利用离散傅立叶变换转置因子的性质进行各种变换，将长序列分解成几个较短的序列，从而实现时间抽取和频率抽取两种方法的基-2快速傅立叶变换，并且能够进行两个序列的线性卷积运算和频谱分析。-Use of discrete Fourier transform to buy a variety of factors transform the nature of the long sequence into several shorter sequences, in order to achieve tim