On rotated time-frequency kernels

M.J. Bastiaans; T. Alieva; L. Stankovic

doi:10.1109/LSP.2002.805118

On rotated time-frequency kernels

M.J. Bastiaans, T. Alieva, L. Stankovic

Research output: Contribution to journal › Article › Academic › peer-review

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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 auto-terms than the corresponding, original time-frequency representations.

Original language	English
Pages (from-to)	378-381
Number of pages	4
Journal	IEEE Signal Processing Letters
Volume	9
Issue number	11
DOIs	https://doi.org/10.1109/LSP.2002.805118
Publication status	Published - 2002

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AB - 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 auto-terms than the corresponding, original time-frequency representations.

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DO - 10.1109/LSP.2002.805118

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