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Re: PSK-Demodulation

From: Marcus Müller
Subject: Re: PSK-Demodulation
Date: Sun, 16 Feb 2020 19:12:13 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2

Hi Till,

both symbol sync and CMA equalizer in the same flowgraph at 50 MS/s can
be quite a load on the CPU. As first step, make sure UHD is not printing
"U" or "O"s on your console.
Other than that, not quite sure what you mean with "the change
phaseshifter alternately hange"; could you elaborate?
Also, the "PSK Demod" is in the Deprecated category for a reason: it
randomly breaks. Don't use it, can't help you if you do :)

Best regards,

On 16.02.20 18:50, "Till Hülder" wrote:
> Hello,
> i send frequency chrip signal with an usrp over a phaseshifter and
> modulat with that an 2-PSK the signal, recieve the modulated signal in
> the same usrp and anlayse it.
> The change phaseshifter alternately hange between 0° and 180°. But i
> don't get accurate results after demodulation. I attached my graph ,
> time diagramm and constallation diagramm (on top the RX and bottom TX).
> Can someone help me ?
> Best regards,
> Till

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