We consider the problem of separating colorred signals mixed by

unknown convolutive channels. We introduce a variation of a previous

approach of separating signals via decorrelation. This variation

minimizes the mutual correlation among the output signals of

a decorrelation matrix subject to a diagonal constraint. The diagonal

constraint ensures a better quality of separation. The diagonal

constraint is shown to be essential when the number of original

signals is less than the number of distorted signals.

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In  Proc. of the Int. Conf. on Acoustics, Speech, and Signal Processing

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