Digital Design Method of Echo Signal Model for Underwater Active Acoustic Detection

In the underwater active acoustic detection system, the underwater active acoustic detection echo signal model is a model of the influence of underwater external environmental factors on the signal waveform. Based on the analysis of the principle of the underwater active acoustic detection echo signal, the paper studies the transmission law of the underwater echo signal according to the bottom-up detection method and the digital modeling method based on the Matlab-Simulink platform. Simulation verification is carried out through the built model to reflect the signal decay characteristics, echo characteristics, reverberation and noise effects.