Until you can identify all the baseband modulation types e.g. Bi-phase- M,S,I, the synchronization methods and the entire data protocol such as simple big or small endian+parity or rolling-code with CRC , you must have expertise in cloning, decoding and repeating such signals with the proper carrier , be that RF or IR at some frequency and modulation type. Perhaps after a few years in telecommunication work designing test equipment, you might be able to pull it off. I once had to design a baseband pay-TV scrambler/descrambler to simulator every method used by all satellite and cable TV carriers in the early 80's
Otherwise, you need to hire someone with that experience.