Computer simulated output electrical signals, based on derived mathematical models, were generated at each element in a receive planar array of complex weighted point sources. The output electrical signals depend on the frequency spectrum of the transmitted electrical signal, the far-field beam patterns of the transmit and receive planar arrays, and the time-invariant, space-variant, random transfer function of the ocean volume which was derived using the WKB approximation. The computer simulated output signals were processed by a three-dimensional FFT beamformer in order to study pulse propagation in a random medium with application to underwater acoustic communication, target detection, and target localization. Preliminary results are reported in this paper.


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    Title :

    Linear time-invariant space-variant filters and the WKB approximation


    Additional title:

    Lineare, zeitinvariante, raumvariante Filter und die WKB-Naeherung


    Contributors:
    Ziomek, L.J. (author) / Vos, J. (author)


    Publication date :

    1985


    Size :

    4 Seiten, 10 Bilder, 15 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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