Research Seminar - August 26, 2004

Blind Source Separation Using Second Order Statistics

THURSDAY 26 August Time: 11am

Computer Science & Software Engineering

Seminar Room 1.24
Speaker:
Dr. Abed-Meraim

Abstract:

Blind source separation (BSS) is a fundamental problem in signal processing that is sometimes known under different names: blind array processing, signal copy, independent component analysis, waveform preserving estimation, etc. In all these instances, the underlying model is that of m statistically `independent' signals whose n (possibly noisy) linear combinations are observed. Neither the structure of the linear combinations nor the source signals are known to the receivers. In this environment, we want to identify the linear combinations (blind identification problem) and de-couple the linear combinations (blind source de-coupling). In this presentation, after a brief overview of the BSS problem, we will focus on the BSS solutions using the second order statistics of the observed signal. Identifiability conditions and separation algorithms will be considered in the cases of stationary, cyclo-stationary and non-stationary sources respectively.

BIO:

Karim ABED-MERAIM was born in 1967. He received the State Engineering Degree from Ecole Polytechnique, Paris, FRANCE, in 1990, the State Engineering Degree from Ecole Nationale Supérieure des Télécommunications (ENST), Paris, FRANCE, in 1992, the M.Sc. degree from Paris XI University, Orsay, FRANCE, in 1992 and the Ph.D. degree from the Ecole Nationale Supérieure des Télécommunications (ENST), Paris, FRANCE, in 1995 (in the field of Signal Processing and communications). From 1995 to 1998, he took a position as a research staff at the Electrical Engeneering Department of the University of Melbourne where he worked on several research project related to "Blind System Identification for Wireless Communications", "Blind Source Separation", and "Array Processing for Communications", respectively. He currently is Associate Professor (since 1998) at the Signal and Image Processing Department of ENST. His research interests are in signal processing for communications and include system identification, multi-user detection, space-time coding, adaptive filtering and tracking, array processing and statistical performance analysis. He has been the technical chairman of ISSPA 2001 (Sixth International Symposium on Signal Processing and its Applications) and ISSPA 2003 held in Kuala Lumpur (Malaysia) and Paris (France), respectively. He has been also a visiting Scholar at the Centre of Wireless Communications (National University of Singapore) in 1999, at the EEE Department of Nanyang Technological University (Singapore) in 2001 and at the Engineering and Mathematics Department of Edith Cowan University (Perth, Australia) in 2004. He is the author of about 200 scientific publications including book chapters, international journal and conference papers and patents. Dr. Abed-Meraim is an IEEE member and an associate editor for the IEEE Transactions on Signal Processing.