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前言列车无线通信是保证行车安全,提高运输效率的重要手段。为了避免同频干扰和其他原因,地面电台常常需要采用两组或三组工作频率(包括发射频率和接收频率,以下同)交替配置,如图1a、b所示。
Preface Train wireless communication is an important means to ensure traffic safety and improve transportation efficiency. In order to avoid co-channel interference and other reasons, terrestrial stations often need to use two or three sets of operating frequencies (including the transmitting frequency and receiving frequency, the same below) alternately configured, as shown in Figure 1a, b.