本程序利用MATLAB进行数字信号的频谱分析，适用于DSP的初学者。代码里应用了矩形窗和汉明窗两种窗函数进行对比分析。-This procedure carries on the digital signal using MATLAB the spectral analysis, is suitable in the DSP beginner. In the code has applied the rectangular window and the hamming window two ki