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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.

Abstract

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.

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ID Code: 2608
Item Type: Conference Paper
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
Last Modified: 09 Jun 2010 22:28

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