Title :
Informative priors for minimum cross-entropy positive time-frequency distributions
Author :
Shah, S. Ismail ; Loughlin, Patrick J. ; Chaparro, Luis F. ; El-Jaroudi, Amro
Author_Institution :
Dept. of Electr. Eng., Pittsburgh Univ., PA, USA
fDate :
6/1/1997 12:00:00 AM
Abstract :
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.
Keywords :
Wigner distribution; minimum entropy methods; spectral analysis; time-frequency analysis; Wigner distribution; bilinear distributions; evolutionary periodogram; informative priors; minimum cross-entropy; mutual information; performance; positive time-frequency distributions; spectrograms; Discrete Fourier transforms; Entropy; Frequency; Information resources; Mutual information; Signal processing; Spectrogram;
Journal_Title :
Signal Processing Letters, IEEE
