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The energy location in the Cohen class of time-frequency distributions is analyzed. If the instantaneous frequency is linear, then only the Wigner distribution produces the ideal energy concentration. The scaled version of the Wigner distribution (L-Wigner distribution), is used to improve the time-frequency representation of signals with nonlinear instantaneous frequencies. In the case of multicomponent signals, the cross terms, appearing in the Wigner distribution and in the L-Wigner distribution, can be easily removed or reduced in a computationally very efficient way. The theory is illustrated on the numerical examples with multicomponent noisy signals
Published in:
Signal Processing, IEEE Transactions on
(Volume:43
,
Issue:
5
)
Date of Publication: May 1995
- Page(s):
- 1262 - 1268
- ISSN :
- 1053-587X
- INSPEC Accession Number:
- 4971248
- Digital Object Identifier :
- 10.1109/78.382413
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- May 1995
- Sponsored by :
- IEEE Signal Processing Society
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