摘要
利用GRS(generalized reed-solomon)码的生成多项式提出了基于改进的2-D GRS(two-dimensional GRS)码设计和构造QC-LDPC(quasi-cyclic low density parity-check)码的方法,使所构造的码具有较好的译码性能。同时在码的构造过程中,考虑到了准双对角线结构和合适的度分布。不同码率的LDPC码用于和新设计的QC-LDPC码进行测试和比较。实验结果表明,所提出的码构造方法可加快LDPC码校验矩阵的构造,同时基于所提出方法构造的QC-LDPC码可提高译码性能,并降低编码复杂度。
The construction method for QC-LDPC（quasi-cyclic low density parity-check） code with modified two-dimensional generalized reed-solomon（2-D GRS） code is proposed using the generator polynomial of GRS code, so thus the constructed code can have better decoding performance. Meanwhile both the quasi dual-diagonal structure and proper weight distributions are considered during the construction. The QC-LDPC codes with different rates are used to compare with the new designed codes. Experimental results show that the proposed method can accelerate the construction and QC-LDPC codes constructed from the proposed method can have better decoding performance while with low encoding complexity.
出处
《通信学报》
EI
CSCD
北大核心
2015年第2期193-199,共7页
Journal on Communications
基金
中国国家地面数字电视研究工程应用基金资助项目~~
