| 一种衰落信道下的OFDM载频同步跟踪算法 |
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| 引用本文： | 朱光喜,张青春,蔡玮.一种衰落信道下的OFDM载频同步跟踪算法[J].华中科技大学学报(自然科学版),2004,32(1):56-59. |
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| 作者姓名： | 朱光喜 张青春 蔡玮 |
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| 作者单位： | 华中科技大学,电子与信息工程系,湖北,武汉,430074;华中科技大学,电子与信息工程系,湖北,武汉,430074;华中科技大学,电子与信息工程系,湖北,武汉,430074 |
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| 基金项目： | 国家高技术研究发展计划资助项目 (2 0 0 1AA12 10 31) |
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| 摘 要： | 提出了一种适合无线衰落信道的正交频分复用(OFDM)系统载频同步跟踪的算法．算法的关键是在发送符号中插入相同的导频序列，利用相邻导频序列的差分相关值的相位来估计载波频率偏差．理论分析和仿真表明，该算法估计范围较小，但估计精度高，适用于载频同步跟踪阶段，可工作于低信噪比条件下。而且在衰落信道下也具有较好的性能．
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| 关 键 词： | 正交频分复用 衰落信道 同步跟踪 |
| 文章编号： | 1671-4512(2004)01-0056-04 |
| 修稿时间： | 2003年6月10日 |
Tracking algorithm of OFDM carrier frequency synchronization on fading channels |
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| Zhu Guangxi Zhang Qingchun Cai Wei Prof., Dept. of Electronics & Information Eng.,Huazhong Univ. of Sci. & Tech.,Wuhan ,China..Tracking algorithm of OFDM carrier frequency synchronization on fading channels[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2004,32(1):56-59. |
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| Authors: | Zhu Guangxi Zhang Qingchun Cai Wei Prof Dept of Electronics & Information Eng Huazhong Univ of Sci & Tech Wuhan China |
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| Institution: | Zhu Guangxi Zhang Qingchun Cai Wei Prof., Dept. of Electronics & Information Eng.,Huazhong Univ. of Sci. & Tech.,Wuhan 430074,China. |
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| Abstract: | A tracking algorithm of OFDM carrier frequency synchronization on wireless fading channels was presented. In this algorithm, the same pilot sequences in symbols were inserted while the carrier frequency offset was estimated in the receiver by correlating pilot sequences from adjacent symbols. The analysis and simulation showed that the frequency offset efficiently estimated was little but accurate, and the algorithm was suitable for carrier frequency synchronization tracking, could work well in the environment with low SNR and had good performance on fading channels. |
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| Keywords: | orthogonal frequency division multiplexing (OFDM) fading channels synchronization tracking |
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