| 基于改进PEG算法的多元RA码交织器设计 |
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| 引用本文： | 文武,肖而靖,朱联祥.基于改进PEG算法的多元RA码交织器设计[J].重庆邮电学院学报(自然科学版),2010(2). |
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| 作者姓名： | 文武 肖而靖 朱联祥 |
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| 作者单位： | 重庆信科设计有限公司;重庆邮电大学通信新技术应用研究所;重庆邮电大学信号与信息处理重点实验室; |
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| 基金项目： | 重庆市科委自然科学基金项目(2008BB2087);;重庆市教委自然科学基金项目(KJ080502);;重庆邮电大学博士启动项目(A2007-56)~~ |
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| 摘 要： | 在理想度分布的条件下,交织器是重复累积(repeat accumulate,RA)码性能优异的关键因素。在设计交织器时,应该避免短环的存在,特别是环4,而渐进边增长(progressive edge growth,PEG)算法是一种简单有效的避免短环的构造法。将PEG算法运用到q元RA(q-RA)码交织器的设计,首先构造出无4环的校验矩阵,通过校验矩阵得到对应的q-RA码交织器。仿真了q-RA码采用设计的交织器和随机交织器时的性能,得到采用改进的PEG算法构造交织器的q-RA码性能优于采用随机交织器的码,且对于高码率的q-RA码,其性能改善更加明显。
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| 关 键 词： | 重复累积码（repeat accumulate codes RA） 多元规则重复累积码（q-RA码） 校验矩阵 交织器 |
Interleaver design for q-ary regular RA codes based on improved PEG algorithm |
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| WEN Wu ,XIAO Er-jing,ZHU Lian-xiang.Interleaver design for q-ary regular RA codes based on improved PEG algorithm[J].Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition),2010(2). |
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| Authors: | WEN Wu XIAO Er-jing ZHU Lian-xiang |
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| Institution: | 1.Chongqing Information Technology Designing Company;Chongqing 400065;P.R.China;2.New Communications TechnologiesApplied Research Institution;Chongqing University of Posts and Telecommunications;3.Key Laboratory of Signal and Information Processing;P.R.China |
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| Abstract: | In an ideal degree distribution,the interleaver is a key factor for the performance of repeat-accumulate(RA)codes.The short cycles,especially cycles of length 4,must be avoided in interleaver design.And progressive edge growth(PEG)algorithm is a simple and effective method to avoid the short cycles.In this paper,improved PEG algorithms were used for the construction of parity-check matrix of q-ary regular RA codes without length 4-cycles firstly,and then the interleaver design of the codes was gained.Experi... |
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| Keywords: | repeat accumulate code q-ary regular repeat accumulate code parity-check matrix interleaver |
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