| 非正则LDPC码在AWGN信道中的性能研究 |
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| 引用本文： | 胡维钢,赵振纲,徐晶晶. 非正则LDPC码在AWGN信道中的性能研究[J]. 无线电工程, 2008, 38(3): 25-27 |
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| 作者姓名： | 胡维钢 赵振纲 徐晶晶 |
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| 作者单位： | 北京邮电大学,信息工程学院,北京100876 |
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| 摘 要： | 简单介绍了非正则低密度奇偶校验(Low Density Parity Check,LDPC)码的结构。研究了其对数域概率译码的和积算法(Sum Product Algorithm,SPA),并对该算法的主要公式进行了推导,给出了其迭代核心部分的C语言实现伪码。对一种基于802.16e直接编码法生成的非正则LDPC码在高斯信道下进行了仿真分析,表明中短码长的非正则LDPC码已经具有优异的纠错性能。
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| 关 键 词： | 非正则LDPC码 BP算法 和积算法 误比特率 |
| 文章编号： | 1003-3106(2008)03-0025-03 |
| 修稿时间： | 2007-09-27 |
Performance Study on Irregular Low-density Parity-check Codes on AWGN Channel |
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| HU Wei-gang,ZHAO Zhen-gang,XU Jing-jing. Performance Study on Irregular Low-density Parity-check Codes on AWGN Channel[J]. Radio Engineering of China, 2008, 38(3): 25-27 |
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| Authors: | HU Wei-gang ZHAO Zhen-gang XU Jing-jing |
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| Abstract: | The irregular LDPC (Low Density Parity Check) codes structure is brief ly introduced first in this paper.Then the SPA (Sum-Product Algorithm) in the L OG-Likelihood domain are studied.The main formulas of SPA of irregular LDPC co d es are deduced and the implementation of initial part of SPA under AWGN channel by using pseudo C codes is also presented.One kind of irregular LDPC codes whic h generates by using direct encoding method which is proposed by IEEE 802.16e st andard is simulated and analyzed under AWGN channel.The result shows that the i rregular LDPC codes have excellent error correction capability at moderate or sh ort length. |
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| Keywords: | irregular LDPC codes BP algorithm sum-product algorithm bit error rate |
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