利用经典的Cooley-Tukey基2算法求复序列的DFT。Cooley-Tukey提出的FFT使N点DFT的乘法计算量有N^2次降为N/2*log2（N）次。-The use of classical Cooley-Tukey algorithm for radix-2 complex DFT sequence. FFT Cooley-Tukey presented enables multiplication of the amount of N-point DFT has N ^ 2 ti
