On 17.07.2015 12:43, Bill Eaton wrote: > From Martin Braun: > >>My preference is to build the demod/sync chain with it's own blocks, and then >>just output the complex symbols > >> into either an X/Y plot (WX) or the QT Constellation Sink > > Even an X/Y plot ends up looking funny. I’ve attached a GRC file for > X-Y, and when you turn on persistence, it looks better. But it’s very > strange. Maybe my bits_per_symbol is wrong. Or maybe the sample rate for > the X-Y chart should be different than the random sample rate? Here’s > the 4 QAM X-Y.
Your plot looks fine, it's just oversampled (but perfectly time-synchronized, I'm guessing this is post-pulse shaping + noise?). What I meant was that you plot the result of your timing + phase recovery into an XY plot, that would take care of those additional points you're seeing. M _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio