We consider a scenario where a source sends information to a remote destination and where a relay terminal is occasionally present in close proximity to the source, but without the source's awareness. We assume slow fading (block fading) independent channels between the source and the occasional relay to destination, while the channel between the source to the relay is assumed to be additive Gaussian, due to their relatively close proximity. The focus is on oblivious cooperative schemes which make efficient use of the relay when it is present, and still maintain single user optimality when the relay is absent. One such scheme is shown to be Block Markov decode-and-forward which involves correlated transmissions of the source and the relay. The optimal correlation for this scheme is found by solving the optimal outage performance of a 2 X 1 multiple-input single-output (MISO) link under individual power constraints and a correlation constraint. Finally, quantization schemes based on various levels of side information are also discussed.
Joint work with Michael Katz, EE Department, Technion, Haifa 32000, Israel.
BiographyShlomo Shamai (Shitz) received the B.Sc., M.Sc., and Ph.D. degrees in electrical engineering from the Technion---Israel Institute of Technology, in 1975, 1981 and 1986 respectively.
During 1975-1985 he was with the Communications Research Labs in the capacity of a Senior Research Engineer. Since 1986 he is with the Department of Electrical Engineering, Technion---Israel Institute of Technology, where he is now the William Fondiller Professor of Telecommunications. His research interests encompasses a wide spectrum of topics in information theo ry and statistical communications.
Dr. Shamai (Shitz) is an IEEE Fellow and a member of the Union Radio Scientifiqu e Internationale (URSI). He is the recipient of the 1999 van der Pol Gold Medal of URSI, and a co-recipient of the 2000 IEEE Donald G. Fink Prize Paper Award, the 2003, and the 2004 joint IT/COM societies paper award, and the 2007 IEEE Information Theory Society Paper Award. He is also the recipient of 1985 Alon Grant for distinguished young scientists and the 2000 Technion Henry T aub Prize for Excellence in Research. He has served as Associate Editor for the Shannon Theory of the IEEE Transactions on Information Theory, and also serves on the Board of Governors of the Information Theory Society.