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DOI:
工程科学与技术:2007,39(5):159-163
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IRA码结构优化与高斯逼近分析
(1.民航飞行技术与飞行安全科研基地, 四川 广汉 618307;2.国防科技大学 电子科学与工程学院,湖南 长沙 410073)
Analysis for Gaussian Approximation and Structure Optimization of IRA Codes
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投稿时间:2007-01-31    
中文摘要: 码结构是决定IRA码性能的重要因素,因此利用高斯逼近对IRA码结构进行了优化。介绍了IRA码的图模型理论,给出了IRA码的Tanner图结构。分析了度为2 的变量节点对码结构的影响。在AWGN信道下,基于给定的噪声方差,对IRA码的高斯逼近进行了研究,设计度分布多项式。基于高斯逼近原理设计出IRA码,并进行计算机仿真。仿真结果表明这类码相对于MacKay法构造的LDPC码能带来性能上的提高,并且具有良好的消息收敛特性。
中文关键词: IRA码  Tanner图  高斯逼近  
Abstract:Code structure is an important factor which affects performance of IRA codes. THe structure of IRA codes was optimized based on Gaussian approximation. The graph model theory of IRA codes was introduced, and the Tanner graph was presented. The impact of 2 degree to the structure of codes was analysed. Based on given noise variance, the Gaussian approximation of IRA codes was researched on AWGN channel, and the degree sequences was designed. IRA codes were designed based on Gaussian approximation and simulated by computer. Simulation results showed that the IRA codes have better performance than MacKay LDPC codes, and the convergence of message are well.
文章编号:20070531     中图分类号:    文献标志码:
基金项目:国家自然科学基金民航联合基金资助项目(60572176)
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引用文本:
黎新,傅强,文磊.IRA码结构优化与高斯逼近分析[J].工程科学与技术,2007,39(5):159-163.
.Analysis for Gaussian Approximation and Structure Optimization of IRA Codes[J].Advanced Engineering Sciences,2007,39(5):159-163.