Identification of spherical acoustic objects in motion

Roger F. Dwyer

doi:10.1117/12.190865

28 October 1994 Identification of spherical acoustic objects in motion

Roger F. Dwyer

Proceedings Volume 2296, Advanced Signal Processing: Algorithms, Architectures, and Implementations V; (1994) https://doi.org/10.1117/12.190865
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

Often in applications it is desired to remotely identify an object from its reflected signature. In active sonar the object is insonified by a transmitted waveform which may be broadband (modulated) or narrowband and the received pressure is processed to localize and identify the object. Identification usually requires a broadband transmitted waveform. In this paper the received pressure time series from spherical acoustic objects in motion that have been insonified by linear frequency modulated waveforms are used to identify the objects. Specifically, the unknown object's unknown Doppler using an unique property of the fourth- order spectrum is extracted and then its transfer function is extracted. The results for five spherical acoustic objects in motion are discussed. Three methods, deconvolution, matched filtering, and fourth-order spectrum deconvolution to extract the object's transfer function are compared.

Citation Download Citation

Roger F. Dwyer "Identification of spherical acoustic objects in motion", Proc. SPIE 2296, Advanced Signal Processing: Algorithms, Architectures, and Implementations V, (28 October 1994); https://doi.org/10.1117/12.190865

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