| 一种上行OFDM-CDMA系统的时频同步算法 |
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| 引用本文： | 郑侃,黄琳,陈茅茅,王文博.一种上行OFDM-CDMA系统的时频同步算法[J].北京邮电大学学报,2005,28(3):72-74. |
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| 作者姓名： | 郑侃 黄琳 陈茅茅 王文博 |
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| 作者单位： | 北京邮电大学,无线信号处理与网络实验室,北京,100876;北京邮电大学,无线信号处理与网络实验室,北京,100876;北京邮电大学,无线信号处理与网络实验室,北京,100876;北京邮电大学,无线信号处理与网络实验室,北京,100876 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 提出了一种适用于上行正交频分复用码分多址接入(OFDMCDMA)系统的简单定时和频率同步方法. 在该方法中，首先通过利用各自在频域和码域上正交训练序列的相关性来完成多用户符号定时估计；然后利用最大似然原则得到频偏估计. 仿真结果表明了该算法具有优良的最小均方误差性能.
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| 关 键 词： | 正交频分复用 码分多址接入 上行同步 |
| 文章编号： | 1007-5321(2005)03-0072-03 |
| 修稿时间： | 2004年6月10日 |
Uplink Time and Frequency Synchronization Algorithm in OFDM-CDMA Systems |
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| Zheng Kan,HUANG Lin,CHEN Mao-mao,WANG Wen-bo.Uplink Time and Frequency Synchronization Algorithm in OFDM-CDMA Systems[J].Journal of Beijing University of Posts and Telecommunications,2005,28(3):72-74. |
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| Authors: | Zheng Kan HUANG Lin CHEN Mao-mao WANG Wen-bo |
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| Affiliation: | Wireless Signal Processing and Network Laboratory, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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| Abstract: | A simple timing and frequency synchronization method for the uplink orthogonal frequency division multiplexing-code division multiple access (OFDM-CDMA)was proposed, where the multi-(user) symbol timing was achieved by making use of good correlation property of training sequences that are distinguished not only in frequency domain but in code domain. Also the frequency offset was estimated based on maximum likelihood (ML) principle. Simulation result shows that the mean square (error) (MSE) performance of the proposed estimation algorithm is satisfied. |
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| Keywords: | orthogonal frequency division multiplexing code division multiple access uplink synchronization |
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