LDPC码中一种基于节点残余的BP译码算法

BP Decoding Algorithm Based on Nodes Residual for LDPC Code

研究了基于变量节点传递到校验节点的信息残余的LDPC码BP译码(VC-RBP)算法。此算法是一种利用节点间残余信息动态调度的置信传播算法,有着译码速度快、误码率性能优良、复杂度较低的优点。类似于信息残余LDPC码的BP译码(RBP)算法,但在残余信息的计算时有所不同。仿真结果表明,该算法在误码率为10-4、迭代次数为10时优于RBP算法0.28dB。

The Variable to Check Residual Belief Propagation（VC-RBP） for LDPC codes is researched in this paper.It is a dynamic scheduling belief propagation using residuals between nodes,and has some advantages,such as fast decoding,good performance,and low complexity.It is similar to Residual Belief Propagation（RBP）,but has some difference in computing the residual message.Simulating results show that the proposed method is about 0.28 dB better than RBP when BER is 10-4 and the iteration number is 10.