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Underwater acoustic communication is characterized by multipath propagation caused by refraction due to sound speed structure of water medium and multiple interactions with sea surface and bottom interfaces. Such a multipath channel impulse response causes an inter symbol interference (ISI) which degrades the communication performance. Time reversal technique has been used to reduce the ISI. In general, the time reversal requires a receiver array consisting of receivers separated spatially to secure the spatial diversity. However, the size of receiver array is usually restricted by space-constrained environment. Vector sensor can obtain the effect similar to the spatial diversity without spatial arrangement of receivers because the vector sensor can measures x, y, and z-components of acoustic vector quantities such as particle velocity or acceleration as well as acoustic pressure. In this talk, the acoustic communication results obtained using the vector sensor will be presented. The acoustic communication experiment was made as a part of Korea Reverberation Experiment(KOREX-17) in shallow water at location 34° 43′ N, 128° 39′ E from May 23 to May 31, 2017. The communication results show that the vector sensor produces a good performance showing high signal to noise ratio and low bit error rate.
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