A cumulant-based method for the direct estimation of the spatial Wiener filter

Authors:
B. Friedlander;S. Bose
Affiliations:
Department of Electrical Engineering, University of California, 1156 High Street, MS:SOE2, Santa Cruz, CA 95064, USA;Department of Electrical Engineering, University of California, 1156 High Street, MS:SOE2, Santa Cruz, CA 95064, USA
Venue:
Digital Signal Processing
Year:
2006

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Abstract

In this paper we propose a new algorithm for performing blind source separation and signal recovery for the narrowband case. This algorithm seeks to estimate and implement the Wiener filter directly, using the second- and fourth-order cumulants. The estimated filter is asymptotically consistent with or without noise, and is not subject to the bound imposed by pre-whitening as with some existing algorithms. In many cases it nearly achieves the clairvoyant Wiener limit as performance studies show.