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Effects of Cauchy integral formula discretization on the concentration of time-frequency (TF) distribution are analyzed. As a result of this discretization, new forms of distributions are produced. In order to increase the accuracy of instantaneous frequency (IF) estimation, two solutions are considered: increasing the number of integration points and multiple successive integrations using the same number of points (it corresponds to the L-form of the TF distribution). In practical applications, the L-form of the fourth-order complex-lag distribution produces very efficient representation. In this case, the analysis of noise influence is also provided.
Published in:
Signal Processing Letters, IEEE
(Volume:16
,
Issue:
4
)
Date of Publication: April 2009
- Page(s):
- 327 - 330
- ISSN :
- 1070-9908
- INSPEC Accession Number:
- 10586194
- Digital Object Identifier :
- 10.1109/LSP.2008.2011711
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 10 March 2009
- Issue Date :
- April 2009
- Sponsored by :
- IEEE Signal Processing Society
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