移动通信多普勒频移与高铁覆盖技术(PDF)
《邮电设计技术》[ISSN:1007-3043/CN:41-1132/TN]
- 期数:
- 2009年12期
- 页码:
- 1-4
- 栏目:
- 本期关注
- 出版日期:
- 2009-12-30
文章信息/Info
- Title:
- Mobile Communication Doppler Frequency Shift and High-speed Railway Coverage Technology
- 文章编号:
- 1007-3043(2009)12-0001-04
- 作者:
- 苏华鸿
- 京信通信系统(广州)有限公司,广东 广州 510663
- Author(s):
- SU Huahong
- Comba Telecom Systems(Guangzhou)Ltd.,Guangzhou 510663,China
- 关键词:
- 高铁通信; 多普勒扩频; 衰落信道
- Keywords:
- High speed railway communication; Doppler spread spectrum; Fading channel
- 分类号:
- TN929.5
- DOI:
- -
- 文献标识码:
- A
- 摘要:
- 介绍多普勒频移实际是频谱扩展,等效为衰落信道,限制了低速率数据的传送。当今的2G与3G在列车时速不超过500 km时均可以对抗多普勒频移,影响通信的主因是快速瑞利衰落。
- Abstract:
- Doppler frequency shift is actually spread spectrum, equal to fading channel. It limits low-rate data transport. 2G and 3G system can resist Doppler frequency shift when the speed of the train is less than 500 km/h. The major factor which effects communication is fast Rayleigh Fading.
更新日期/Last Update: 2010-01-13