Positive Time-Frequency Distributions via Quadratic Programming

Authors:
James W. Pitton
Affiliations:
MathSoft, 1700 Westlake Ave N, Seattle, WA 98109
Venue:
Multidimensional Systems and Signal Processing - Special issue on recent developments in time-frequency analysis
Year:
1998

Citing 4
Cited 1

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Abstract

Anew method for computing positive time-frequency distributions(TFDs) for nonstationary signals is presented. This work extendsthe earlier work of the author and his colleagues in computingpositive TFDs [8,11]. This paper describes a general quadraticprogramming approach to the problem of computing these signal-dependentdistributions. The method is based on an evolutionary spectrumformulation of positive TFDs. The minimization problem reducesto a linearly-constrained quadratic programming problem, forwhich standard solutions are widely available.