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 <t...@trondeau.com> > On Wed, Apr 18, 2012 at 11:32 AM, Vivian Paola Triana Galeano > <motis1232...@gmail.com> 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 <ecand...@dee.ufcg.edu.br> > >> > >> 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 <motis1232...@gmail.com>: > >> > > >> > 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 > >> > Discuss-gnuradio@gnu.org > >> > 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 > > Discuss-gnuradio@gnu.org > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > >
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