数字信号处理实验内容，编写能够实现fft的matlab程序，并与系统自带的fft相比较。在文件mysecond.m中注释部分给出多种fft实现方法及代码，未拆分成多个m文件-Digital signal processing experiment content, the preparation can be achieved fft matlab program, and compared with the system comes with the fft. The comment sect