Underwater acoustic channel characterization at 6kHz and 12kHz in a shallow water near Jeju Island

An underwater acoustic communication experiment (JACE13) has been performed in a shallow water near Jeju Island. One of its main purposes is to measure underwater acoustic channels at 6 and 12 kHz. During the experiment we used an array of four hydrophones and altered the horizontal distance and depth of the transmitting source. Both narrowband and broadband signals are used for channel probing. In this paper the experimental data are analyzed using statistical approach. Coherence time, probability density functions (PDFs), level crossing rate, and channel responses are obtained. The results show that the channel behaves as a Rayleigh or Rician fading channel. We also found that the number of multi-paths and delay spread decrease as the horizontal range increases.