Hello Vivian, I have also had this problem, but I haven't being able to solve it. Could you please let me know if your able to solve it? I would greatly appreciate your help.
Sam On Thu, Apr 19, 2012 at 7:41 AM, Vivian Paola Triana Galeano < [email protected]> wrote: > I'm using non-differential modulation. But I used differential before and > it didn't work neither. I think my problem is with the sample rate that I > have to set in UHD_USRP Sink and Source Blocks. I try to send a wav file > that has maximum frequency of 12kHz so I set the sample rate at 28kHz, > however it didn't. I need understand what the sample rate refers to. > > Thansks in advance for helping me! > > > > 2012/4/19 Tom Rondeau <[email protected]> > >> On Wed, Apr 18, 2012 at 11:32 AM, Vivian Paola Triana Galeano >> <[email protected]> wrote: >> > I'm working with USRP1 daughterboard RFX 2400 MHz. >> > The configuration of the parameter in UHD_USRP block is sample rate= >> 1MHz >> > Center freq=2.4GHz. >> >> Vivian, >> Are you using differential or non-differential modulation? Over the >> air, the phase ambiguity at the receiver does not get worked out, so >> it will only work if you use differentially encoded symbols. >> >> Tom >> >> >> > 2012/4/18 Edmar Candeia Gurjao <[email protected]> >> >> >> >> Hi Vivian, >> >> >> >> give us details about your set up, like what USRP you are using, >> >> daughterboads and frequency of transmission, >> >> >> >> Edmar >> >> >> >> 2012/4/18 Vivian Paola Triana Galeano <[email protected]>: >> >> > >> >> > I think my problem has something to do with the parameters of the >> USRP. >> >> > >> >> > I try to send a file modulated with BPSK. So I build a graph like >> this >> >> > : >> >> > >> >> > File source -> Packet Encoder -> PBSK MOD -> PBSK DEMOD -> Packet >> >> > Decoder -> >> >> > File sink >> >> > >> >> > >> >> > >> >> > and i really get the correct output file with thee right >> constellation. >> >> > >> >> > If I put a USRP source and USRP sink into graph, I don't receive >> >> > anything. >> >> > I hope anyone can help me. Thanks >> >> > >> >> > >> >> > _______________________________________________ >> >> > Discuss-gnuradio mailing list >> >> > [email protected] >> >> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> >> > >> >> >> >> >> >> >> >> -- >> >> --------------- >> >> Edmar Candeia Gurjão >> >> Universidade Federal de Campina Grande. >> >> 1 574 387 0195 >> >> http://ecandeia.dee.ufcg.edu.br >> > >> > >> > >> > _______________________________________________ >> > Discuss-gnuradio mailing list >> > [email protected] >> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> > >> > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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