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Fractional Fourier transform, impulse response, seabed classification, time-frequency distributions, volume search sonar
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Full-Text Articles in Engineering
Acoustic Seabed Classification Using Fractional Fourier Transform, Madalina Barbu, Edit J. Kaminsky, Russell E. Trahan
Acoustic Seabed Classification Using Fractional Fourier Transform, Madalina Barbu, Edit J. Kaminsky, Russell E. Trahan
Electrical Engineering Faculty Publications
In this paper we present a time-frequency approach for acoustic seabed classification. Work reported is based on sonar data collected by the Volume Search Sonar (VSS), one of the five sonar systems in the AN/AQS-20. The Volume Search Sonar is a beamformed multibeam sonar system with 27 fore and 27 aft beams, covering almost the entire water volume (from above horizontal, through vertical, back to above horizontal). The processing of a data set of measurement in shallow water is performed using the Fractional Fourier Transform algorithm in order to determine the impulse response of the sediment. The Fractional Fourier transform …