摘要
随着铁路移动通信系统向数字化与智能化加速演进,传统铁路窄带移动通信系统(GSM-R)多径干扰优化模式已难以适应现代轨道交通对移动通信系统提出的高效精准、智能决策等新型运维需求。本文介绍了GSM-R多径干扰发生的原理和场景特点,并分析了射线追踪(RT)驱动的高铁无线网络优化系统的核心模块和系统架构。以武广高铁山岭隧道场景的语音质差优化为案例,基于高铁无线网络优化系统确定造成语音质差的问题来源,给出3种网络优化方案并进行仿真分析。结果表明,通过调整多径干扰区段光纤远端直放站的发射功率和天线下倾角,语音质差起点处的多径干扰问题得到明显改善,为GSM-R网络多径干扰问题的数字化、高质量优化提供了方案参考和技术积累。
As railway mobile communication systems rapidly evolve toward digitization and intelligence,the traditional multipath-interference optimization model of narrowband GSM-R can no longer satisfy modern rail-transport demands for highly efficient,accurate and intelligent operations and maintenance.This paper first explains the mechanism and scenario-specific features of GSM-R multipath interference,and then analyzes the core modules and overall architecture of a ray-tracing-driven high-speed-rail wireless-network optimization system.Taking the voice-quality degradation that occurs inside a mountain tunnel on the Wuhan—Guangzhou high-speed line as an example,the system is employed to pinpoint the root cause of the poor voice quality.Three network-optimization schemes are proposed and simulated.The results show that by adjusting the optical-fiber repeater's transmit power and antenna downtilt in the multipath-interference zone,the interference at the onset of voice-quality degradation is significantly mitigated,providing a reference solution and technical foundation for the digital,high-quality optimization of GSM-R multipath-interference problems.
作者
朵灏
赵国超
弓子悦
张玉
罗珊
高婷婷
DUO Hao;ZHAO Guochao;GONG Ziyue;ZHANG Yu;LUO Shan;GAO Tingting(CTTL-Terminals,China Academy of Information and Communications Technology,Beijing 100191,China;China Satellite Network Application Institute Co.,Ltd.,Beijing 100001,China;State Key Laboratory of Advanced Rail Autonomous Operation,Beijing Jiaotong University,Beijing 100044,China;School of Electronic and Information Engineering,Beijing Jiaotong University,Beijing 100044,China;Beijing MetaRadio Technology Co.,Ltd.,Beijing 100076,China;CRSC Research&Design Institute Group Co.,Ltd.,Beijing 100070,China)
出处
《太赫兹科学与电子信息学报》
2025年第12期1250-1260,共11页
Journal of Terahertz Science and Electronic Information Technology
基金
四电数字孪生设计仿真运维一体化平台研究资助项目(2300-K1240018)
航空科学基金资助项目(2022Z0660M5001)。
