计算目标和海洋回波的功率谱密度,用于信号特征提取、信号消噪，pwm整流器的建模仿真。- Calculating a target and ocean echo power spectral density, For feature extraction, signal de-noising, Modeling and simulation pwm rectifie.

用于信号特征提取、信号消噪，计算目标和海洋回波的功率谱密度,可直接计算得到多重分形谱。- For feature extraction, signal de-noising, Calculating a target and ocean echo power spectral density, It can be directly calculated multi-fractal spectrum.