摘要
随着高速铁路的发展,铁路无线通信系统将由GSM-R技术向LTE-R技术过渡。本文在分析了GSM-R的不足和LTE-R的技术优势的基础上,详细介绍了LTE-R的网络架构和关键技术,分析了正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)、多输入多输出(Multiple Input Multiple Output,MIMO)和载波聚合技术,从它们的目的、工作原理和作用等方面说明了这些技术在提升信道带宽利用率、降低码间干扰、提升系统传输速率和合并频谱资源等方面的作用。
With the development of high-speed railway ,the railway wireless communication system LTE-R will be instead of GSM- R. Based on the analysis of the insufficient of GSM-R and advantages of LTE-R, this paper introduced the details of the LTE-R network architecture and key technologies. The purpose ,working principle and function of Orthogonal Frequency Division Multiplexing（ OFDM）, Multiple Input Multiple Output （MIMO） and carrier aggregation technology were illustrated, the three key technologies were applied in improving channel bandwidth utilization, reducing inter-symbol interference, improving system transmission rate and combining spectrum
出处
《自动化与仪器仪表》
2017年第11期143-145,共3页
Automation & Instrumentation
基金
国家自然科学基金项目(51541902
51669010
61162016
61202314)
甘肃省自然基金项目(1506RJZA082)
关键词
正交频分复用
多输入输出
载波聚合技术
orthogonal frequency division multiplexing
multiple input multiple output
carrier aggregation
