Arduino controlled RF decoder

Hi

I have a pair of encoded Transmitter and decoded Receiver with learning mode.

The idea is that I want to use arduino to transmit simulated encoded signal to the receiver.

In fact, I have searched it and still cannot find satisfactory solution.

Has anybody ever done such project or encounter any reference link?

RF frequency should be 315Mhz.

Thanks advance.

You still need an RF transmitter at 315MHz with the same modulation as the receiver. Then the arduino can send to the transmitter any kind of data with encoding.