I have encountered a problem which I have tried to solve for a long time but eventually failed.
I think that it is due to my lack of knowledge for signal processing.
I have used a single Adalm Pluto module as a Transceiver and two of them as a Receiver and a Transmitter.
I am working within Simulink under Ubuntu.
As for the learning process - I have tried to launch examples for QPSK in Communication Toolbox Simulink.
In both cases I do not see the parcel as it is described in the Receiver QPSK example. If I comment both the Pluto Tr module and Pluto Rx module and than connect QPSK transmitter with QPSK Receiver, I do see a good picture on the Constelation Diagram and I do see all messages as they should be (Hello World 000, Hello World 001 etc). When I am using Pluto modules - I am not getting anything at all, and I see garbage on the constelation diagrams (I do see that something is going on there but it looks bad).
Could anyone help me with this please?
I have tried to change Pluto Modules parameters but I did not help.