Hybrid-and-forward cooperative model based on LDPC coding
Hong Xie · Journal of Central South University(Science and Technology) · 2012
In order to solve the problems of LDPC codes application in relay cooperative system effectively,the hybrid and forward cooperative model based on LDPC codes was proposed.According to amplification forwarding(AF) and decode forward(DF) characteristics,when the channel state is bad,the relay uses decode amplification forward mode;and when the relay correctly decodes completely,the relay switches to decode forward mode.Moreover,extending the coherence among the symbols of the LDPC code words,sending different parts of them by different users,and using LDPC sum product decode algorithm,the scheme can obtain diversity gain and coding gain.Simulation results show that performance of LDPC codes cooperative model based on the hybrid-and-forward is superior to other model.