Hi Mohd,
There are many factors that change the signal as it goes from the DAC to the RF back to the ADC.
So if you need to get the same digital signal back there are a lot of signal manipulation and processing
that needs to be done to reverse the phase, scale and offset that the signal went through.
If this is what you need to do, you might need to do some research to find out how you can make this happen.
Thanks
Charly