Re: [Discuss-gnuradio] USRP GNU radio receiver

Hi Marcus,

Thank you for tip!

I know that calibration is not so easy but I hope that.

Could you help me to understand what happened with a constant complex baseband signal?

I am beginner in this field.

Thank you for your time.

Best Regards,

Simona

Il giorno mar 16 lug 2019 alle ore 17:39 Müller, Marcus (CEL) <mueller@kit.edu> ha scritto:

Watch out! What do you get at the *output* of your SDR device when you
transmit a constant complex baseband signal, mixed to a carrier
frequency? How does that differ from transmitting a complex baseband
sinusoid mixed to a carrier frequency?

On Tue, 2019-07-16 at 18:32 +0200, sumit kumar wrote:
> Ok, so for a constant source, in the time domain you will see a flat signal only! Try connecting a spectrum analyzer and you shud see a peak at DC becz Fourier transform of constant signal is impulse.
> And yes, as Marcus said, increase the sampling rate!
>
>
> On Tue, 16 Jul 2019 at 18:06, Simona Sibio <ssibio2@gmail.com> wrote:
> > Thank you for the assistance.
> >
> > I put the module "constant source" in my flow grap.
> > With this module, I can choose witch amplitude I want to send.
> > I attached the flow graph.
> > And, I would want to read these values in the receiver.
> >
> > Simona
> >
> > Il giorno mar 16 lug 2019 alle ore 16:58 sumit kumar <sumitstop@gmail.com> ha scritto:
> > > Hi Simona, what is the "constant signal" here ?
> > >
> > > On Tue, 16 Jul 2019 at 17:54, Simona Sibio <ssibio2@gmail.com> wrote:
> > > > Hi all,
> > > >
> > > > I want to use GNU radio to measure the amplitude and the phase of a signal.
> > > > I send a constant signal with the transmitter USRP but in the receiver there is a flat signal with amplitude 0 and offset 0.
> > > > I tried to send a sine signal and the receveir works fine.
> > > > How can I do to send only a constant and measure the amplitude?
> > > >
> > > > Thank you for your time.
> > > >
> > > > Simona
> > > >
> > > > _______________________________________________
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> > > > Discuss-gnuradio@gnu.org
> > > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> > >
> > >
> > > --
> > > Sumit Kumar
> > >
> > >
>
>
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