东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (4): 495-499.DOI: -

• 信息与控制 • 上一篇    下一篇

一类具有稳健无标度特性的LT码及其性能

赵玉丽,朱志良,于海   

  1. (东北大学软件学院,辽宁沈阳110819)
  • 收稿日期:2012-07-02 修回日期:2012-07-02 出版日期:2013-04-15 发布日期:2013-06-19
  • 通讯作者: 赵玉丽
  • 作者简介:赵玉丽(1985-),女,内蒙古赤峰人,东北大学博士研究生;朱志良(1962-),男,辽宁沈阳人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(60872040,61104074);辽宁省自然科学基金资助项目(201202076);中央高校基本科研业务费专项资金资助项目(N100604007,N110417004,N110417005,N110617001);辽宁省博士启动基金资助项目(20100471462,20111001).

Robust ScaleFree LT Code and Its Performance

ZHAO Yuli, ZHU Zhiliang, YU Hai   

  1. School of Software, Northeastern University, Shenyang 110819, China.
  • Received:2012-07-02 Revised:2012-07-02 Online:2013-04-15 Published:2013-06-19
  • Contact: YU Hai
  • About author:-
  • Supported by:
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摘要: 编码符号的度分布是影响LT码编(译)码性能的关键因素.根据LT码译码过程的消息传递机制,构造一类具有复杂特性的网络结构.利用无标度网络具有平均路径长度最短的特性,提出一种具有稳健无标度特性的LT码.实验结果表明,该编码方案在编(译)码效率、冗余因子、译码成功概率等3方面都优于基于健壮孤子分布的LT码和基于次优度分布的LT码.该编码方案对数据在无线中继网络中的可靠、高效传输具有实用价值.

关键词: 信道编码, LT码, 复杂网络, 无标度, 数字喷泉码

Abstract: Degree distribution used for generating encoded symbols is the key problem for designing LT code. A complex network was constructed on the basis of the message traveling principle of the decoding process. A robust scalefree LT code was proposed by applying properties of scalefree network, such as shortest average path length. The results indicated that there were better performances in encoding/decoding efficiency, overhead factor, probability of successful decoding of robust scalefree LT code than those of LT codes based on robust soliton distribution and suboptimal LT code. The validity and efficiency of data transmission in wireless relay networks could be ensured using the proposed method.

Key words: channel coding, LT code, complex network, scalefree, digital fountain code

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