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铁路通信信号工程技术 ›› 2021, Vol. 18 ›› Issue (4): 35-38,58.DOI: 10.3969/j.issn.1673-4440.2021.04.007

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铁路车地广播通信系统中喷泉码的应用研究

刘亦伟   

  1. 北京全路通信信号研究设计院集团有限公司，北京 100070
  • 收稿日期:2020-05-08 修回日期:2021-02-08 出版日期:2021-04-25 发布日期:2021-08-16
  • 基金资助:
    北京全路通信信号研究设计院集团有限公司科研项目（2300-K1190023.01）

Research on Performance of RaptorQ Code in Railway Broad-casting System

Liu Yiwei   

  1. CRSC Research & Design Institute Group Co., Ltd., Beijing 100070, China
  • Received:2020-05-08 Revised:2021-02-08 Online:2021-04-25 Published:2021-08-16

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摘要： 铁路通信系统具有其特殊的行业应用需求，如高可靠性，低误码率。研究喷泉码（RaptorQ）技术，作为一种前向纠错的编码方式应用于铁路广播通信系统中，可在保证系统误码率的同时，最大限度的利用系统资源。同时，依赖于喷泉码自身的编码特点，译码是否成功仅与接收到信息数量相关，部分信息的丢失不会对应用层信息造成影响。对不同丢包率条件下，达到不同误码率等级要求时所需的译码开销进行仿真，实现对喷泉码性能研究的目的。

关键词: 喷泉码, 前向纠错, 铁路广播通信

Abstract: Railway communication has some specific system requirements, such as high re-liability and availability, low system time delay and error rate. Embedding RaptorQ code in the railway broadcast communication system as a FEC (forward error correction coding) method can effectively reduce the system bit error rate and maximize the use of system resources. Depending on the coding characteristics of Raptor itself, the success of decoding is only related to the amount of information received, and the loss of part of information will not affect the information on application layer..In this paper, we studied the performances of RaptorQ codes by mean of executing some simulations under different packet loss rate to obtain a 100% decoding success rate by gradually increasing the decoding overhead rate.Time Analysis of Wireless Network Slicing Based on Fountain Codes[J]. Journal of Harbin Institute of Technology, 2018, 50(11): 167-170.
[6]马为.喷泉码译码性能分析研究[D].西安：电子科技大学，2012.
[7]龚赟.数字喷泉码度分布优化和Raptor码译码
算法研究[D].桂林:桂林电子科技大学，2017.

Key words: RaptorQ, FEC, railway broadcast communication

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