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Spectral distance measures between Gaussian processes

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2 Author(s)
Kazakos, D. ; University of Virginia, Charlottesville, VA, USA ; Papantoni-Kazakos, P.

Utilizing asymptotic results from prediction theory of multivariate stationary random processes and from regression theory for multivariate stationary processes, we develop asymptotic (large sample) expressions for the Chernoff coefficient, Bhattacharyya distance, I -divergence and J -divergence between two s -dimensional, covariance stationary Gaussian processes on the basis of n discrete-time samples. The expressions are given in terms of the two spectral density matrices F_{1}(\lambda ), F_{2}(\lambda ) derived from the two autocovariance matrix sequences, and of the spectral density matrix M(\lambda ) related to the sequence of differences of mean vectors. The resulting spectral expressions are useful in a variety of applications, as discussed in the paper.

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Automatic Control, IEEE Transactions on  (Volume:25 ,  Issue: 5 )