Cooperative relaying technologies based on network coding
Xu Jing · Jisuanji gongcheng yu sheji · 2012
To enhance the performance of network coding in cooperative relaying scenario,a soft-input-soft-output network coding and soft symbol estimate-and-forward(SNC-SEF) scheme is proposed,in which soft channel re-encoding,soft-input-soft-output network coding and soft modulating on the decoded data received from different sources are performed by the relay node.In the proposed scheme,the key point is the soft modulating which is derived based on maximum likelihood criteria.The scheme can both keep soft information to maximum and obtain decoding gain.Simulation results are presented to prove that the proposed SNC-SEF scheme much outperforms the traditional network coding-decode and forward(NC-DF) scheme.