I just made my first communication in infrared. I am now able to detect a 38 kHz modulation with my receptor. I also began to implement the RCMM protocol (http://www.sbprojects.com/knowledge/ir/rcmm.php). It seems that everybody wants to have is own IR protocol but they are usually simple and the RCMM seems to be best supported by the receptor. You can see the result of some bits encoded with this protocol as they are received by the receptor.
I now need to implement the demodulation of this signal. Which seems to be the hardest part.