Waveform Design and Analysis of Torpedo Acoustic Homing in Shallow Water

As one of three major design factors of a torpedo active acoustic homing system, waveform design determines the anti-reverberation capability and accurate parameter estimation of the torpedo active acoustic homing system. In this study, ambiguity function is adapted to analyze the anti-reverberation capability, range and velocity resolution of three typical wideband waveforms, i.e. linear frequency modulation(LFM) waveform, pseudo random binary phase coding waveform, and Costas waveform. Simulation results demonstrate that the pseudo random binary phase coding waveform has the best anti-reverberation performance and joint resolution of velocity and range, and it is suitable to low speed target detection and identification in shallow water. This research may provide a reference for design of torpedo active acoustic homing waveform.