[Discuss-gnuradio] Benchmark-rx/tx.py with QPSK modulation

[Boris Danev]

Hi everyone,

I want to ask if someone has tried the benchmark-rx.py/bencmark-tx.py 
(gnuradio-examples/python/digital) in the the 3.1.3 realease with qpsk 
modulation (-m dqpsk) for transfering user data? I connected 2 usrps 
with an RF cable and two laptops (gnuradio 3.1.3 release).
Using gmsk and dbpsk modulation seem to work more or less, even though 
the receiver sometimes misses sent packets. However the dqpsk modulation 
did not work at all. I am always getting garbage in the payload and ok = 
false for the received packets if any. Also, many sent packets were not 
received at all.

Any comments or suggestions will be appreciated. Thank you in advance.

Boris