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! >
