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- W2024496345 abstract "During the July 2003 acoustic communications experiment conducted in 100m deep water off the western side of Kauai, Hawaii, a 10s binary phase shift keying signal with a symbol rate of 4kilosymbol∕s was transmitted every 30min for 27h from a bottom moored source at 12kHz center frequency to a 16 element vertical array spanning the water column at about 3km range. The communications signals are demodulated by time reversal multichannel combining followed by a single channel decision feedback equalizer using two subsets of array elements whose channel characteristics appear distinct: (1) top 10 and (2) bottom 4 elements. Due to rapid channel variations, continuous channel updates along with Doppler tracking are required prior to time reversal combining. This is especially true for the top 10 elements where the received acoustic field involves significant interaction with the dynamic ocean surface. The resulting communications performance in terms of output signal-to-noise ratio exhibits significant change over the 27h transmission duration. This is particularly evident as the water column changes from well-mixed to a downward refracting environment." @default.
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- W2024496345 date "2008-02-01" @default.
- W2024496345 modified "2023-10-18" @default.
- W2024496345 title "Impact of ocean variability on coherent underwater acoustic communications during the Kauai experiment (KauaiEx)" @default.
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- W2024496345 doi "https://doi.org/10.1121/1.2828055" @default.
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