Zhishun Li

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Due to the complexity of its radiated sound, ship recognition is difficult. Fractal approaches are proposed in this study, including fractal Brownian motion based analysis, fractal dimension analysis, and wavelet analysis, to augment existing feature extraction methods that are based on spectrum analysis. Experimental results show that fractal approaches(More)
The acoustic pressure distribution model of a discrete spherical cap array is introduced. Based on a discrete spherical cap array, a new simulation and implementation method for an underwater wideband target echo is proposed. The simulation system consists of transmission and receiving arrays in an anechoic water tank. The weighted signals are transmitted(More)
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