基于稀疏校验的DVB-S2标准LDPC码快速识别  

Fast Recognition of DVB-S2 LDPC Codes Based on Sparse Check

作　　者：解辉 姚智刚 陈冠一 尹园威 吕萌 XIE Hui;YAO Zhigang;CHEN Guanyi;YIN Yuanwei;LYU Meng(Department of Electronic and Optics Engineering,Army Engineering University Shijiazhuang Campus,Shijiazhuang 050003,China)

机构地区：[1]陆军工程大学石家庄校区电子与光学工程系,石家庄050003

出　　处：《电讯技术》2018年第6期690-695,共6页Telecommunication Engineering

摘　　要：针对DVB-S2(Digital Video Broadcasting-Satellite 2)标准低密度奇偶校验(LDPC)码的识别问题,提出了基于稀疏校验的快速识别方法。基于LDPC码编码矩阵的稀疏性,只有少量校验位和信息位有校验关系,因此只需要对少量的信息位进行校验即可。遍历不同的生成矩阵,并对多个码字的校验结果进行累积,通过对其校验累积量的分布特点实现不同码率LDPC码的识别。由于只采用了很少的信息位进行校验,因此算法计算量小,同时可以有效减少误码带来的影响。仿真结果表明所提算法有效且可以适应15%以上的误码,完全可以满足实际系统对LDPC码的检测需求。For the recognition of Digital Video Broadcasting-Satellite 2（DVB-S2） Low-Density Parity –Check（LDPC） codes,a fast recognition algorithm based on sparse check is proposed. Based on the sparse coding matrix,only a few of check codes and information codes have check relations,so the algorithm only needs a few codes.Different coding matrixes are traversed,and the cumulant of the check result is calculated.The LDPC codes can be recognized according to the distribution characteristics of the cumulant.Because only a few codes are needed,the algorithm has less amount of calculation,and can overcome the impact of error codes.Simulation result proves the effectiveness of the algorithm with tolerance of above 15% error codes and it can fully meet the detection requirements of the actual system on LDPC codes.

关 键 词：DVB-S2 LDPC码 快速识别 稀疏校验 

分 类 号：TN911.22[电子电信—通信与信息系统]