ISCAS 2002

IEEE International Symposium

on Circuits and Systems

Sunday, 26 May 2002 - Wednesday, 29 May 2002

Scottsdale Princess Resort

Scottsdale, Arizona

ISCAS 2002 Theme: Circuits and Systems for Ubiquitous Computing







 






Blind Source Separation: Tools and Applications
Christian Jutten
Sunday May 26, 2002, 1:30 PM - 4:45 PM

Abstract:

This tutorial aims at gathering most of the state of the art in blind techniques, including the general purpose tool called Independent Component Analysis (ICA), or more generally, Blind Source Separation (BSS) from linear or non linear static or convolutive mixtures. Theoretical concepts are constantly illustrated by Matlab demos.

Observation models are first surveyed, and inherent indeterminacies are pointed out. Then, optimization criteria are reviewed. Some criteria, called contrasts, hold valid in the presence of noise of unknown statistics. The particular case of semi-blind techniques, which exploit more information about the inputs, is tackled. In a second part important results on linear mixtures are presented, included recent advances concerning methods exploiting nonstationarity or colorness of sources. In a third part, non linear mixtures are introduced in a general framework; the particular case of Post Non Linear (PNL) mixtures is analyzed in depth. The connection between PNL system equalization and blind inversion of Wiener systems is eventually established. In a fourth part, some specific algorithms are presented, including joint diagonalization, pair sweeping, equivariant adaptive, deflation... Lastly, the numerous potential applications of ICA are quoted.

Contents

  • Introduction.
  • Model, separability, and indeterminacies
  • Independence criteria and contrast functions
  • Semi-blind hypotheses
  • Source separation in linear mixtures
  • Model and assumptions, static and convolutive cases
  • Parameterizations, system of equations
  • Sweeping of pairs, Matlab demos
  • Whiten or not whiten
  • Semi-blind: iid, colored or non stationary sources
  • Source separation in nonlinear mixtures
  • Constrained nonlinear mixtures
  • Example of Post-NonLinear (PNL) mixtures: model and equations
  • Matlab demos
  • Example of multiplicative mixtures
  • Other separable nonlinear mixtures
  • From PNL to Wiener systems, matlab demo
  • Spotlights on algorithms
  • Joint diagonalization (JADE, SOBI, PAJOD)
  • Equivariant algorithms (EASY, etc.)
  • Deflation (Fast-ICA)
  • Algorithms based on mutual information
  • Applications


About the Presenter:

Christian Jutten received the PhD degree in 1981 and the Docteur ès Sciences degree in 1987 from the Institut National Polytechnique of Grenoble, France. He taught as associated professor in Ecole Nationale Supérieure d'Electronique et de Radio-Électricité of Grenoble from 1982 to 1989. He was visiting professor in Ecole Polytechnique Fédérale de Lausanne in 1989, before to be full professor in Université Joseph Fourier of Grenoble. For 15 years, his research interests are learning in neural networks, source separation and Independent Component Analysis. Since 1988, he is author or co-author of more than 25 papers in the international journals (Signal Processing, IEEE Trans. on Signal Processing, etc.) and 70 papers in international conferences. He has been associate editor for IEEE Trans on Circuits and Systems (93-95). With J.Hérault and P.Comon, he received in 1991 the award of the best paper in the journal Signal Processing for his paper on source separation. In 92-95, he has been the coordinator of the ESPRIT IV project ELENA. In 1999, he co-organized the first international workshop on signal separation and independent component analysis (ICA'99) in Aussois (France, January 1999).

 
The 2002 IEEE International Symposium on Circuits and Systems is sponsored by:
 
    
and supported by:
Texas Instruments
 
IMPORTANT ANNOUNCEMENTS
Date     Announcement
    6 March     Preliminary conference schedule available. See "Program" area of website.
    29 January     Session information for accepted papers is now available.
    19 January     The list of accepted papers has been posted. Please see the Paper Submission page for the link.
IMPORTANT DEADLINES
Tutorial Proposal Deadline         Friday, 21 September 2001
Paper Submission Deadline         Monday, 29 October 2001
Paper Acceptance Notification         Friday, 18 January 2002
Author Registration Deadline         Friday, 1 March 2002
Final Submission Deadline         Friday, 1 March 2002
 
 
Site Design by Selcuk Candan -||- Email: support@iscas2002.com -||- Last Updated: 6 March 2002
Graphics provided by Alain Briot -||- Home Page: www.beautiful-landscape.com-||-Bio