The shallow-water acoustic channel supports far-field propagation in a discrete set of modes. Ocean experiments have confirmed the modal nature of acoustic propagation, but no experiment has successfully excited only one of the suite of mid-frequency trapped modes propagating in a coastal environment. The ability to excite a single mode would be a powerful tool for investigating shallow-water ocean processes. A feedback control algorithm incorporating elements of adaptive estimation, underwater acoustics, array processing, and control theory to generate a high-fidelity single mode is presented. This approach also yields a cohesive framework for evaluating the feasibility of generating a single mode with given array geometries, noise characteristics, and source power limitations. Simulations and laboratory wave guide experiments indicate the proposed algorithm holds promise for ocean experiments.


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    Title :

    Single-mode excitation in the shallow-water acoustic channel using feedback control


    Additional title:

    Akustische Fernfeldausbreitung im küstennahen Meerwasser. Untersuchungsergebnisse zum akustischen Nachrichtenübertragungskanal mit Ein-Moden-Anregung und adaptiven Rückkopplungs-Algorithmus


    Contributors:
    Buck, J.R. (author) / Preisig, J.C. (author) / Johnson, M. (author) / Catipovic, J. (author)

    Published in:

    Publication date :

    1997


    Size :

    11 Seiten, 28 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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