Digital Implementation Forums

Dsp hifi 4 FFT output scaling issue

volansyshem
6 months ago

hi,

  i am doing RFFT with N=32 on RT1060 board and RT600 board. but when i match the FFT output with online fft data.

 the RT600 FFT output not matching. RT1060 output is matching.

  Can you please clear me how can i interpret the output with differrent scaling .

Also there are two functions for FFT , i have used "fft_real32x32" 

but i want to use "fft_realf_ie" but dont know how to get "twiddle factor table of a complex-valued
FFT of size N*twdstep" and twstep.

can you please help me out...

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