Abstract
In this paper, we study the effects of the ocean waveguide on waveforms used in active acoustic localization and detection systems. A broadband normal mode code was developed for use in a Fourier synthesis technique to predict the pressure time series and correlation function of pulsed waveforms. A full suite of signal processing and analysis codes were developed that allow waveforms to be injected into a realistic ocean waveguide environment from a vertical aperture source and propagated to long ranges. The model was used to study the effects of pulse distortion in a convergence zone environment and the impact on replica correlator performance. The predicted correlation structure was studied in terms of correlator loss, maximum active correlator width, and the number of correlator peaks. Comparisons were made between various waveforms, ocean environments, and other factors. We find that observed signals may differ dramatically from input signals after being propagated through the ocean guide.
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References
Benthien, G.W.: 1990, ‘Numerical Modeling of Array Interactions’, in Power Transducers for Sonics and Ultrasonics, B.F. Harmonic, O.B. Wilson, and J.N. Descarpigny eds., Springer-Verlag, 109–124.
Brigham, G.A.: 1974, ‘Analysis of the class-IV flextensional transducer by use of wave mechanics’, J. Acous. Soc. Am. 56, 31–39.
Chertock, G.: 1964, ‘Sound radiation from vibrating surfaces’, J. Acous. Soc. Am. 36, 1305–1313. Chou, S.I.: 1988, ‘Hyperbolic frequency modulated (HFM) waveforms and wavetrains’ TR-1259, Naval Ocean Systems Center, San Diego, CA.
Ding, H., McCleary, L. and Ward, J.: 1971, ‘Computerized Sonar Transducer Analysis and Design Based on Multiport Network Interconnection Techniques’,TP-228, Naval Undersea Research Center, San Diego, CA.
Pritchard, R.L.: 1960, ‘Mutual acoustic impedance between radiators in an infinite rigid plane’, J. Acous. Soc. Am. 32, 733–737.
Rees, C.D.: 1990, frequency synthesis computer program PT4, Naval Ocean Systems Center, San Diego, CA.
Ross, D.: 1976, Mechanics of Underwater Noise, Pergamon Press: New York, Chap. 4.
Ryan, F.: 1989, normal mode computer program ATLAS, Naval Ocean Systems Center, San Diego, CA.
Schenck, H.A. and Benthien, G.W.: 1989, ‘Numerical Solution of Acoustic-Structure Interaction Problems’, TR-1263, Naval Ocean Systems Center, San Diego, CA.
Veenkant, R.L.: 1977, ‘Investigation of the propagation stability of a doubly spread underwater acoustic channel’, IEEE Trans. Acoust., Speech, Signal Proc. ASSP-25, 109–116.
Williams, R.E. and Battestin, H.F.: 1976, ‘Time coherence of acoustic signals transmitted over resolved paths in the deep ocean’, J. Acous. Soc. Am. 59, 312–328.
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© 1993 Springer Science+Business Media Dordrecht
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Ryan, F.J., Rynne, E.F. (1993). Broadband Pulse Distortion: Waveform Design Issues for Active Systems . In: Ellis, D.D., Preston, J.R., Urban, H.G. (eds) Ocean Reverberation. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2078-4_42
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DOI: https://doi.org/10.1007/978-94-011-2078-4_42
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-4922-1
Online ISBN: 978-94-011-2078-4
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