ABSTRACT: In this talk I will review some recent developments in the design and study of  distributed space-time codes for asynchronous cooperative networks using decode and forward or amplify and forward strategies. In these networks,  timing synchronization among the relays is not assured ( e.g., in cases of broadcast to dispersed recipients or in networks without a shared, high-quality timing reference) and traditional space-time codes fail to achieve diversity when used in a distributed fashion.The author will discuss different methodologies to design delay-tolerant distributed codes that can achieve the full spatial diversity regardless of timing offsets among the different relays. The author will conclude the talk by discussing the diversity-multiplexing tradeoff  of asynchronous cooperative networks.

 

SPEAKER: M. Oussama Damen received his Ph.D. (in Electronics and Communications) from the École Nationale Supérieure des Télécommunications (ENST) de Paris, France, in October 1999. He has done post-doctoral research at the ENST,  Paris, France, from November 1999 to August 2000, and at the Electrical and Computer Engineering department of the University of Minnesota from September 2000 to March 2001. From March 2001 to June 2004, he was with the Electrical and Computer Engineering department of the University of Alberta, working as a Senior Research Associate of Alberta Informatics Circle of Research Excellence (ICORE).In June 2004, he joined the Electrical and Computer Engineering  department of the University of Waterloo, Ontario, where he is nowworking as an Associate Professor and holds the NSERC/Nortel Networks  Associate Chair in Advanced Telecommunications. In 2007, he won the Early Researcher Award from the government of Ontario and the  Excellence research award from the University of Waterloo. He also held a visiting position at Ohio-State University in the summer of 2002. He is a senior member of IEEE and has co-authored more than 80 technical papers in international journals and conferences and three US patents.His current research interests are in the general areas of wireless communications and coding theory with a special emphasis on coding for multiple-input multiple-output (MIMO) channels and cooperative diversity.