计算机工程 ›› 2009, Vol. 35 ›› Issue (19): 268-271.doi: 10.3969/j.issn.1000-3428.2009.19.090

• 开发研究与设计技术 • 上一篇    下一篇

不等保护码在CBTC系统中的应用

毛 倩1,徐伯庆1,曾小清2   

  1. (1. 上海理工大学光学与电子信息工程学院信息与通信工程研究所,上海 200093;2. 同济大学交通运输工程学院,上海 200092)

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-10-05 发布日期:2009-10-05

Application of UEP Code in Communication-Based Train Control System

MAO Qian1, XU Bo-qing1, ZENG Xiao-qing2   

  1. (1. Institute of Information & Communication Engineering, College of Optical & Electronic Information Engineering, University of Shanghai for Science and Technology, Shanghai 200093; 2. School of Transportation Engineering, Tongji University, Shanghai 200092)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-10-05 Published:2009-10-05

摘要: 针对轨道交通车地通信中信息对误码敏感程度不同的现象,提出利用不等保护码作为信道编码方案,为基于通信的列车控制(CBTC)系统重要信息提供更好的误码保护。采用分离最小理想的方法给出R-S码空间的构造方法,提出一种适用于具有2个保护能力等级的R-S码的译码算法——二次译码算法。仿真显示,不等保护码可以使高保护等级信息位的信噪比降低0.5 dB以上。

关键词: 不等保护码, 译码算法, 基于通信的列车控制系统

Abstract: Considering the different sensitivities for bit errors of the information in Communication-Based Train Control(CBTC) system, this paper proposes a new error-correcting code for the more important information, which is R-S Unequal Error Protection(UEP) code. The algorithm constructs the code space by separating the minimum ideal, and a new decoding algorithm for R-S UEP codes which have two error protection levels are two is proposed. Simulation show that R-S UEP code makes the SNR of the information with high-level protection reduce by 0.5 dB at least.

Key words: Unequal Error Protection(UEP) code, decoding algorithm, Communication-Based Train Control(CBTC) system

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