| 一种改进的OFDM定时同步算法 |
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| 引用本文： | 赵江锋,张会生,李立欣. 一种改进的OFDM定时同步算法[J]. 现代电子技术, 2011, 34(3): 31-34,37 |
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| 作者姓名： | 赵江锋 张会生 李立欣 |
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| 作者单位： | 西北工业大学,电子信息学院,陕西,西安,710129 |
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| 摘 要： | OFDM系统是一种多载波通信系统，对同步误差非常敏感，同步不准确在很大程度上降低了系统性能。在SC算法、Minn和Park算法的基础上，提出一种基于训练序列的改进的OFDM同步算法。新算法在频域上使用SC算法的训练符号，并通过对训练符号在时域乘以特殊的伪随机序列来消除定时同步中的峰值平台问题，利用训练序列在频域良好的自相关性估计整数倍频偏。仿真结果表明，与传统算法相比，改进算法在同步位置具有很尖锐的峰值，同步性能更好，符号定时更精确，载波频偏估计也有所提高。
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| 关 键 词： | 正交频分复用 定时同步 循环前缀 训练序列 |
Improved Algorithm for OFDM Timing Synchronization |
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| ZHAO Jiang-feng,ZHANG Hui-sheng,LI Li-xin. Improved Algorithm for OFDM Timing Synchronization[J]. Modern Electronic Technique, 2011, 34(3): 31-34,37 |
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| Authors: | ZHAO Jiang-feng ZHANG Hui-sheng LI Li-xin |
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| Affiliation: | ZHAO Jiang-feng,ZHANG Hui-sheng,LI Li-xin(College of Electronic Information Engineering,Northwestern Polytechnical University,Xi'an 710129,China) |
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| Abstract: | Orthogonal Frequency Division Multiplexing(OFDM) is a special muti-carrier communication system,which is extremely sensitive to synchronization errors which can lead to severe system degradation.An improved training-sequence-based OFDM synchronization algorithm is proposed on the basis of the study of SC,Minn and Park algorithms.The training symbols of SC algorithm are used in the frequency domain in the new algorithm.The plateau in timing synchronization is eliminated by multiplying the special pseudo-rand... |
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| Keywords: | OFDM timing synchronization cyclic prefix training sequence |
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