| 一种基于导频能量分布的OFDM频率同步算法 |
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| 引用本文： | 尚政,毛雪鸿,朱近康.一种基于导频能量分布的OFDM频率同步算法[J].中国科学技术大学学报,2006,36(2):125-130. |
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| 作者姓名： | 尚政 毛雪鸿 朱近康 |
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| 作者单位： | 中国科学技术大学个人通信与扩频实验室,安徽合肥,230027 |
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| 基金项目： | 国家科技攻关项目，中国科学院资助项目 |
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| 摘 要： | 提出了一种新的频率同步算法,并将其用于无线正交频分复用(OFDM)系统.该算法根据扩散后的导频能量分布特征,充分利用扩散到相邻子载波上的pilot能量,同时完成了频率粗估计和精估计.还设计了一个实用的积累流程来实现该算法,可以在估计性能和同步时间之间做较好的折中.仿真结果表明,在不同多普勒频偏下,该算法都具有良好的性能.
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| 关 键 词： | 正交频分复用 载波频偏 频率同步 导频 子载波间干扰 |
| 文章编号： | 0253-2778(2006)02-0125-06 |
| 收稿时间： | 09 29 2004 12:00AM |
| 修稿时间： | 03 30 2005 12:00AM |
A pilot energy distribution based frequency synchronization method for wireless OFDM systems |
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| SHANG Zheng,MAO Xue-hong,ZHU Jin-kang.A pilot energy distribution based frequency synchronization method for wireless OFDM systems[J].Journal of University of Science and Technology of China,2006,36(2):125-130. |
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| Authors: | SHANG Zheng MAO Xue-hong ZHU Jin-kang |
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| Abstract: | A new frequency synchronization algorithm for wireless orthogonal frequency division multiplexing(OFDM) systems has been proposed.The method is based on the distribution of the pilot energy,which utilizes the pilots' energy efficiently by collecting the energy leaking into the neighbour sub-carriers,and gives coarse and fine estimations of the frequency offset at the same time.Furthermore,an accumulator is designed to fulfill the algorithm and to make a good trade off between the performance and the synchronization time.Computer simulation results demonstrate that the proposed method performs well even at high Doppler frequency shifts. |
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| Keywords: | ,OFDM,carrier frequency offset, frequency synchronization, pilot, ICI |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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