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Girth-8(3,L)-规则QC-LDPC码的一种确定性构造方法 被引量:10

Girth-8 (3,L)-Regular QC-LDPC Codes Based on Novel Deterministic Design Technique
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摘要 对于围长(girth)至少为8的低密度奇偶校验(LDPC)码,目前的绝大多数构造方法都需要借助于计算机搜索。受贪婪构造算法启发,该文利用完全确定的方式构造出一类围长为8的(3,L)-规则QC-LDPC码。这类QC-LDPC码的校验矩阵由3×L个P×P的循环置换矩阵构成。对于任意整数P≥3L2/4,这类校验矩阵的围长均为8。 Most of the proposed constructions for Low-Density Parity-Check (LDPC) codes with girth at least eight are focused on (semi-) stochastic methods with the aid of computer search. Motivated by the resulting parity-check matrices obtained from the Greedy construction idea, a deterministic method is presented to construct a novel family of girth-8 (3,L)-regular Quasi-Cyclic (QC-) LDPC codes. The parity-check matrix of the new code consists of 3 × LP × Pcyclic permutation matrices and the girth of its Tanner graph is eight for arbitrary integer P ≥ 3L^2/ 4.
出处 《电子与信息学报》 EI CSCD 北大核心 2010年第5期1152-1156,共5页 Journal of Electronics & Information Technology
基金 国家973计划项目(2010CB328300) 国家自然科学基金(U0635003) 111基地项目(B08038)资助课题
关键词 低密度奇偶校验码 准循环 围长 Low-Density Parity-Check (LDPC) code Quasi-Cyclic (QC) Girth
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共引文献10

同被引文献91

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