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Re: [Discuss-gnuradio] PSK Real Time Voice Tx/Rx
From: |
Philip Balister |
Subject: |
Re: [Discuss-gnuradio] PSK Real Time Voice Tx/Rx |
Date: |
Mon, 13 Jan 2014 18:17:02 -0500 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130625 Thunderbird/17.0.7 |
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?
>
>
>
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