Robust coherence spectrum estimation
DSP'09 Proceedings of the 16th international conference on Digital Signal Processing
A computationally efficient algorithm for the 2D covariance method
SC '13 Proceedings of the International Conference on High Performance Computing, Networking, Storage and Analysis
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In this correspondence, we extend the recently introduced one-dimensional Capon-based Magnitude Square Coherence (MSC) spectral estimator, to form two-dimensional Capon- and Amplitude and Phase EStimation (APES)-based MSC spectral estimators. The resulting estimators are found to yield significantly improved estimates as compared to the typical Welch-based estimator. Furthermore, we introduce a computationally efficient time-updating of the presented MSC estimators, exploiting their inherent time-varying displacement structure. The presented updating is found to dramatically lower the computational requirement of reevaluating the MSC spectral estimates