抽样定理在计算机上的图形表示

ILLUSTRATING THE SAMPLING THEOREM ON COMPUTER

利用计算机数学软件 MATLAB编程先把连续信号的傅立叶变换信号形象地在计算机上显示出来 ,然后把抽样信号的傅立叶变换信号也形象地在计算机上进行显示 ,通过图形对比 ,可以加深对抽样定理的理解 .

Using the MATLAB, it is easily to draw the figures of continuous time signal and its Fourier transform signal on computer. Using two different sampling time, the figures of sampling signal and its discrete time Fourier transform signal are obtained. Comparing one with another, the sampling theorem is deeply understood.