A simple scheme for enhanced reassignment of the SPWV representation of noisy signals

AT Loza, CN Canagarajah, DR Bull

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

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Abstract

The reassignment procedure has often been employed to improve readability of some time-frequency representations (TFRs). When processing noisy signals, the problem of sensitivity of the technique to noise is encountered. In this paper, a simple modification of reassignment method is proposed, based on thresholding operation. Specifically, by preventing the reassignment of the distribution coefficients below the noise dependent threshold and replacing them with zeros, the enhanced signatures on the time-frequency plane are obtained. This method is compared with other techniques, such as the reassigned spectrogram (RSP) and the supervised reassigned spectrogram (SRSP). An experimental test of these algorithms as the instantaneous frequency (IF) estimators for a chirp signal have shown that our method improves the accuracy of the estimation for heavy noise.
Translated title of the contributionA simple scheme for enhanced reassignment of the SPWV representation of noisy signals
Original languageEnglish
Title of host publication3rd International Symposium on Image and Signal Processing and Analysis (ISPA 2004) Rome, Italy
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages630 - 633
Number of pages4
Volume2
ISBN (Print)953184061X
DOIs
Publication statusPublished - Sep 2003
Event3rd International Symposium on Image and Signal Processing and Analysis, 2003 - Rome, Italy
Duration: 18 Sep 200320 Sep 2003

Publication series

Name
ISSN (Print)13301012

Conference

Conference3rd International Symposium on Image and Signal Processing and Analysis, 2003
CountryItaly
CityRome
Period18/09/0320/09/03

Bibliographical note

Rose publication type: Conference contribution

Sponsorship: This work is supported by AMS UK

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