| 围长为8的QC-LDPC码的显式构造及其在CRT方法中的应用 |
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| 引用本文： | 张国华,王新梅. 围长为8的QC-LDPC码的显式构造及其在CRT方法中的应用[J]. 通信学报, 2012, 0(3): 171-176 |
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| 作者姓名： | 张国华 王新梅 |
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| 作者单位： | 西安电子科技大学综合业务网理论及关键技术国家重点实验室 |
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| 基金项目： | 国家重点基础研究发展计划(“973”计划)基金资助项目(2010CB328300);国家自然科学基金资助项目(61001131,61101148,61001130);高等学校学科创新引智计划(111项目)基金资助项目(B08038)~~ |
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| 摘 要： | 对于任意码长PL(P≥3L2/4+L 1),利用完全确定的方式构造出一类围长为8的(4,L)QC-LDPC码。将这类码作为分量码,结合中国剩余定理(CRT)构造出一类围长至少为8且码长非常灵活的合成QC-LDPC码。在1/2码率和中等码长条件下的仿真结果表明,这种合成码在AWGN信道下具有优异的性能。
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| 关 键 词： | 准循环低密度奇偶校验码 围长 显式构造 中国剩余定理 |
Explicit construction of girth-eight QC-LDPC codes and its application in CRT method |
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| ZHANG Guo-hua,SUN Rong,WANG Xin-mei. Explicit construction of girth-eight QC-LDPC codes and its application in CRT method[J]. Journal on Communications, 2012, 0(3): 171-176 |
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| Authors: | ZHANG Guo-hua SUN Rong WANG Xin-mei |
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| Affiliation: | (State Key Laboratory of Integrated Service Networks,Xidian University,Xi’an 710071,China) |
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| Abstract: | For arbitrary code lengths of the form PL(P≥3L2/4+L?1),a new family of(4,L)-regular quasi-cyclic(QC) low-density parity-check(LDPC) codes was proposed explicitly with girth eight.Employing the new code as a compo-nent code in the construction method of Chinese remainder theorem(CRT),a novel class of compound QC-LDPC codes was presented with both girth at least eight and very flexible code lengths.Simulation results show that the new compound codes with rate 1/2 and moderate code lengths perform very well over the additive white Gaussian noise(AWGN) channel. |
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| Keywords: | QC-LDPC code girth explicit construction Chinese remainder theorem(CRT) |
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