| 高速列车车载直放站方案研究 |
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| 引用本文： | 曾令峰,李汉兵.高速列车车载直放站方案研究[J].光通信研究,2012,38(1):60-63. |
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| 作者姓名： | 曾令峰 李汉兵 |
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| 作者单位： | 曾令峰:光纤通信技术和网络国家重点实验室，湖北 武汉 430074武汉虹信通信技术有限责任公司，湖北 武汉 430074
李汉兵:光纤通信技术和网络国家重点实验室，湖北 武汉 430074武汉虹信通信技术有限责任公司，湖北 武汉 430074
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| 摘 要： | 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。
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| 关 键 词： | 车载直放站 穿透损耗 快速切换 多普勒频移 自动频率控制 |
| 收稿时间： | 2011/5/10 |
Study on a scheme for in-train repeaters in high-speed trains |
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| Zeng Lingfeng,Li Hanbing.Study on a scheme for in-train repeaters in high-speed trains[J].Study on Optical Communications,2012,38(1):60-63. |
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| Authors: | Zeng Lingfeng Li Hanbing |
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| Affiliation: | 1,2(1.State Key Laboratory of Optical Communication Technologies and Networks,Wuhan 430074,China; 2.Wuhan Hongxin Telecommunication Technologies Co.,Ltd.,Wuhan 430074,China) |
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| Abstract: | 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. |
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| Keywords: | in-train repeater penetration loss fast handoff Doppler frequency shift AFC |
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