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? -- View this message in context: http://gnuradio.4.n7.nabble.com/Handling-of-IQ-files-tp58915p58935.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
