分析了舰船辐射信号的混沌特征。
研究了基于听觉模型的水声信号特征提取方法，提取了舰船辐射噪声的听觉特征。
The approach of how to extract underwater acoustic signal with auditory model is studied and the auditory features of ship-radiated noise is extracted.
通过水池联调和海上实测验证，表明：模拟器除了能够发射CW、LFM等常用的水声信号外，还能够模拟产生具有特定特征的舰船辐射噪声。
Experiments on the test pool and open sea have proved that this simulator could not only transmit acoustic signals like CW and LFM, but also generate ship radiated noise with specific characteristics.
舰船辐射噪声信号的特征提取技术因其在水下装备中具有重要的应用价值，一直是国内外研究的热点和难点。
The technique of feature extraction of ship-radiated noise is of importance to underwater equipment, and it is a hotspot and difficult area in the national and international research.
由此可利用信号双谱，提取舰船辐射噪声信号的非高斯成份。
Therefore, bispectrum is used to extract the non gaussian ingredients from the noise signals of ships.
试验结果表明，在选择了适当的小波基函数和阈值的情况下，采用小波变换的消噪方法对舰船辐射噪声信号进行消噪处理，可以取得良好的效果。
The results prove that we can get a very effective outcome by the method of wavelet transformation if the adaptive wavelet base and threshold value are chosen.
试验结果表明，在选择了适当的小波基函数和阈值的情况下，采用小波变换的消噪方法对舰船辐射噪声信号进行消噪处理，可以取得良好的效果。
The results prove that we can get a very effective outcome by the method of wavelet transformation if the adaptive wavelet base and threshold value are chosen.
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