Aw: Re: PSK-Demodulation

[Till Hülder]

 Hi Marcus,
 
 i do get an U as an output from the UHD . What can i do against this and
 what did this mean?
 My phaseshifter switch between 0° and 180° all time. I want to check if
 it is possible to implement a 2-PSK.
 What can i use instead of PSK Demod?
 
 Best regards,
 Till

 

 

Gesendet: Sonntag, 16. Februar 2020 um 19:12 Uhr
Von: "Marcus Müller" <address@hidden>
An: address@hidden
Betreff: Re: PSK-Demodulation

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,
Marcus


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
>
>  
>
>