| 一种可快速编码的QC-LDPC码构造新方法 |
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| 引用本文： | 刘原华,张美玲.一种可快速编码的QC-LDPC码构造新方法[J].电讯技术,2013,53(1):55-59. |
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| 作者姓名： | 刘原华 张美玲 |
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| 作者单位： | 西安邮电大学通信与信息工程学院 |
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| 基金项目： | 国家自然科学基金资助项目(61001131，61201194，61172071)；陕西省教育厅专项科研计划项目（11JK1007）；西安邮电大学青年教师基金项目（0001286） |
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| 摘 要： | 为解决LDPC码的编码复杂度问题,使其更易于硬件实现,提出了一种可快速编码的准循环LDPC码构造方法。该方法以基于循环置换矩阵的准循环LDPC码为基础,通过适当的打孔和行置换操作,使构造码的校验矩阵具有准双对角线结构,可利用校验矩阵直接进行快速编码,有效降低了LDPC码的编码复杂度。仿真结果表明,与IEEE 802.16e中的LDPC码相比,新方法构造的LDPC码在低编码复杂度的基础上获得了更好的纠错性能。
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| 关 键 词： | 低密度奇偶校验码 准循环 循环置换矩阵 快速编码 |
A new design method for quasi-cyclic LDPC codes with fast encoding ability |
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| LIU Yuan-hua and ZHANG Mei-ling.A new design method for quasi-cyclic LDPC codes with fast encoding ability[J].Telecommunication Engineering,2013,53(1):55-59. |
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| Authors: | LIU Yuan-hua and ZHANG Mei-ling |
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| Affiliation: | (School of Communication and Information Engineering,Xi′an University of Posts and Telecommunications,Xi′an 710121,China) |
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| Abstract: | A new design of quasi cyclic (QC) LDPC codes with easier hardware implementatio
n is proposed to lower the encoding complexity. Based on the QC LDPC codes with
circulant permutation matrices, the masking method and line permutations are ut
ilized to make the parity check matrix have the quasi dual diagonal structure, and the fast encoding algorithm directly from the parity check matrix can reduce the encoding complexity effectively. Simulation results show that compared with the QC LDPC codes from the IEEE 802.16e standard, the constructed codes have better performance while maintaining the low encoding
complexity. |
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| Keywords: | low density parity check codes quasi cyclic circulant permutation matrix fast encoding |
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