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 | |
| Publication status | Published - 2002 |