Weakly dispersive modal pulse propagation in the North Pacific Ocean
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Authors
Udovydchenkov, Ilya A.
Brown, Michael G.
Duda, Timothy F.
Worcester, Peter F.
Dzieciuch, Matthew A.
Mercer, James A.
Andrew, Rex K.
Howe, Bruce M.
Colosi, John A.
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Date of Issue
2013-10
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Acoustical Society of America
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en_US
Abstract
The propagation of weakly dispersive modal pulses is investigated using data collected during the 2004 long-range ocean acoustic propagation experiment (LOAPEX). Weakly dispersive modal pulses are characterized by weak dispersion- and scattering-induced pulse broadening; such modal pulses experience minimal propagation-induced distortion and are thus well suited to communications applications. In the LOAPEX environment modes 1, 2, and 3 are approximately weakly dispersive. Using LOAPEX observations it is shown that, by extracting the energy carried by a weakly dispersive modal pulse, a transmitted communications signal can be recovered without performing channel equalization at ranges as long as 500 km; at that range a majority of mode 1 receptions have bit error rates (BERs) less than 10%, and 6.5% of mode 1 receptions have no errors. BERs are estimated for low order modes and compared with measurements of signal-to-noise ratio (SNR) and modal pulse spread. Generally, it is observed that larger modal pulse spread and lower SNR result in larger BERs.
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Article
Description
The article of record as published may be found at https://doi.org/10.1121/1.4820882
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This work was supported by the Office of Naval Research, Code 322, Grant Nos. N00014-06-1-0245, N00014-08-1-0195, and N00014-11-1-0194.
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Citation
Journal of the Acoustical Society of America 134 (2013): 3386, doi:10.1121/1.4820882.
Journal of the Acoustical Society of America 134 (2013): 3386
Journal of the Acoustical Society of America 134 (2013): 3386