联合LDPC码和网络编码的协作通信技术  

Joint LDPC codes and network coding cooperative communication technology

作　　者：朱联祥[1] 行彦辉[1] 李祥[1] 代改荣[1] 王朝璋[1] 

机构地区：[1]重庆邮电大学信号与信息处理重庆市重点实验室,重庆400065

出　　处：《重庆邮电大学学报（自然科学版）》2011年第3期262-265,共4页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：信号与信息处理重庆市市级重点实验室建设项目(CSTC;2009CA2003);重庆市科委自然科学基金项目(2008BB2087);重庆市教委自然科学基金项目(KJ080502)~~

摘　　要：结合信道编码和网络编码的思想,提出了一种在两用户协作情况下联合LDPC(low-density parity-check)码和网络编码的协作分集方案,该方案在接收端通过基于整体H矩阵的置信传播算法实现LDPC码和网络编码的联合译码,并对该方案在瑞利慢衰落信道下的性能进行了MATLAB仿真。仿真结果表明:与编码协作和不协作方案相比,所提方案在系统误码率性能上有着明显地改善。Combining the idea of channel coding and network coding,a joint LDPC codes and network coding cooperative diversity scheme in the scenarios of two-user collaboration is proposed in this paper.The joint decoding of LDPC codes and network coding is implemented by using belief propagation algorithm on its overall H matrix in the receiver.The bit error rate performance of the system in Rayleigh slow fading channel was verified through MATLAB simulation,which shows a significant improvement of the proposed scheme over the non collaboration and coding cooperation systems.

关 键 词：网络编码 协作分集 低密度校验码(LDPC) 联合译码 

分 类 号：TN921[电子电信—通信与信息系统]