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地铁无线通信系统从频率上又分为两种,采用2.4G ISM频段和采用5.8G ISM频段。因此,从地铁通信的特殊环境和无线信号传播的基本特性出发,对这两个频段的进行一些比较和分析.
Subway wireless communication system from the frequency is divided into two, with 2.4G ISM band and 5.8G ISM band. Therefore, based on the special characteristics of subway communication and the basic characteristics of wireless signal transmission, some comparison and analysis are made between these two frequency bands.