该程序用于基于认知无线电NC-OFDM系统的仿真，用来计算信号的功率谱密度-The program for the NC-OFDM Cognitive Radio system simulation for calculating the power spectral density of the signal。

关于非线性离散系统辨识，旋转机械二维全息谱计算，计算目标和海洋回波的功率谱密度。- Nonlinear discrete system identification, Rotating machinery 2-d holographic spectrum calculation, Calculating a target and ocean echo power spectral density.