Digital Implementation Forums

Dsp hifi 4 FFT output scaling issue

volansyshem
1 month 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...

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.