A New Coded Cooperation Scheme for Wireless Communications and its Performance Analysis

We propose a new coded cooperation scheme for wireless communications to obtain transmit diversity in the scenarios that agents such as mobile handsets, sensor network nodes and etc., due to size, power or other constraints, cannot utilize multiple antennas. New scheme supports more than two cooperative users with a relatively low cooperation level. We evaluate the performance of the proposed scheme in a frequency nonselective slow fading channel. For two cooperative users, we provide the exact analytical analysis. However, for more than two users, as the analytical analysis is very complicated, our performance evaluation is based on computer simulations. Our numerical results show that each of the N cooperative users obtains a full diversity order of N at moderate to high signal to noise ratio regimes. In addition, the results indicate that the new coded cooperation scheme can achieve a noticeable gain over the non-cooperative scheme. Further, the simulation results confirm the analytical derivations derived for two cooperative users.

Masoumeh Nasiri-KenariEmail:

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Azizollah Jamshidi   (IEEE’s 2006) received the B.S. degree (with honors) in Electrical Engineering from Shiraz University, Shiraz, Iran, in 1997, and the M.S. degree in Electrical Engineering from Sharif University of Technology, Tehran, Iran in 1999. He is currently working toward the Ph.D. degree in Electrical Engineering in Sharif University of Technology, Tehran, Iran. Since February 2003, he has been a member of Wireless Research Laboratory of the Electrical Engineering Department in Sharif University. His research interests include multi-user detection in CDMA systems, cooperative diversity, cognitive radio, channel coding and information theory. Masoumeh Nasiri-Kenari   received the B.S and M.S. degrees in Electrical Engineering from Isfahan University of Technology, Isfahan, Iran, in 1986 and 1987, respectively, and the Ph.D. degree in Electrical Engineering from the University of Utah, Salt Lake City, in 1993. From 1987 to 1988, she was a Technical Instructor and Research Assistant at Isfahan University of Technology. Since 1994, she has been with the Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran, where she is now a Professor. Professor Nasiri-Kenari is also the Director of Wireless Research Laboratory of the Electrical Engineering Department. From 1999 to 2001, She was a Co-Director of the Advanced Communication Science Research Laboratory, Iran Telecommunication Research Center, Tehran, Iran. Her current research interests are in wireless communication systems, error correcting codes, and optical communication systems.