使用图形化的方法显示傅里叶变换的一些性质(至少应包括时移性质和尺度变换性质)

对于信号的时移和频谱的关系，选择一个信号，让它在时域上作移位，可调节不同的时移大小，然后用软件演示其傅立叶变换在幅度上几乎没有变换，但在相位上会有变化。

对于信号的时间与频率的尺度变换，给出一个信号，保持其幅度不变，让信号的宽度发生变化，再观察其频域的变化。-Using a graphical method to display some of the properties of the Fourier transform (should include at least the time-shift the nature of the nature and scale transformation) for the signal time shift and the relationship of the spectrum, to select a signal, it shift in the time domain, size, then adjust the different time-shifting software demo Fourier transform almost no transformation in amplitude, but there will be changes in the phase. Scale transformation for the time and frequency of the signal, a signal is given, and to maintain a constant amplitude, so that the width of the signal change, and then observe the changes in the frequency domain.