DIT FFT | 8 point | Butterfly diagram скачать в хорошем качестве

DIT FFT | 8 point | Butterfly diagram

Follow me on Instagram: https://instagram.com/shinton_seg?utm... Follow me on LinkedIn:   / shinton-george   How to find Twiddle factor    • Twiddle factor | Digital signal processing   Fast Fourier Transform (FFT) The FFT may be defined as an algorithm for computing the DFT efficiently with reduced number of calculations. FFT are of two types Decimation in-time (DIT) FFT algorithm and Decimation-in-frequency (DIF) FFT algorithm The computation of 8-point DFT using radix-2 FFT involves three stages of computation. Here N = 8 that is = 2 to the power 3 . So there will be 3 stages stage 1= four 2-point DFTs stage 2= two 4-point DFTs stage 3= 8-point DFT From the results of four 2-point DFTs, two 4-point DFTs are obtained and from the results of two 4-point DFTs, the 8-point DFT is obtained. 00:00 time domain to frequency domain 00:40 write normal form 01:13 write bit reversed form 03:36 determine the number of stages 07:16 draw four 2 point DFT 07:55 put -1 in the base line 08:12 multiply all base line by twiddle factor 10:30 draw two 4 point DFT 11:04 put -1 in the base lines 11:20 put twiddle factor ahead of cross mark 14:42 draw one 8 point DFT 15:35 put -1 in last four base lines 16:35 multiply twiddle factor ahead of cross mark 20:26 write the sequence X(k) butterfly diagram in dsp dit fft 8 point