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Altera_Forum's avatar
Altera_Forum
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15 years ago

How to use FFT Core with non-complex data?

Hello, I need to involve the FIR function but the FFT core has real and imaginary data I/O Should i connect my input to the REAL input and IMAGINARY input drive to zero vilue? And what's ab...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

The fft splits up signal information into two components (Re,Im) in the frequency domain as you have noticed. The amplitude and phase of signal components can only be derived from both Re/Im. But you can process the signal as a pair or may discard one of them depending on requirements.

I am not sure what you want to do, can you explain in more detail what input you are receiving and what you should output and where is that FIR going to fit?