Simulated DBPSK mod/demod

[Andrew J Wolfram]

Hi All,

I'm trying to simulate DBPSK modulation and demodulation in GNU Radio 3.8, but my output is not the same as my input, so I must be doing something wrong. Please see the attached flow graph. My input is a repeating vector (1, 0), but my output is always (0, 0, 1, 0, 0, 0, 0, 1) or some shifted version of that. Where am I going wrong?

Thanks,

Andrew

constellation_problems.grc
Description: application/gnuradio-grc

constellation_problems.png
Description: PNG image