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Nonstationary signal classification using pseudo power signatures

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Title: Nonstationary signal classification using pseudo power signatures
Author: Venkatachalam, Vidya; Aravena, Jorge.L.
Type: Conference Paper
Keywords: nonstationary signals; Continuous Wavelet Transform; Singular Value Decomposition
Citation: V. Venkatachalam and J. Aravena,"Nonstationary signal classification using pseudo power signatures," in IEEE International Symposium on Circuits and Systems (ISCAS),
Abstract: This paper deals with the problem of classification of nonstationary signals using signatures which are essentially independent of the signal length. We develop the notion of a separable approximation to the Continuous Wavelet Transform (CWT) and use it to define a power signature. We present a simple technique which uses the Singular Value Decomposition (SVD) to compute such an approximation, and demonstrate through an example how it is used to perform the classification process. This example serves to show both the effectiveness and limitations of the approach. Our main result is an alternate approach which develops the idea of using orthogonal projections to refine the approximation process, thus allowing for the definition of better signatures.
Date Published: 1998-06-20

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  • ECE Publications [1082 items]
    Publications by Rice University Electrical and Computer Engineering faculty and graduate students
  • DSP Publications [508 items]
    Publications by Rice Faculty and graduate students in digital signal processing.