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Re: [Discuss-gnuradio] Handling of IQ files
From: |
madengr |
Subject: |
Re: [Discuss-gnuradio] Handling of IQ files |
Date: |
Sun, 20 Mar 2016 08:24:27 -0700 (MST) |
Yes, pretty much. With the DFT (and the continuous one) you are correlating
the input waveform with harmonically related, complex sinusoids; essentially
for each harmonic you mix it down to DC then sum (integrate). The FFT is
different (I actually don't know how it works, other than it operates on 2^n
samples), but the output is the same.
Lou
Henry Barton wrote
> I’ve read up on the FFT and DSP and I must say I’m impressed that
> multiplying two waveforms is the digital equivalent of heterodyning. Am I
> right in my understanding that finding frequency components (FFT-ing) is
> simply multiplying a series of known sine waves by your input waveform?
--
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- [Discuss-gnuradio] Handling of IQ files, Henry Barton, 2016/03/19
- Re: [Discuss-gnuradio] Handling of IQ files, Henry Barton, 2016/03/19
- Re: [Discuss-gnuradio] Handling of IQ files, Henry Barton, 2016/03/20
- Re: [Discuss-gnuradio] Handling of IQ files,
madengr <=
- Re: [Discuss-gnuradio] Handling of IQ files, Henry Barton, 2016/03/20
- Re: [Discuss-gnuradio] Handling of IQ files, Henry Barton, 2016/03/20
- Re: [Discuss-gnuradio] Handling of IQ files, Henry Barton, 2016/03/21