摘要
为了保障轨道交通安全实现LTE-M专频的良好覆盖,不使其受到邻频信号干扰,分析了LTE-M频段及其邻频情况,使用邻频干扰计算原理推导了干扰阈值公式。根据真实地铁环境中无线传输路径损耗模型以及现有无线通信系统设计的需求,提出了一种最佳收发天线距离计算公式和基站布设建议。在此天线布设建议的同时,设计了无线环境监测系统,以便对轨交专网信号和邻频公网信号起到有效的监测。
In order to ensure the safety of rail transit and achieve good coverage of LTE-M special frequency,and avoid the interference of adjacent frequency signal,this paper analyzes the LTE-M frequency band and its adjacent frequency,and derives the interference threshold formula by using the adjacent frequency interference calculation principle.According to the wireless transmission path loss model in the real subway environment and the design requirements of existing wireless communication system,a formula for calculating the optimal distance between transmitting and receiving antennas and a suggestion for base station layout are proposed.In addition to the antenna layout suggestions,a wireless environment monitoring system is designed,which can effectively monitor the signal of the rail transit network and the adjacent frequency public network.
出处
《工业控制计算机》
2021年第8期38-39,41,共3页
Industrial Control Computer
基金
上海市科委项目资助(18511105704)。
关键词
轨道交通
LTE-M
邻频干扰
路径损耗
快速巡检
rail transit
LTE-M
adjacent frequency interference
path loss
quick Inspection
