论文部分内容阅读
4、GSM—R的系统结构、技术与功能特点 (1)GSM—R的频率范围。基于无线电传播和系统的可用性等多种原因,900MHz最适合作为移动业务频带。GSM—R系统可以在876~960MHz整个频率范围内工作,但CEPT(欧洲邮政与电信会议)为欧洲国家的铁路通信系统指定了一个专用频带,也即UIC(国际铁路联盟)的GSM—R频带:移动站到基站(上行链路)为876~880MHz,基站到移动站(下行链路)为921~925MHz。
4, GSM-R system structure, technology and features (1) GSM-R frequency range. Based on a variety of reasons such as radio propagation and system availability, 900MHz is best suited as a mobile service band. The GSM-R system can operate over the entire frequency range from 876 to 960 MHz, but CEPT (European Posts and Telecommunications Conference) has designated a dedicated frequency band for rail communication systems in European countries, namely the UIC (International Union of Railways) GSM-R band : Mobile station to base station (uplink) is 876 ~ 880MHz, base station to mobile station (downlink) is 921 ~ 925MHz.