Hi, I don't think it is the problem of channel since your channel is symmetric. Perhaps you could check your parameters first and list the commands you used to the mailing list. Usually I use benchmark in /gr-digital/examples/ofdm and it works well.
BTW, your gmail account is some kind of cool ... -- Yang, Qing Information Engineering, CUHK 2012/9/7 usrp n210 <usrpn...@gmail.com> > I am using 3 USRPs (USRP N210 ). > I run example program "benchmark_rx.py " and "benchmark_tx.py " in > /gr-digital/examples/narrowband/. > I performed experiment on 2 USRP's(A,B) at a time. > so A-B and B-A 2 channels for 2 USRP. > when I send packets from A-B "psk" modulation scheme gives best(171/171)* > performance while same is not true for B-A(171/0)*. > while "gfsk" scheme gives good performance from B-A(171/171)*. > Can anybody knows why different modulation scheme gives different result > on different channel ? > Is it related to USRP synchronization ? > Can we perform packet level debugging in USRP ? > How can we find the cause of this problem ? > Or is it implementation related bug in GNU-radio? > * : (n_rcvd/n_right) n_rcvd => received packet,n_right => correct received > packet > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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