A Critical Examination of Time-Frequency Filtering

Kootsookos, Peter J. (1990). A Critical Examination of Time-Frequency Filtering. In: Boashash, Boualem and Boles, Peter, International Symposium on Signal Processing and Its Applications 1990, Gold Coast, (174-177). August.

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Author Kootsookos, Peter J.
Title of paper A Critical Examination of Time-Frequency Filtering
Conference name International Symposium on Signal Processing and Its Applications 1990
Conference location Gold Coast
Conference dates August
Publication Year 1990
Sub-type Fully published paper
Editor Boashash, Boualem
Boles, Peter
Volume 1 of 2
Start page 174
End page 177
Abstract/Summary Recent investigations have lead to the use of TFRs to filter noise-corrupted, frequency varying signals. This approach appeals to the intuition as a logical extension of linear, time-invariant filter theory. In this paper, TFRs which belong to the generalized class first introduced by Cohen are examined for suitability for time-frequency filtering of signals possessing several harmonic components. We conclude that, due to the bilinear nature of the representations examined, a destructive phase scrambling of the signal components occurs. This will happen whenever any modification is made to a TFR of Cohen's class. The result is that time-frequency filtering seems to be inappropriate when applied to noisy harmonic signals using members of Cohen's class.
Subjects 280204 Signal Processing
Keyword Noise filter
filter theory
signal scrambling
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Unknown

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Created: Fri, 12 Mar 2004, 10:00:00 EST by Peter Kootsookos