| 一类广义RA码的优化设计方法 |
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| 引用本文： | 史治平,朱南,李少谦.一类广义RA码的优化设计方法[J].电子科技大学学报(社会科学版),2008(4). |
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| 作者姓名： | 史治平 朱南 李少谦 |
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| 作者单位： | 电子科技大学通信抗干扰技术国家级重点实验室; |
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| 基金项目： | 国家自然科学基金(60602008); 国家863计划(2006AA01Z269); 国家973(2007CB310604) |
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| 摘 要： | 由重复器、交织器、组合器和广义累加器组成的广义系统RA码,采用低密度奇偶校验码(LDPC码)的置信传播译码时,码性能受稀疏校验矩阵的小环影响大,而稀疏校验矩阵由编码器的结构决定。该文根据置信传播译码的无环要求,通过重复器、交织器、组合器和广义累加器的联合优化设计,给出了无4环的广义RA码的奇偶校验矩阵设计方法。研究结果显示,该方法实现简单,实用性强,设计的广义RA码编码增益大。
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| 关 键 词： | 置信传播译码 LDPC码 奇偶校验矩阵 RA码 Turbo码 |
Optimization Design of a Class of Generalized RA Codes |
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| SHI Zhi-ping,ZHU Nan, LI Shao-qian.Optimization Design of a Class of Generalized RA Codes[J].Journal of University of Electronic Science and Technology of China(Social Sciences Edition),2008(4). |
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| Authors: | SHI Zhi-ping ZHU Nan LI Shao-qian |
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| Institution: | SHI Zhi-ping1,2,ZHU Nan1,, LI Shao-qian1 (1. National Key Laboratory of Communications,University of Electronic Science , Technology of China Chengdu 610054,2. National Mobile Communications Research Laboratory,Southeast University Nanjing 210096) |
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| Abstract: | The systematic generalized repeat-accumulate (GRA) code is constituted by a repeater, an interleaver, a combiner and a generalized accumulator. Under the belief propagation (BP) decoding of low density parity check (LDPC) codes, the performance of the GRA codes be affected by small cycles of the sparse parity check matrix which depends on encoding method. In this paper we present an optimized method for a class of GRA codes design. The parity check matrix is constructed based on the joint design between int... |
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| Keywords: | belief propagation decoding LDPC codes parity check matrix RA codes Turbo codes |
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