[Discuss-gnuradio] QPSK in benchmark

[yeran]

Hi everyone,

I'm using gnu radio benchmark to do experiment. I want to test under different modulation, BPSK, DBPSK, DQPSK all works well, but there seems to be some problem in QPSK. I also asked some lab mates, they also face this problem. 

Anyone come across this problem, how did you deal with it?

Thanks in advance!

Ada