How to implement IFFT by megafunction?

Altera_Forum · ‎06-06-2012

Hi,

In my project, I have to implement the FFT and IFFT operators.

I have seen megafunction FFT integrated in Quartus II, but I don't know where's the IFFT core.

Please show me where's IFFT core.

Is the IFFT and the FFT core are the same?

Thanks,

Altera_Forum · ‎06-06-2012

i dont know if you still look at this, but theres a guy called "wronghorizon", he or she has solved any fft function, try find him or her

Altera_Forum · ‎06-06-2012

thanks Sam_novie,

I'm trying to contact with him,

Any other suggestion?

Altera_Forum · ‎06-07-2012

The IFFT can be implemented with an FFT. IIRC you need to do a conjugate operation on both the input and the output, and you may need to do a scaling (divide by N I think).

Altera_Forum · ‎06-07-2012

Thanks you Daixiwen!

Altera_Forum · ‎08-02-2012

I found it.

Simply, there is a control signal named "inverse". When I set it to zero, the block is FFT, when I set it on one, it's IFFT.

Thanks, all.