Robust coherence spectrum estimation

Authors:
Andreas Jakobsson;Naveed R. Butt
Affiliations:
Centre for Mathematical Sciences, Lund University, Lund, Sweden;Centre for Mathematical Sciences, Lund University, Lund, Sweden
Venue:
DSP'09 Proceedings of the 16th international conference on Digital Signal Processing
Year:
2009

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Abstract

In this paper, we introduce robust versions of the recently introduced Capon- and APES-based Magnitude Square Coherence (MSC) spectral estimators. The estimators exploit the related recent development on robust beamforming to allow for imperfect knowledge of the estimated sample correlation matrix. The resulting estimators are found to yield improved estimates as compared to the earlier estimators.