高速列车车载直放站方案研究

Study on a scheme for in-train repeaters in high-speed trains

为了改善高速列车中的通信质量,提出了一种高速铁路移动通信的车载直放站方案。文章简要介绍了车载直放站方案的特点,通过电波传播角度研究了该方案对于克服穿透损耗、缓解快速切换的优点,并从理论和测试结果上说明带有AFC(自动频率控制)功能的车载直放站对于提升信号质量所起的实质性作用。

In order to improve the communication quality in high-speed trains,a scheme for in-train repeaters in the high-speed mobile environment is presented.In this paper,the characteristics of the in-train repeater scheme are briefly introduced.Then,the advantages of this scheme in overcoming the penetration loss and alleviating the fast handoff are studied from the angle of wave propagation.Finally,the substantial role of the in-train repeaters with AFC functions in improving the signal quality is explained theoretically and on the basis of the testing results.