| 低复杂度非规则LDPC码的构造方法 |
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| 引用本文： | 陈其先,沈良,程云鹏.低复杂度非规则LDPC码的构造方法[J].军事通信技术,2009(2). |
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| 作者姓名： | 陈其先 沈良 程云鹏 |
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| 作者单位： | 解放军理工大学通信工程学院研究生1队;解放军理工大学通信工程学院无线通信系; |
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| 摘 要： | 较高的编码复杂度成为非规则LDPC码应用的一个难点。文章从实际应用的角度出发,针对中长码提出了两种低复杂度的非规则LDPC码的构造方法:改进的B IBD和ALDPC,大大降低了编码复杂度。仿真结果表明,构造出的码字比传统的PEG构造方法有一定的性能改善。最后,从非规则码的EX IT图出发,分析了两种构造码子性能的差异。
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| 关 键 词： | 非规则低密度校验码 均衡不完全区组设计 行列式低密度校验码 外部信息图 |
Low Complexity Construction for Irregular LDPC Codes |
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| CHEN Qi-xian,SHEN Liang,CHENG Yun-peng.Low Complexity Construction for Irregular LDPC Codes[J].Journal of Military Communications Technology,2009(2). |
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| Authors: | CHEN Qi-xian SHEN Liang CHENG Yun-peng |
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| Institution: | CHEN Qi-xian1,SHEN Liang2,CHENG Yun-peng2(1.Postgraduate Team 1 ICE,PLAUST,Nanjing 210007,China,2.Department of Radio Communication ICE,PLAUST) |
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| Abstract: | It's difficult to put irregular LDPC into practice because of its higher encoding complexity.Two kinds of low complexity construction for irregular LDPC were proposed.They are the improved BIBD and the modified Array LDPC with lower encoding complexity.Computer simulation shows that the proposed constructions achieve better performance than the conventional PEG construction.Finally,the performance differences between the two constructions using irregular EXIT chart were analyzed. |
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| Keywords: | irregular LDPC BIBD array LDPC EXIT chart |
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