A Study on Implementation of Underwater Acoustic Communication Channel using 2-D TLM Modeling and Correlation Function

For telecommunication, radio waves are used in the air, whereas acoustic waves are used in underwater using transducers and hydrophones. And the underwater acoustic communication channels are very complicated than in the air, because of vertical distribution of acoustic velocity according depths, and reflections from boundaries like as surface or bottom, and etc. For the implementation of the underwater acoustic communication channel, traditionally image method or ray tracing method are used[1]. But in image method, it is impossible to consider effects of acoustic velocity according depths. While in ray tracing method, it needs that the sound rays between input and output sensors by trial and error for all directions. In this paper, we introduce a new approach for implementation of underwater acoustic communication channel using 2-D TLM (Transmission Line Matrix) modeling and correlation function. TLM modeling [2-4] is used for simulation of the underwater acoustic wave propagations; cross-correlation function [5] is used for extract the impulse response from the signals on input and output sensors.