不同线路间TD-LTE系统的干扰共存分析  

Coexistence Interference Analysis of TD-LTE Systems Between Different Railway Lines

作　　者：李玲姣 LI Lingjiao(China Railway Fifth Survey and Design Institute Group Co.Ltd.,Beijing 102600,China)

机构地区：[1]中铁第五勘察设计院集团有限公司,北京102600

出　　处：《铁道建筑技术》2022年第12期194-197,共4页Railway Construction Technology

基　　金：中铁第五勘察设计院集团有限公司科技研究开发计划项目(T5Y2020-B04)。

摘　　要：1 785~1 805 MHz频段为行业无线宽带专用网络唯一授权频段,交通行业使用该频段的TD-LTE系统无线专网承载业务与安全运输直接相关,有必要对该频段运行的无线运行环境尤其是不同线路间系统干扰进行分析,以保障系统安全有效运行。针对TD-LTE系统特点,从网络覆盖方面的关键指标“信噪比”层面,通过上下行时隙切换同步和不同步两种方式分别对应6种不同应用场景进行分析,得出不同线路间TD-LTE系统干扰共存的简易算法,以期为交通行业TD-LTE无线专用网络建设提供重要理论依据及解决思路。1 785~1 805 MHz band is the only authorized band for special wireless. The TD-LTE system bearer services with this frequency band is directly related to safety in transportation field. In order to ensure the security and availability of TD-LTE system, it is necessary to analyze the wireless operating environment in this frequency band, especially the interference between different railway lines. According to the characteristics of TD-LTE system, key indicators of network coverage such as “Signal to Interference plus Noise Ratio(SINR)” is analyzed. Because of the TD-LTE system having two modes: uplink and downlink is synchronized or not, six different application scenarios are provided, and a simple algorithm for TD-LTE system interference coexistence between different railway lines is obtained, with a view to providing an important theoretical basis and solution for the construction of TD-LTE special wireless in the transportation field.

关 键 词：TD-LTE 无线专用网络 干扰 信噪比 

分 类 号：TN929.5[电子电信—通信与信息系统]