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    Decomposition of seismic signals via time-frequency representations

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    Author
    Tobback, Tom
    Steeghs, Philippe
    Drijkoningen, Guy G
    Fokkema, Jacob T
    Type
    Conference paper
    Keywords
    geophysics
    Citation
    T. Tobback, P. Steeghs, G. G. Drijkoningen and J. T. Fokkema, "Decomposition of seismic signals via time-frequency representations," 1996.
    Abstract
    In this paper we discuss the use of a time-frequency representation, the Wigner distribution, for the decomposition and characterization of seismic signals. The advantage of the Wigner distribution over other representations, such as the wavelet and sliding window Fourier transform, is its sharp localization properties in the time-frequency plane. However, the Wigner distribution is a not a linear transformation. This non-linearity complicates the use of the Wigner distribution for time-frequency filtering and decomposition. We present an optimization method for the reconstruction of a time signal from its Wigner distribution. The reconstruction technique enables a decomposition of a signal into its time-frequency components, where the reconstructed components are stripped off from the signal one by one. The method is illustrated a real data example. We also demonstrate how the decomposition can be used for suppression and enhancement of events in the time-frequency plane.
    Date
    1996-01-15
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    • ECE Publications [1278]

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    Managed by the Digital Scholarship Services at Fondren Library, Rice University
    Physical Address: 6100 Main Street, Houston, Texas 77005
    Mailing Address: MS-44, P.O.BOX 1892, Houston, Texas 77251-1892