摘要
高铁运行速度快、运行环境复杂,轨道沿线网络信道快速变化、频繁小区切换、多普勒频移等特有问题给铁路车地无线通信带来了巨大的挑战。基于列车特殊的运行场景基础上,分析基于位置信息的多普勒效应补偿对于提高接收信号质量的影响,通过实验模拟接收波束成形技术对于LTE每个时隙下网络速率的变化,提出350 km/h高速移动场景下基于位置信息的多普勒效应补偿技术,以验证基于位置信息的多普勒补偿技术和接收波束成形技术在高铁场景下的有效性,并通过实验证明天线间距和天线数量对于波束成形技术的影响关系。
The speed of the high-speed railway is fast and its operating environment is complex.The fast change of the network channel along the track,frequent cell switching,Doppler shift and other specific problems have brought great challenges to the wireless communication between vehicle and ground.Based on the special working environment of the train,the influence of the Doppler effect compensation on the quality of the received signal is analyzed based on the position information.By imitating the change of the network rate under each time slot of the LTE,Doppler effect compensation technique is proposed based on position information in a high-speed moving scene of 350 km/h.The effectiveness of location-aware Doppler compensation technology and receiving beam-forming technology in high-speed railway scenarios is verified by simulation experiments.Eventually,the influence on the performance of beam-forming by the interval and number of antenna is identified.
作者
王忠峰
王富章
董兴芝
WANG Zhongfeng;WANG Fuzhang;DONG Xingzhi(Postgraduate Department,China Academy of Railway Sciences,Beijing 100081,China;Institute of Computing Technologies,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)
出处
《铁道标准设计》
北大核心
2020年第7期153-157,共5页
Railway Standard Design
基金
中国铁路总公司科技研究计划课题(2017F017)。
