【摘要】 为了进一步提高LDPC码的性能,利用外在信息度(EMD)能准确表示环外节点的情况,构造了优化的LDPC码。同时,对构造过程中出现连通性较差的短环,采用破环(Cyc le Removal)操作来改善二部图局部的连通性。实验结果证明:在码长、码率和度分布相同的情况下,它较好的提高了码的性能。更多还原

【Abstract】 In order to improve the performance of LDPC code,an optimized LDPC code was constructed by calculating extrinsic message degree of the cycle.This algorithm can remove the short cycle,which is produced unavoidably in constructing LDPC codes,to improve a bipartite graph local connectivity.Experimental results show that the algorithm is better to improve LDPC codes’ performance in the same code length,code rate and the degree distribution.更多还原