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GSM-R系统作为高铁通信的一个重要环节,它可以在列车时速500 km/h以下提供良好、安全的无线数据传输平台。GSM-R系统中无线接口Um是最为复杂的一个环节,然而在列车高速运行情况下多普勒效应和多径衰落特性更为明显,影响了无线传输质量。通过采取有效手段来降低多普勒频偏对高铁通信的影响,减少故障的风险,从而确保高铁通信无线传输安全稳定运行,更好地适应350 km/h以上高速列车运行的无线通信需求,并具有较强的实用性和可操作性。
As an important link of HSR communication, GSM-R system can provide a good and safe wireless data transmission platform under the speed of 500km / h. The wireless interface Um in GSM-R system is the most complicated one. However, the Doppler effect and multi-path fading characteristics are more obvious under the high-speed train operation, which affects the wireless transmission quality. By adopting effective measures to reduce the impact of Doppler shift on HSR communications and reduce the risk of failure, the wireless transmission of HSR communications can be ensured to be safe and stable, and the wireless communication requirements of high-speed trains running at speeds above 350 km / h can be better adapted. Has strong practicality and operability.