摘要
探讨城市轨道交通信号TD-LTE系统5MHz+3MHz带宽组网方案的背景及原因,对3MHz带宽组网方案的网络性能、带宽容量和抗干扰能力进行分析。经过测试及验证,发现在不改变TD-LTE系统硬件和外界无线环境的情况下,使用3MHz带宽承载车地通信业务性能指标,可满足列车CBTC业务的需求,而且通信频段隔离2MHz带宽后,移动运营商GSM1800邻频信号对3MHz带宽网络的干扰影响会大幅降低。
The background and causes of adopting TD-LTE system’5MHz+3MHz bandwidth for the networking of the signalling system in urban rail transit are explored and an analysis on network performance,bandwidth capacity and anti-interference ability of 3MHz bandwidth network is made.It has been validated in test that adopting 3MHz bandwidth LTE network can satisfied the requirements of CBTC service without changing the TD-LTE system’s hardware and external radio environment and the interferences of adjacent frequency signal from mobile operator’s GSM1800 to the 3MHz bandwidth TD-LTE network can be greatly reduced with 2MHz bandwidth communication frequency isolation.
作者
董超
张昱敏
刘德伟
Dong Chao;Zhang Yumin;Liu Dewei
出处
《铁道通信信号》
2021年第2期92-94,共3页
Railway Signalling & Communication
关键词
轨道交通
组网
干扰
带宽
Rail transit
Networking
Interference
Bandwidth
