fft dif的仿真文件，matlab可以使用，能够参考-fft dif simulation files, matlab can be used to reference

1) Goertzel algorithm 2) Chirp transform algorithm 3) Verification of signal flow graphs for DIT and DIF FFT algorithm 4) Elapsed CPU time for DFT and FFT computation 5) Alternative IDFT computations

FFT (DIT/DIF) for matlab