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Optimal kernel design of smooth-windowed wigner-ville distribution for digital communication signal

Mohd. Mokji, Musa (2007) Optimal kernel design of smooth-windowed wigner-ville distribution for digital communication signal. In: Advances In Digital Signal Processing Applications. Penerbit UTM , Johor, pp. 20-46. ISBN 978-983-52-0652-8

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Bilinear time-frequency analysis has been widely used to analyze time-varying signals such as in speech, music and other acoustical signals, sonar, radar, geophysics and biological signals. However, a major drawback of this method is the presence of cross-terms in the time-frequency representations (TFR’s) [1]. These terms, if not removed, will reduce the auto-terms resolution and make interpretation of the true signal characteristics difficult [2]. To overcome this, most of the TFD’s employ some kind of smoothing kernel, window, or filter [3]. Smoothing however, causes the autoterms to be smeared and as a result, the TFR losses its concentration [4]. For signal analysis and classification, an optimal distribution should have reasonable cross-terms suppression and minimal smearing of the auto-terms. Previous works have shown that the optimal kernel is signal-dependant [2,3,5]. Generally, there is no known practical fixed kernel TFD which would perform well for all signals. A kernel might perform very well for a certain class of signal but is not optimal for other type of signals. Most of the researches in optimal kernel design focus mainly on linear FM [2,3,5,6] and biological signals [7,8]. Not much attention has been given to digital communication signals.

Item Type:Book Section
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:13747
Deposited By: Liza Porijo
Deposited On:11 Aug 2011 03:23
Last Modified:11 Aug 2011 03:23

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