| 高速铁路环境下TD-SCDMA系统的多普勒频偏校正算法 |
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| 引用本文： | 巩晓群,曹源,谢鑫,姜明,许威.高速铁路环境下TD-SCDMA系统的多普勒频偏校正算法[J].北方交通大学学报,2012(5):51-56. |
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| 作者姓名： | 巩晓群 曹源 谢鑫 姜明 许威 |
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| 作者单位： | [1]东南大学移动通信国家重点实验室,江苏南京210096 [2]北京交通大学轨道交通运行控制系统国家工程中心,北京100044 [3]北京交通大学轨道交通控制与安全国家重点实验室,北京100044 |
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| 基金项目： | 国家自然科学基金资助项目（61101087）; 高等学校博士学科点专项科研基金资助课题（20110092120011）; 轨道交通控制与安全国家重点实验室（北京交通大学）开放课题基金资助（RCS2011K003）; 中央高校基本科研业务费专项资金资助（2012JBM023） |
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| 摘 要： | 高速铁路环境带来的大多普勒频偏会严重破坏移动通信系统性能.为消除大多普勒频偏的影响并且不增加终端的设备复杂度,本文提出一种低运算复杂度的TD-SCDMA系统多普勒（Doppler）频偏校正方案.方案首先利用系统上行时隙中训练序列（Midamble）的结构特点估计多普勒频偏.然后,根据时分复用系统的特点,利用上行时隙的多普勒频偏估计结果在基站端对下行时隙进行多普勒频偏预校正.仿真结果表明,所提出的多普勒频偏校正方案在高速铁路环境下可以取得良好的性能.
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| 关 键 词： | 多普勒频偏 TD-SCDMA 预校正 高速铁路 训练序列 |
Doppler frequency offset compensation in high speed railways for TD-SCDMA systems |
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| GONG Xiaoqun,CAO Yuana,XIE Xin,JIANG Ming,XU Wei.Doppler frequency offset compensation in high speed railways for TD-SCDMA systems[J].Journal of Northern Jiaotong University,2012(5):51-56. |
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| Authors: | GONG Xiaoqun CAO Yuana XIE Xin JIANG Ming XU Wei |
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| Institution: | 1.National Mobile Communications Research Laboratory,Southeast University,Nanjing Jiangsu 210096,China;2 a.National Engineering Research Center of Rail Traffic Control System;b.State Key Laboratory of Rail Traffic Control and Safety,Beijing Jiaotong University,Beijing 100044,China) |
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| Abstract: | Under high-speed railway environments,the performance of wireless communications systems is severely degraded due to large Doppler frequency offset.In order to mitigate the effect of significant Doppler frequency offset,a performance enhanced pre-offset compensation strategy is presented with Doppler frequency offset estimation and precorrection in TD-SCDMA systems.Specifically,by using the structural characteristics of the uplink midamble,the proposed method estimates Doppler frequency offset in the uplink timeslot.Then,the base station precorrects the Doppler frequency offset of the downlink timeslot based on the reciprocity property of TD-SCDMA systems.Simulation results demonstrate that the proposed algorithm significantly improves the performance of high speed railway wireless communication systems. |
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| Keywords: | Doppler frequency offset TD-SCDMA precorrection high speed railway midamble |
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