Analysis of Channels Impulse Response Due to Transducer Movements in Underwater Acoustic Communication

This study discussed the effect of transducer movement in underwater acoustic communication based on simulation analysis. A proposed underwater communication testing platform which is a 10 m x 2.5 m x 1.5 m mini towing tank is used as the communication channel. In the simulation analysis, channels boundary interaction is simulated using image method consists of 6 ray element and the transducer movements is assumed to have relative velocity between each other. Due to the relative velocity, Doppler frequency shift is occurred and gives amplitude variation in Channels Impulse Response (CIR). Several Doppler spread value was given to analyze the CIR. The simulation result indicates that, Relative velocity Doppler effects contributes big amplitude variation in the arrival structure of channels impulse response (CIR). When relative velocity or Doppler spread increases, the amplitude variation and the phase variation of arrival structure also increases.