Optimisation of the Realisation of Quadratic Discrete Time-Frequency Distributions as a MATLAB Toolbox

O'Toole, John & Boashash, Boualem (2004) Optimisation of the Realisation of Quadratic Discrete Time-Frequency Distributions as a MATLAB Toolbox. In International Conference on Scientific and Engineering Computation, June 2004, Singapore.


An optimised time-frequency signal analysis software tool is presented here as a MATLAB toolbox. This toolbox is implemented using existing and novel methods for a specific class of Time-Frequency Distributions (TFDs) called quadratic TFDs. This is first applied to a TFD called the Wigner-Ville Distribution (WVD), as all other quadratic TFDs can be represented as a smoothed (in both time and frequency) version of the WVD. This method is then extended to the general quadratic TFD case, where the complete implementation optimises both simulation speed and memory usage. Also some quadratic TFDs can be represented in their direct form, such as the Spectrogram and Rihaczek distribution. The optimization of the implementation of these distributions is also examined.

Impact and interest:

Search Google Scholar™

Citation counts are sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

Full-text downloads:

886 since deposited on 21 Nov 2005
18 in the past twelve months

Full-text downloads displays the total number of times this work’s files (e.g., a PDF) have been downloaded from QUT ePrints as well as the number of downloads in the previous 365 days. The count includes downloads for all files if a work has more than one.

ID Code: 2608
Item Type: Conference Paper
Refereed: Yes
Keywords: discrete time, frequency, TFD, efficient realisation, FFT
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Signal Processing (090609)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 2004 (please consult author)
Deposited On: 21 Nov 2005 00:00
Last Modified: 09 Jun 2010 12:28

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page