| OFDM系统中面向判决的同步与信道联合估计算法 |
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| 引用本文： | 赵丹,于全,王建新.OFDM系统中面向判决的同步与信道联合估计算法[J].电子与信息学报,2008,30(10):2446-2449. |
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| 作者姓名： | 赵丹 于全 王建新 |
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| 作者单位： | 1. 国防科技大学电子科学与工程学院 长沙410073
2. 中国电子系统设备工程公司研究所 北京100039 |
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| 摘 要： | 该文提出了一种新的面向判决的OFDM时间和载波频率偏差与信道的联合跟踪算法，并给出了开环和闭环两种结构，不同结构适用于不同的信道环境。该算法提取出信道估计结果所包含的同步信息用于实现同步估计，然后利用当前同步估计结果对信道估计结果进行修正，使之尽量逼近真实信道。采用闭环结构并适当地选择块长和反馈因子的取值，该算法可以有效地对时变信道进行跟踪。
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| 关 键 词： | 正交频分复用 同步 信道估计 联合估计 跟踪 |
| 收稿时间： | 2007-3-26 |
| 修稿时间： | 2007-8-2 |
A Combined Symbol Timing and Frequency Synchronization and Channel Estimation Technique Based on Detected Data for OFDM Systems |
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| Zhao Dan,Yu Quan,Wang Jian-xin.A Combined Symbol Timing and Frequency Synchronization and Channel Estimation Technique Based on Detected Data for OFDM Systems[J].Journal of Electronics & Information Technology,2008,30(10):2446-2449. |
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| Authors: | Zhao Dan Yu Quan Wang Jian-xin |
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| Affiliation: | (School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China) (Graduate school of China Electronics Equipment System Engineering Corporation, Beijing 100039, China) |
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| Abstract: | A new combined symbol timing and frequency synchronization and channel estimation technique by using the detected data is developed for OFDM systems.Open-loop and closed-loop schemes are described in details.The synchronization information contained in the channel estimated results which is gained by LS channel estimation method is extracted based on the Maximum Likelihood(ML)criterion for synchronization estimation, and then the estimated results of symbol timing and frequency are used to correct the initi... |
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| Keywords: | OFDM Synchronization Channel estimation Combined estimation Tracking |
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