AR4JA coding based Coded Cooperative protocols with Network coding in Mobile Satellite Communication System

In order to improve the communication quality of mobile satellite communication system users, CC model based on AR4JA code is proposed in the paper. The advantage of the model is that CC model can provide spatial diversity gain, and AR4JA code is a kind of LDPC code that can provide great code gain with simple encoding structure. And a further modified model called CCAF model which is combined with amplification forwarding protocol is also proposed in the paper. It is founded to cope with the problem of unbalance fading degree between user’s uplink and relay node’s uplink in mobile satellite communication system. Furthermore to improve the system’s throughputs, NC-AR4JA model is proposed, which apply both network code and AR4JA code. Through simulation and discussion, the conclusion is that the BER performances of the CC model and CCAF model proposed in the paper are both much better than no cooperation communication system, and the NC-AR4JA model can improve throughput of the system no matter what the channel condition like.