Forum Discussion
Altera_Forum
Honored Contributor
Honored Contributorabout fft ip core
I'v read the document about the fft ip core(ug_fft.pdf), the document says "For single engine output FFT/IFFTs, there is an additional factor of Q and the shift must be 2-exponent – Q, where Q = 1...
Altera_ForumHonored Contributor
Honored ContributorSounds like it should be this way...
512 points = 2^9 exponent points, therefore: => exponents = 9 => Q = 2 Therefore, shift amount = 2^(-exponent-Q) = 2^-11 1024 points = 2^10 points, thherefore: => exponents = 10 => Q = 1 Therefore shift amount is also 2^-11
