Professor Costas N. Georghiades Texas A&M University

1. Erik Jonsson School of Engineering and Computer Science and the Dallas Chapter of IEEE Signal Processing Society Distinguished Lecturer Series 2007 Professor Costas N. Georghiades Texas A&M University P r e s e n t On the Estimator-Correlator and the Search for the Optimum Transmit Point Abstract: Mapping a received noisy signal into the information symbols that produced it with minimum average probability of error is a fundamental problem in digital communications. The search for the optimum point is complex due to the discrete and multidimensional nature of the search space for many current practical systems and it is made even more difficult by the need for the search to be done in real-time. The real-time computation constraint means that the search must be done efficiently if practical rates are to be achieved, but also near optimally for reasonable performance. We look at the problem of optimum detection in the context of the estimator-correlator (EC) structure and some of its implications. In particular, we show how the EC can motivate near optimal and efficient decoding for the multi-input multi-output (MIMO) non-coherent channel and survey briefly some of the existing general search techniques. Costas N. Georghiades received the B.E. degree with distinction from the American University of Beirut and the M.S. and D.Sc. degrees from Washington University in 1983 and 1985, respectively. Since 1985 he has been with the Electrical & Computer Engineering Department at Texas A&M University, where he is currently Department Head and holder of the Delbert A. Whitaker Endowed Chair. His general interests are in the application of information, communication and estimation theories to the study of communication systems. He is an IEEE Fellow and has served in editorial positions with various IEEE journals, including the Transactions on Communications, the Transactions on Information Theory, the JSAC and Communications Letters. Recent conference service includes his being General co-Chair of the 2004 Information Theory Workshop and Technical Program co-Chair for the 2005 Communication Theory Workshop. He was until recently chair of the Communication Theory Technical Committee and chair of the Fellows Evaluation Committee of the Information Theory Society. He currently serves as Editor-in-Chief of IEEE Communications Letters. Date: Friday, Mar. 30, 2007 Time: 11:00 a.m. Place: Engineering and Computer Science Complex UTD Campus TI Auditorium 2.102 Erik Jonsson School of Engineering and Computer Science The University of Texas at Dallas 2601 N. Floyd Road Richardson, TX 75083 For more information: Phone: 972-883-2974 www.utdallas.edu