Robust spatial time-frequency distribution matrix estimation with application to direction-of-arrival estimation

Authors:
W. Sharif;Y. Chakhchoukh;A. M. Zoubir
Affiliations:
Signal Processing Group, Technische Universität Darmstadt, Merckstr. 25, Darmstadt 64283, Germany;Signal Processing Group, Technische Universität Darmstadt, Merckstr. 25, Darmstadt 64283, Germany;Signal Processing Group, Technische Universität Darmstadt, Merckstr. 25, Darmstadt 64283, Germany
Venue:
Signal Processing
Year:
2011

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Abstract

We consider the problem of estimating spatial time-frequency distribution (STFD) matrices in the presence of impulsive noise. STFD matrices are widely used in sensor array processing for direction-of-arrival estimation and blind source separation of non-stationary sources. Conventional methods fail when the noise is non-Gaussian or impulsive. We propose robust techniques for STFD estimation which are based on pre-processing, robust position based estimation and robust covariance based estimation. The proposed methods are compared in terms of direction-of-arrival estimation performance.