Re: the output of the "USRP Source"?

[Marcus Müller]

Hi ????????!

I'm having a really hard time reading your photograph of your screen.
Could you use GNU Radio Companion's built-in Screen Capture functionality to 
give us
better pictures?

https://wiki.gnuradio.org/index.php/FAQ#How_can_I_take_a_picture_of_a_Flow_Graph

Best regards,
Marcus

On 21.05.21 10:23, ???????? wrote:
> Hi!
> I tried to use the "channel model" module to simulate the interference caused 
> by the
> channel. I used the "constellation modulator" to output the QPSK signal, and 
> restored the
> original signal at the receiving end through multiphase clock 
> synchronization, equalizer,
> etc. The performance was very good, but If I use "USRP Sink" and "USRP 
> source" to send and
> receive signals, that is to say, the "channel model" becomes the interference 
> of the
> actual space. When I use the same recovery settings as before, the signal 
> does not
> recover. what should I do?Below is my GRC. .diagram
> 
> Thanks a lot!
>