摘要
基于修饰技术提出了一种改进的准循环低密度奇偶校验(QC-LDPC)码的构造方法。该方法构造的QC-LDPC码具有较低的编码复杂度,其校验矩阵围长至少为6,避免了四环的出现,具有良好的围长特性。仿真分析表明:通过该构造方法构造的码率为93.7%的QC-LDPC(3969,3717)码在降低其编码复杂度的情况下,拥有与其对应的未应用修饰技术的QC-LDPC(3969,3719)码相媲美的纠错性能;并且在相同条件下,QC-LDPC(3969,3717)码的纠错性能要好于利用随机构造方法构造的PEG-LDPC(3969,3720)码,以及ITU-T G.975中已广泛用于光通信系统中的RS(255,239)码和LDPC(32640,30592)码,更适合于光通信系统。
An improved construction method of quasi-cyclic low-density parity-check(QCLDPC)codes,based on the making technology is presented.The QC-LDPC codes constructed by this improved construction method have lower encoding complexity,and their parity-check matrices can effectively avoid the girth-4phenomena and have the advantages such as better girthlength properties and more flexible adjustment in the code-length code-rate.The simulation results show that the error-correction performance of the QC-LDPC(3969,3717)with the coderate of 93.7%constructed by this improved construction method is as good as the error-correction performance of the QC-LDPC(3969,3719)code which is constructed without the making technology.Furthermore,at the same simulation conditions,the error-correction performance of the QC-LDPC(3969,3717)is better than that of the PEG-LDPC(3969,3720)code constructed by the random construction method,the classic RS(255,239)code which is widely used in optical communication systems and the LDPC(32640,30592)code in ITU-T G.975.1.Therefore,it is more suitable for optical communication systems.
出处
《半导体光电》
CAS
北大核心
2016年第2期248-251,共4页
Semiconductor Optoelectronics
基金
国家自然科学基金项目(61472464)
重庆市基础与前沿研究计划项目(cstc2015jcyjA0554
cstc2013jcyjA40017)
重庆邮电大学(重庆市)研究生科研创新项目(CYS14144)