Underwater acoustic vector communication using particle velocities in shallow water

Time reversal communication with spatially separated large-size receiver array is a method to utilize spatial diversity gain and reduce delay spreads through the correlation of channels. Acoustic vector sensor is advantageous for spatial efficiency than pressure sensor because it is capable of measuring four different components at a single point in space. In recent years, time reversal communication with acoustic vector sensor has been studied. Acoustic vector sensor can get the scalar acoustic pressure, the horizontal components such as x, y-particle velocities and the vertical component such as z-particle velocity, which have different channel characteristics and signal-to-noise ratio each other. In this talk, acoustic communication using the acoustic vector sensor is verified by the communication data collected during Korea Reverberation Experiment (KOREX-17) conducted in shallow water off the south coast of Korea. The results showed that the communication systems including the horizontal components performed better than the systems including vertical component in shallow water at a distance of 1 km or less. [Supported by the Ministry of Oceans and Fisheries, Korea(PMS4110) and ADD]