Thank you very very much !
Inviato da iPhone > Il giorno 19 apr 2021, alle ore 22:36, Ron Economos <[email protected]> ha > scritto: > > > The QT GUI Frequency Sink does have a option to hide the other side of the > spectrum. When float input is selected, an additional parameter "Spectrum > Width" is available. Options are "Full" and "Half". > > Ron > >> On 4/19/21 12:03, Kevin Reid wrote: >> On Mon, Apr 19, 2021 at 11:44 AM Alberto <[email protected]> wrote: >>> To obtain a real FFT i can use Float to Complex block ? >> >> Float to Complex will do the same thing you're seeing now — it just writes a >> zero imaginary component into the stream. >> >> If you need a signal with an actually one-sided spectrum you can use the >> Hilbert block, which uses the Hilbert transform to generate a 90° phase >> shifted quadrature component. But that is just wasted compute cycles unless >> your next signal processing step actually needs that result. For viewing >> purposes, just ignore the other side of the spectrum. (It would be nice if >> the QT GUI Frequency Sink had an option to hide it when given float input, >> but as far as I know, it doesn't.)
