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 section file mysecond.m give multiple fft to achieve method and code into multiple m 未拆