On rotated time-frequency kernels | IEEE Journals & Magazine | IEEE Xplore

On rotated time-frequency kernels


Abstract:

The principal axes of the time-frequency representation of a signal are defined as those mutually orthogonal directions in the time-frequency plane for which the width of...Show More

Abstract:

The principal axes of the time-frequency representation of a signal are defined as those mutually orthogonal directions in the time-frequency plane for which the width of the signal's fractional power spectrum is minimum or maximum. The time-frequency kernels used in the Cohen class of time-frequency representations are then rotated in the time-frequency plane, in order to align the kernels' preferred axes to the signal's principal axes. It is shown that the resulting time-frequency representations show a better reduction of cross-terms without too severely degrading the autoterms than the corresponding original time-frequency representations.
Published in: IEEE Signal Processing Letters ( Volume: 9, Issue: 11, November 2002)
Page(s): 378 - 381
Date of Publication: 30 November 2002

ISSN Information:


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