Hello, I am working on a real time voice Tx/Rx using GNU Radio as
and a USRP E110. I’m trying to do a QPSK Modulation and I have consulted
several models and forums and it seems everything is okay, however at
moment of receiving signal, the audio on the receiver is breaking up,
want the audio sounds good. I thought it might be because of some errors
synchronism and carrier recovery, so I added the block MPSK Reciever,
without any changes in the audio output. Is anything I am missing? or Is
any calculation or number wrong?
Could it be because of lack in processing? because I’ve tried the same
model with GMSK mod/demod blocks and the voice sounds good. I’ve
the flowgraphs of the Tx and Rx side for a better understanding.
I really appreciate your help and I look forward your reply.
P.S. I’ve also read that at the moment of involving blocks that work
hardware (USRP Sink/Source) I have to skip the Throttle blocks, is that