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Informative priors for minimum cross-entropy positive time-frequency distributions

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4 Author(s)
Shah, S.I. ; Dept. of Electr. Eng., Pittsburgh Univ., PA, USA ; Loughlin, P.J. ; Chaparro, L.F. ; El-Jaroudi, A.

A method for generating an informative prior when constructing a positive time-frequency distribution (TFD) by the method of the minimum cross-entropy (MCE) is developed. The prior is obtained from a combination of the Wigner distribution (WD) and the evolutionary periodogram, and results in a more informative MCE-TFD, as quantified via the mutual information of the distribution. The procedure allows any of the bilinear distributions to be used in the prior. Examples illustrate the performance of the new technique.

Published in:

Signal Processing Letters, IEEE  (Volume:4 ,  Issue: 6 )