The-frequency--processing

代码说明：

  对信号的频域处理和结果的现实，有了它，你只需要选择信号对象就可以对其处理和结果分析，也便于对频域的理解(The frequency domain signal processing and the results of the reality, with it, you only need to select the signal objects can be processed and the results of its analysis, but also facilitate the understanding of the frequency domain)