Hi Logan, Can you give more detail on your synchronization choices for BPSK so we can tell you what more you may need to do?
Rich Sent from my iPhone > On Sep 30, 2015, at 7:14 PM, Washbourne, Logan > <lwas...@ostatemail.okstate.edu> wrote: > > Hello, > > This is somewhat of an update to a previous post I made from last week. After > talking to Julian and Martin, it was made clear to me that I needed to use a > correlation system to insure my receiver would be synced up to my transmitter > when trying to communicate over the air. > > I am trying to utilize the Correlation Estimator block to help me achieve > those means. In order to ease myself into it, I am trying to turn the > test_corr_est.grc example into an over the air program. I am getting > communication between the transmitter and receiver(essentially I just split > the grc program in two and took out the throttle block and the channel model > and replaced them with UHD blocks). Now, I don't get any O's or L's or an > abundance of U's, and I can clearly see data coming in on the RX side, but it > seems to be a lot of noise, but noise generated by the TX side, because it > goes away when I stop transmitting. The center frequency is 2.48GHz and the > sample rate is 250k samples/sec. > > My testing method is plotting the constellation symbols right before they get > sent out on the TX side and then plotting them right after the UHD block on > the RX side. It is only bpsk and the symbols are covering all four quadrants. > > I haven't changed any settings on the polyphase clock sync or the modulation > scheme. > > This is a little rambly but I appreciate your time, > > Logan Washbourne > Electrical Engineering Graduate Student > (Electromagnetics) > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
