FFT development kit manual V1.0

Fast Fourier Transform product manual

February 2006 www.4dsp.com - 7 -

• TestData.bin.txt

• Twiddles.float.txt

• Twiddles.bin.txt

The parameters file is:

• TestData.params.txt

3.3 FFT

The FFT is always performed on the data in file ‘TestData.bin.txt’. FFT direction can be

forward or inverse and 1D and 2D FFTs are supported.

Two files are generated:

• TestData.fft.bin.txt

• TestData.fft.float.txt

3.3.1 1D FFT

Input parameters include direction (inverse or forward), FFT length (between 64 and 1M

point and power of 2), and number of FFTs (loops). For a 1D FFT, number of FFTs *

FFT length must not exceed 1M (= 1K x 1K).

3.3.2 2D FFT

Input parameters include direction (inverse or forward), FFT side length (between 64 and

1024 point and power of 2), and number of FFTs (loops). For a 2D FFT, number of FFTs

* side length * side length must not exceed 1M (= 1K x 1K).

if you need more explanation on fft you can use the key search (fft + muzhir), beacuse i published many papers on this work