Diversity reception of hydroacoustic signals from the results of experiments in the Black Sea |
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Authors: | E P Gulin |
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Institution: | 1.Andreev Acoustics Institute, Russian Academy of Sciences, ul. Shvernika 4, Moscow, 117036, Russia ; |
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Abstract: | The results are presented of an experimental study of spatial and frequency correlation of amplitude fluctuations of hydroacoustic
signals on two paths of the Black Sea under conditions of a thermal underwater sound channel and tonal-continuous emission
at frequencies of 4 and 1.5 kHz. The emitters were located in the coastal wedge on the bottom slope at depths of 35 and 60
m; a receiver system was submerged to a depth of 50–60 m off the side of a ship drifting at various distances in the open
sea. Data are presented on the spatial (horizontal and vertical) and frequency intervals of fluctuation correlation on the
first path extending 100 km at an emission frequency of 4 kHz under conditions of dominant fast fluctuations, as well as on
the second path extending 300 km at an omission frequency of 1.5 kHz under conditions of dominant slow fluctuations. The results
of experiments are used to estimate the efficiency of space-diversity and frequency-diversity reception of acoustic signals
in application to information transmission over a hydroacoustic channel. |
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Keywords: | |
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