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Diversity combining for long-range acoustic communication in deep water

Author:
Song, H. C.   Hodgkiss, W. S.  


Journal:
The Journal of the Acoustical Society of America


Issue Date:
2012


Abstract(summary):

A recent experiment showed that coherent long-range acoustic communication is feasible in deep water over a similar to 550km range between a source towed slowly at similar to 75m depth and a horizontal line array towed at 3.5 knots at similar to 200m depth. This letter further demonstrates that diversity combining mitigates channel fading and increases the output signal-to-noise ratio. Using sparse channel-estimate-based equalization, three transmissions are combined successfully to decode a 40 Hz bandwidth (230-270 Hz) 8 phase-shift-keying communication signal, achieving an effective data rate of 17 bits/s at similar to 550km range. (C) 2012 Acoustical Society of America


Page:
EL68


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