Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

FFT IFFT Unity gain output

Hello, I am using the DE2 board (cyclone II fpga) for my project. I took sound input using the internal audio codec (in 16 bit mode) then I pass it through FFT and then IFFT block. Finally i us...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I am having trouble dealing with the scaler.v file to create my own scaler and implement it on FFT - IFFT block. I'm using DE2 board as well. Setting a 128 points and 16 bits. I am thinking that with the fft of 128 points and ifft of 128 points, we would get 256 points of the entire block. That makes the FFT engine to have a max of -11 to min of -3 by referring to Table A-1 on the FFT Megacore Function User Guide. However, I am still having hard time dealing with the scaling codes. Can anyone please help me out here?