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) < muel...@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 <ssib...@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 < > sumits...@gmail.com> ha scritto: > > > > Hi Simona, what is the "constant signal" here ? > > > > > > > > On Tue, 16 Jul 2019 at 17:54, Simona Sibio <ssib...@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 > > > > > > > > > > _______________________________________________ > > > > > Discuss-gnuradio mailing list > > > > > Discuss-gnuradio@gnu.org > > > > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > > > > > > > > -- > > > > Sumit Kumar > > > > > > > > > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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