城市轨道交通数字集群系统的场强设计

The Design of Field Strength of TETRA System in Urban Rail Transit

阐述数字集群系统(TETRA)作为城市轨道交通无线调度通信系统,在不同无线信号传播环境下其网络场强覆盖的特殊要求；提出场强覆盖设计的基本原则,给出无线信号场强设计计算模型；针对越区切换和多径干扰等问题,给出基于场强覆盖的解决方法,以确保TETRA调度指挥功能的实现与优化。

As a radio dispatching communication system, TERRA has been applied in urban raft transit. The design of strength of radio field has to meet special requirements due to complicated radio environment The calculating model and design principle are proposed in this paper. A method based on field design is prcsented to reinforce the switch across sections and remove infections so as to ensure credible dispatching and control functions and of optimization of TEFRA.