As a radio dispatching communication system, TETRA has been applied in urban rail transit.The design of strength of radio field has to meet special requirements due to complicated radio environment.

• 摘要阐述数字集群系统(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；