Investigation of the amplitude fluctuations of high-frequency short-duration.sound pulses propagated under short-range shallow-water conditions

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Abstract
This paper reports on part of a general investigation that has been carried out to determine the feasibility and limits of performance of high-data-rate underwater digital data communication. Specifically, the paper deals with the amplitude fluctuations that are encountered when high-frequency 0.8-msec duration pulses are transmitted under short-range shallow-water conditions. In the paper, the results of an analysis of experimentally measured amplitude fluctuations are presented. The results, which are presented in the form of amplitude-frequency spectra, autocorrelation functions, and probability density functions, are interpreted in terms of the prevailing climatic conditions, and the results are related to existing relevant theories of fluctuations. Subject Classification: 30.20.

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