移动通信2024，Vol.48Issue(5)：27-31,5.DOI:10.3969/j.issn.1006-1010.20240430-0002
基于双序列反序的(4,L)规则girth-8 QC-LDPC短码
(4,L)Regular Girth-8 QC-LDPC Short Codes Based on Reversal of Dual Sequences
摘要
Abstract
The explicit construction of short-length quasi-cyclic(QC)low-density parity-check(LDPC)codes with larger girth is of critical importance for both theoretical research and practical applications in QC-LDPC codes.Initially,a greedy search algorithm based on a pairing strategy is introduced,and empirical results at column weight J equal to 4 guides the formulation of an exponent matrix characterized by dual-sequence reordering.Subsequent analysis demonstrates that this exponent matrix corresponds to QC-LDPC codes with a girth of 8 for any row weight L.Compared to existing explicit construction methods,specifically the greatest-common-divisor method,the proposed QC-LDPC codes significantly reduce the code length.Finally,techniques involving the segmentation and concatenation of the exponent matrix,combined with masking procedures,are employed to design composite codes.These codes exhibit decoding performance surpassing 5G NR LDPC codes in high signal-to-noise ratio regions.关键词
低密度奇偶校验码/准循环/环路/反序/5GNRKey words
low-density parity-check codes/quasi-cyclic/girth/sequence reversal/5G NR分类
电子信息工程引用本文复制引用
张国华,佘佳钰,周渊..基于双序列反序的(4,L)规则girth-8 QC-LDPC短码[J].移动通信,2024,48(5):27-31,5.基金项目
国家自然科学基金委员会(面上项目)"基于空间耦合码的比特交织编码调制迭代检测系统研究"(62071131) （面上项目）
