Re: [Discuss-gnuradio] PSK Real Time Voice Tx/Rx

[Philip Balister]

On 01/13/2014 03:31 PM, Marqo Torres wrote:
> Hello, I am working on a real time voice Tx/Rx using GNU Radio as software
> 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 the
> moment of receiving signal, the audio on the receiver is breaking up, and I
> want the audio sounds good. I thought it might be because of some errors in
> 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 attached
> the flowgraphs of the Tx and Rx side for a better understanding.

Do you see any O/U's from the flowgraphs? If so which flowgraph?

Philip

> 
> I really appreciate your help and I look forward your reply.
> Regards.
> Marqo
> 
> P.S. I've also read that at the moment of involving blocks that work with
> hardware (USRP Sink/Source) I have to skip the Throttle blocks, is that
> true?
> 
> 
> 
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>