Help For Packet Reception in GNU Radio

Hello, 

I am  doing Packet Transmission and Reception using Adalm Pluto SDR in GNu radio companion. I am transmitting text file(.txt file with one sentence ) using one adalm pluto and receiving it   using 2nd adalm pluto. But while receiving  there is much more noise and I can't properly receive the packet that I transmitted. 

Here I am attaching the .grc file and the images of the constellation diagrams.

Please help me to receive the packet successfully

Thank You

Rohith R