Hi, just a different suggestion - have you tried to determine if there is a frequency offset between the receiving and the sending USRP? I did some tests with the digital/benchmark_?x.py / qpsk code before the recent changes, but for me it worked quite well when I adjusted the center frequency of the transmitter or the receiver by their respective offset, eg:
./benchmark_tx -f 2.40001e9 ... ./benchmark_rx -f 2.4e9 ... To measure the offset, I built simple flowgraph with a constant value as a signal source, which gives just a carrier, which should be (in an ideal world) at the selected center frequency, visible e.g. in usrp_fft.py Hope this helps, Stefan -- Stefan Brüns / Bergstraße 21 / 52062 Aachen mailto:lurch at gmx.li http://www.kawo1.rwth-aachen.de/~lurchi/ phone: +49 241 53809034 mobile: +49 151 50412019 _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
