Monthly
288 pp. per issue
6 x 9, illustrated
ISSN
0899-7667
E-ISSN
1530-888X
2014 Impact factor:
2.21

Neural Computation

November 15, 1999, Vol. 11, No. 8, Pages 1875-1883
(doi: 10.1162/089976699300015990)
© 1999 Massachusetts Institute of Technology
Natural Gradient Learning for Over- and Under-Complete Bases in ICA
Article PDF (134.35 KB)
Abstract

Independent component analysis or blind source separation is a new technique of extracting independent signals from mixtures. It is applicable even when the number of independent sources is unknown and is larger or smaller than the number of observed mixture signals. This article extends the natural gradient learning algorithm to be applicable to these overcomplete and undercomplete cases. Here, the observed signals are assumed to be whitened by preprocessing, so that we use the natural Riemannian gradient in Stiefel manifolds.