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Altera_Forum
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14 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
14 years ago

In that case you already know what to do: A = sqrt(Re^2 + Im^2).

sqrt is a bit demanding in fpga but there are ips. You may just use A^2 then convert it in software.