A Method to Extract the Time-Frequency Feature of Underwater Acoustic Signals

One of the key techniques in the identification of underwater target is the analysis of the target underwater acoustic signal. Based on short-time Fourier transform method, this paper presents a extraction method to extract the feature of time-frequency about underwater acoustic signal by the target in water, simulation and analysis of the method is also taken in this paper. The results show that the method to extract the underwater acoustic signal time-frequency feature is feasible and effective.