非对角切片谱法提取平方相位动态耦合信号研究

将三阶累积量非对角切片谱法应用到水下目标辐射相位动态耦合信号的特征提取中。文中研究了三阶累积量非对角切片谱的性质，定义了相位动态耦合的概念，提出了基于三阶累积量非对角切片谱提取水中目标辐射平方相位动态耦舍信号谱的方法，进行了仿真研究，并与自相关谱方法进行了比较。结果表明：该方法成功地从拉普拉斯噪声环境中提取了参加平方相位动态耦舍的信号谱和平方相位动态耦合产生的信号谱；有效地抑制了拉普拉斯噪声：这种方法计算量小。

A Special Feature Extraction Method for Square Phase Dynamic Coupling Signals

For improving the ability of the underwater detection system to detect underwater moving target, a special feature extraction method for underwater moving target-radiated square phase dynamic coupling signals is developed on the basis of analyzing and studying the property and performance of third order cumulant non-diagonal slice. In this method, we take full advantage of the ability to handle Gaussian noise, and colored non-Gaussian noise and the performance of wiping off the independent frequency component of underwater moving target-radiated signals. Simulational test with the underwater moving target-radiated data is also included. Results show that the method successfully extracts the attended phase dynamic coupling frequency components and procreant frequency components for dynamic coupling, and effectively suppresses Laplacian noise. So the performances in these aspects are superior to that of autocorrelation method.