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Altera_Forum
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14 years ago

Strange FFT Output

I've been using SignalTap to create a CSV file of the output from my FFT engine. However, when looking at the output in Matlab, it doesn't look right at all. I know that the ADC's working prop...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Kaz,

Which sampling rate do you mean here?

Further to my previous post, I've realised that the input I'm using is fine. It's in Two's Complement format, which is what the FFT requires.

It's the magnitude data (sqrt(real^2+i^2)) that produces the graphs shown in post# 7, I know there's processing to be done further down the line, but that should give me a couple of peaks for a single sine input.