Forum Discussion

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

FFT Megafunction Fixed Point

I'm trying to use Altera's FFT Megafunction in Fixed Point mode but I didn't find any documentation defining how many bits it uses for decimal part. I'm using the Variable Streaming because its the o...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I think you need to scale the input up in such a way that you have 32 bits integer and the scale it down in the output. In other words you need to do a bit casting.