不等保护喷泉码用于应答器报文编码的可行性研究  

Feasibility study on unequal error protection fountain codes with applications to telegram coding

作　　者：蒋大明[1] 侯晓彬[1] 单冬[1] 冯锡生[1] 

机构地区：[1]北京交通大学电子信息工程学院,北京100044

出　　处：《北京交通大学学报》2013年第5期138-142,共5页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

摘　　要：提出将具有不等差错保护特性数字喷泉码作为欧标高速铁路应答器报文编码方案.由于其不依赖重传、译码过程与编码符号到达译码端次序无关等特性非常适于应答器报文传输场景.针对欧标应答器报文长度特征,本文在不同码长条件下对基于权重的不等差错保护算法、拓展窗口喷泉码及复制窗口不等保护算法的性能进行对比分析,通过Matlab仿真得到3种算法在不同码长条件下的性能.验证采用基于喷泉码的不等差错保护方法作为铁路应答器长报文编码方案的可行性.This paper proposed a novel Eurobalise telegram coding strategy by usmg Pountatn codes, with UEP（unequal error protection） property. Digital fountain code is a recently introduced class channel coding which does not rely on retransmission. Its decoding process is not affected by the ord of the arrival encoding symbol sequences, and it can also provide unequal error protection to importa information. So, digital fountain code is very suitable for balise telegram transmission scenario. Bas on the length character of Eurobalise telegram, the paper analysed the performances of three UEP gorithms under the condition of different code lengths by Matlab, and verified the feasibility of lol balise telegram coding strategy based on fountain codes with unequal error protection property

关 键 词：喷泉码 欧标应答器 不等差错保护 报文编码 

分 类 号：U238.4[交通运输工程—道路与铁道工程] TN911.22[电子电信—通信与信息系统]