DocumentCode
3326426
Title
On the Unimodality of Deflation based Fast ICA Contrast
Author
Gupta, Malay ; Santhanam, Balu
Author_Institution
Dept. of Electr. & Comput. Eng., New Mexico Univ., Albuquerque, NM
fYear
2005
fDate
Oct. 28 2005-Nov. 1 2005
Firstpage
237
Lastpage
241
Abstract
A general behavioral analysis of the contrast surface for the negentropy based ICA is performed. It is shown that while the convexity of the nonlinearity employed is certainly sufficient to guarantee unimodality of the contrast surface, a milder form of local convexity also ensures unimodality. Several classes of nonlinearities that preserve the unimodality are also introduced. Computer simulations are then used to illustrate the effect of non-convexity on the source separation capabilities of the deflation mode fast-ICA algorithm
Keywords
entropy; independent component analysis; source separation; deflation mode fast-ICA algorithm; negentropy based ICA; source separation; unimodality; AWGN; Application software; Computer simulation; Convergence; Independent component analysis; Performance analysis; Principal component analysis; Robustness; Source separation; Stability;
fLanguage
English
Publisher
ieee
Conference_Titel
Signals, Systems and Computers, 2005. Conference Record of the Thirty-Ninth Asilomar Conference on
Conference_Location
Pacific Grove, CA
ISSN
1058-6393
Print_ISBN
1-4244-0131-3
Type
conf
DOI
10.1109/ACSSC.2005.1599740
Filename
1599740
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