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Turbo码删截序列全相关特性的进一步研究

张卫党1,2;袁聪1;王新梅1   

  1. (1. 西安电子科技大学 综合业务网理论及关键技术国家重点实验室, 陕西 西安 710071;
    2. 郑州大学 信息工程学院, 河南 郑州 450052)

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2004-12-20 发布日期:2004-12-20

A further study of full-correlation features of punctured sequences in Turbo codes

ZHANG Wei-dang1,2;YUAN Cong1;WANG Xin-mei1

  

  1. (1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi’an 710071, China;
    2. School of Information Engineering, Zhengzhou Univ., Zhengzhou 450052, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2004-12-20 Published:2004-12-20

摘要: 在统计的基础上用全相关的概念对相关序列的全相关特性进行了深入的分析和研究.证明了有关全相关的几个定理和性质,给出了具体的例子,并推导出了计算相关序列之间相同组合数的简化算法.对Turbo码的删截序列进行了分析和计算,对几个不同的交织器求出了不同的删截矩阵所对应的删截序列之间的全相关函数值.通过模拟仿真显示删截序列之间的全相关特性也是影响Turbo码误码特性的一个重要因素.从而为交织器的设计,删截矩阵的选取又提供了一个理论上的依据.

关键词: Turbo码, 交织码, 相关特性, 信道编码

Abstract: We study the full-correlation features of related sequences in depth using the concept of full-correlation. As the preliminary work, we prove several theorems and properties of full-correlation, followed by an example study. Furthermore, we derive a precise iterative algorithm for calculating the number of equal combinations among correlated sequences. Finally, we analyze the punctured sequences of Turbo codes, and calculated the full-correlation value of punctured sequences corresponding to different punctures matrices applied to different interleavers. Simulation results show that the full-correlation value is one of the important factors affecting the BER performance of Tubrbo codes.

Key words: Turbo codes, interleaver, correlations, channel coding

中图分类号: 

  • TN918.1