铁路沿线LTE与5G移动通信系统间的电磁干扰研究

Research on Electromagnetic Interference Between Wayside LTE and 5G Mobile Communication Systems

2100 MHz是国际标准n1频段,频谱资源相对丰富,适合作为部署我国铁路5G-R系统的目标频率。但该频段与联通通信系统的频率相邻,联通基站对5G-R终端、联通终端对5G-R基站的信号接收可能产生干扰,两系统间存在电磁兼容问题。为保障5G-R通信的可靠性,重点对两系统间的干扰进行理论分析,并在实验室搭建测试环境,对联通基站与5G-R终端间的干扰情况进行静态测试。理论分析和测试结果表明:在现有试验设备的射频参数下,两系统间存在电磁干扰,建议采用基站共址部署等措施进行规避。

2100 MHz is the international standard n1 frequency band with abundant spectrum resources,which is suitable for serving as the target frequency for the deployment of railway 5G-R system in China.However,this frequency band is adjacent to the frequency of communication system of China Unicom,so China Unicom terminals and base stations may cause interference with signal reception of 5G-R terminals and 5G-R base stations,which is the electromagnetic compatibility problem between the two systems.In order to ensure the reliability of 5G-R communication,the interference between the two systems is analyzed theoretically,and a testing environment is set up in the laboratory for the static test on the interference between China Unicom base stations and 5G-R terminals.Theoretical analysis and test results show that electromagnetic interference exists between the two systems with the radio frequency parameters of existing test equipment,so it is suggested to take measures such as co-location deployment of base stations to avoid electromagnetic compatibility problem.