| 一种适用于多径衰落信道的OFDM系统同步算法 |
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| 引用本文： | 周恩,陈茅茅,王文博.一种适用于多径衰落信道的OFDM系统同步算法[J].电子与信息学报,2005,27(10):1625-1629. |
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| 作者姓名： | 周恩 陈茅茅 王文博 |
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| 作者单位： | 北京邮电大学无线通信中心,北京,100876 |
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| 摘 要： | 该文针对多径衰落信道的具体特点，提出了一种适用于无线衰落信道环境下的OFDM符号同步方法。此种方法利用前一帧估计的信道最大时延来调整相关窗长度，在最大程度上避开了多径的影响；并利用本帧信道估计得到的多径信息进一步完成符号精细同步。仿真证明，该方法比传统的方法有较大的性能改善，比较适合多径衰落信道环境下的符号定时同步。
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| 关 键 词： | 正交频分复用(OFDM) 符号同步 多径衰落信道 多径信息估计 |
| 文章编号： | 1009-5896(2005)10-1625-05 |
| 收稿时间： | 2004-04-15 |
| 修稿时间： | 2004-08-25 |
A Synchronization Algorithm for OFDM Based System in Multipath Fading Channels |
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| Zhou En,Chen Mao-mao,Wang Wen-bo.A Synchronization Algorithm for OFDM Based System in Multipath Fading Channels[J].Journal of Electronics & Information Technology,2005,27(10):1625-1629. |
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| Authors: | Zhou En Chen Mao-mao Wang Wen-bo |
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| Affiliation: | Beijing University of Posts and Telecommunications, Bejing 100876, China |
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| Abstract: | In this paper, a novel synchronization algorithm is proposed for OFDM based system in multipath fading channels. In order to mitigate the effect of the multipath, the length of the correlation window is adapted according to the channel maximum time delay estimated in the fore frame. And the further fine synchronization is completed using the multipath information estimated in current frame. Simulation results demonstrate that the synchronization performances are improved greatly compared with the conventional methods. And the method is much suitable for the OFDM time synchronization in multipath fading channel environment. |
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| Keywords: | OFDM Time synchronization Multipath fading channel Multipath estimation |
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