运用MATLAB编程得到简单信号、简单信号运算、复杂信号的谱和功率谱图，复杂信号的谱存在线谱和连续谱，并分析其组成。,Be simple to use MATLAB programming signal, a simple signal computing, complex signal and power spectrum of the spectrum, the existence of complex signal spectrum line spectrum and continuous spectrum, and to analyze its composition.