摘要
研究了三种结构的循环移位置换矩阵,分别称为定义在GF(2)有限域上的I矩阵、D矩阵和Q矩阵,讨论了这些置换矩阵的结构特征和性质,主要研究了D和Q矩阵对基于单位矩阵I的规则QC-LDPC码和IEEE802.16e标准草案中推荐的不规则QC-LDPC码性能的改进.该文的另一个贡献是以Q矩阵为分块矩阵,构造了S-LDPC码新码族.S-LDPC码在性能和编码计算复杂度方面都略优于IEEE标准中的不规则QC-LDPC码.
The authors investigate three kinds of circulant-shift permutation matrices, which are called I （identity matrix）, D and Q matrices, and discuss their structural characteristics and sev- eral properties in this paper. Computer simulating tests show that D and Q matrices can improve performance of the regular QC-LDPC codes based on identity matrix, including irregular QC-LD- PC codes in IEEE 802.16e standard draft. The other contribution in the paper is designing the new family of S-LDPC codes by using Q matrix as partitioned matrices of H-matrix, which have the advantage of irregular QC-LDPC codes presented in IEEEE 802.16e standard draft in performance and calculating complexity.
出处
《计算机学报》
EI
CSCD
北大核心
2008年第5期783-792,共10页
Chinese Journal of Computers
