Receiving Signal Models and Parameters Optimization for Defence System Against Wake Homing Torpedo

The scatter model of ship wake has been presented based on sea surface reverberation theory and acoustic characteristic of bubble to improve defense against the threat of wake homing torpedo. The features of wake echo signal are analysed and calculated quantitatively by combining the measurement data from abroad. The results show that echo pressure depends mainly on size and quantity of bubbles, ship′s immersion depth and speed, and transmission frequency of array. Moreover, this paper presents the design principle and parameters selection for defense system, such as transmission frequency, pulse width and period, as well as work range and depth.