非规则RA码无码率特性分析

doi:10.3969/j.issn.1001-506X.2011.03.37

Journal of Systems Engineering and Electronics ›› 2011, Vol. 33 ›› Issue (3): 654-658.doi: 10.3969/j.issn.1001-506X.2011.03.37

非规则RA码无码率特性分析

孙蓉1，2，刘景伟1，孙岳1，白宝明1

1. 西安电子科技大学ISN国家重点实验室，陕西西安 710071；
2. 东南大学移动通信国家重点实验室，江苏南京 210096

出版日期:2011-03-21 发布日期:2010-01-03

On the rateless character of irregular RA codes

SUN Rong1,2, LIU Jing-wei1, SUN Yue1, BAI Bao-ming1

1. State Key Lab on ISN, Xidian University, Xi’an 710071, China;
2. National Mobile Communications Laboratory, Southeast University, Nanjing 210096, China

Online:2011-03-21 Published:2010-01-03

摘要/Abstract

摘要：

介绍了非规则重复累积(repeataccumulate, RA)码的构成原理，引入了编码线图进行RA码的图模型表示。详细分析了编码中的两种交织策略，并证明了其等价性。通过分析非规则RA码的奇偶校验位的生成过程，证明了非规则RA码的无码率特性。给出了不同码率情况下的系统非规则RA码在二元删除信道性能曲线。通过与LT码的比较，表明非规则RA码是逼近容量限的错误平层性能较低的无码率码。对系统非规则RA码的错误平层进行分析，并给出了降低错误平层的编码修正方法。

Abstract:

his paper introduces the construction of systematic irregular repeat accumulate (IRA) codes. The encoding line is used to describe the graph structure of IRA codes. The two interleaving strategies of IRA codes are analyzed, and it is shown that the two interleaving strategies are equal. The rateless character of IRA codes is also shown. The performances of IRA codes with different rates in binary erasure channels are simulated. Simulation results show that the IRA codes are capacity achieving. The error floor performance of IRA codes is analyzed, and the modified encoding method is presented to lower the error floor.

孙蓉，刘景伟，孙岳，白宝明. 非规则RA码无码率特性分析[J]. Journal of Systems Engineering and Electronics, 2011, 33(3): 654-658.

SUN Rong, LIU Jing-wei, SUN Yue, BAI Bao-ming. On the rateless character of irregular RA codes[J]. Journal of Systems Engineering and Electronics, 2011, 33(3): 654-658.

非规则RA码无码率特性分析

On the rateless character of irregular RA codes

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