How to connect arduino uno + rf transmitter344Mhz to rf reveiver+ ardupilot 2.6

Hello
I am new here.
I am working on quadcopter (apm2.5)
On the transmitting end, I want to use RF transmitter+arduino uno
but the problem is at receiving end, i want to sent signal to ardu pilot through RF receiver
Please help me if any body know how to do it.
Baqar Bilal

I suppose it's going to depend what RF receiver you're using, to start with.