采用LDPC码的分布式联合信源信道网络编码  

Distributed joint source channel network coding using LDPC codes

作　　者：路嫣茹 姚建国[1,2] 

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003 [2]南京邮电大学江苏省无线通信重点实验室,江苏南京210003

出　　处：《电视技术》2016年第4期90-95,共6页Video Engineering

摘　　要：提出了采用低密度奇偶校验码的分布式联合信源信道网络编码方案,应用于两源一中继一目的节点的无线传感器网络中。在方案中,信源节点通过传输系统信道码的校验位与部分信息位,同时实现了信源压缩与信道纠错。中继节点有效利用数据的相关性进行译码,并进行部分数据比特删余,减少因中继端网络编码引起的错误传播,仿真验证了方案的有效性。应用了不等差错保护思想,更贴近实际应用场景,利于目的节点进行更好的低误差解码。A distributed joint source channel network coding scheme using low density parity check codes is proposed for a wireless sensor network, in which two correlated source nodes communicating information to one destination node with the help of one relay node. In this scheme, for each source node, both distributed compression and channel error correction are simultaneously achieved by transmitting the parity bits together with a fraction of the information bits of a systematic channel code. The relay node effectively utilizes the correlations in decoding. And deleting operation of some data bits is done, which effectively reduces the error propaga- tion due to network coding. The simulation results show the validity of the proposed scheme. Also, the unequal error protection i- dea is referenced, which is closer to the actual application scenarios, and this helps in low error decoding at destination node.

关 键 词：无线传感器网络 分布式信源编码 网络编码 低密度奇偶校验码 分布式联合信源信道网络编码 不等差错保护 

分 类 号：TN911.2[电子电信—通信与信息系统]