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清华大学学报(自然科学版)  2016, Vol. 56 Issue (9): 925-929    DOI: 10.16511/j.cnki.qhdxxb.2016.21.056
  电子工程 本期目录 | 过刊浏览 | 高级检索 |
适于OBP卫星的Turbo码自适应部分迭代译码
李航1,3, 高镇2, 赵明1,3, 王京1,3
1. 清华大学 电子工程系, 北京 100084;
2. 天津大学 电子信息工程学院, 天津 300072;
3. 清华信息科学与技术国家实验室, 北京 100084
Adaptive partial decode-and-forward of Turbo codes for OBP satellites
LI Hang1,3, GAO Zhen2, ZHAO Ming1,3, WANG Jing1,3
1. Department of Electronic Engineering, Tsinghua University, Beijing 100084, China;
2. School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China;
3. Tsinghua National Laboratory for Information Science and Technology, Beijing 100084, China
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摘要 为解决卫星星上处理平台星上资源有限与Turbo码译码复杂度高的矛盾,该文提出了一种适于卫星星上处理平台的自适应部分译码转发算法,通过降低迭代次数达到减少Turbo码译码器占用资源的目的。该算法的自适应包含2个层面:外层根据信道质量状态动态设定迭代次数范围;内层根据一种新的迭代停止准则提前停止迭代,该停止准则具有计算量小的优点。通过这2个层面的联合自适应,有效地降低了平均迭代次数,相比固定次数的部分迭代译码提高了算法的性能。
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李航
高镇
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王京
关键词 星上处理Turbo码迭代译码自适应译码    
Abstract:An adaptive partial decode-and-forward (APDF) algorithm was developed for on-board processing (OBP) for the high processing complexity Turbo decoder with limited processing resources. This algorithm reduces the number of iterations to lower the resource consumption. The adaptive algorithm contains an upper level where the range of iterations is determined by the link quality and an inner level using an early stopping criterion to reduce computations. The two levels of adaption are combined to decreases the average number of iterations while the performance is improved compared with the partial iterative decode method with fixed iterations.
Key wordson board processing    Turbo codes    iterative decode    adaptive decode
收稿日期: 2016-03-23      出版日期: 2016-09-22
ZTFLH:  TN927+.23  
通讯作者: 王京,教授,E-mail:wangj@tsinghua.edu.cn     E-mail: wangj@tsinghua.edu.cn
引用本文:   
李航, 高镇, 赵明, 王京. 适于OBP卫星的Turbo码自适应部分迭代译码[J]. 清华大学学报(自然科学版), 2016, 56(9): 925-929.
LI Hang, GAO Zhen, ZHAO Ming, WANG Jing. Adaptive partial decode-and-forward of Turbo codes for OBP satellites. Journal of Tsinghua University(Science and Technology), 2016, 56(9): 925-929.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2016.21.056  或          http://jst.tsinghuajournals.com/CN/Y2016/V56/I9/925
  图1 自适应部分迭代译码
  图2 不同信道质量下Turbo码的EXIT图
  图3 平均迭代次数的仿真结果
  图4 误码率性能的仿真结果
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