the American University of Sharjah, UAE. Since August 2002, he has been with the Department of Electrical and Computer Engineering, Concordia University, Montreal, Canada, where he is an Assistant Professor. His research interests include digital and wireless communications, channel coding, turbo codes, space-time codes, linear and nonlinear equalization, and coding for data transmission and storage. He has published over 25 refereed technical papers in the above research areas. He has recently established a three-year collaborative research project funded by the NSF with Tolga Duman of Arizona State University. He is on the Technical Program Committee of several IEEE conferences, including VTC 2003/2004 and ICC 2004.


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