OFDM synchronization using PN sequence and performance
OFDM synchronization using PN sequence and performance
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DOI：
10.1109/pimrc.2003.1264411
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发表时间：
2003-09
期刊：
影响因子：
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通讯作者：
Chunlin Yan;Jiayi Fang;Youxi Tang;Shaoqian Li;Yingtao Li
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文献类型：
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作者：
Chunlin Yan;Jiayi Fang;Youxi Tang;Shaoqian Li;Yingtao Li
本文提出了一种利用PN序列和barker码实现正交频分复用（OFDM）时频同步的新方法，利用barker码提高了时间同步性能，并通过在时间同步过程中设置阈值提出了一种简单有效的方法。本文还提出了一种改进的频率同步算法。多路径利用思想是频率同步算法的核心。本文提出的同步方法的性能优于传统的同步方法。对于中等信噪比，估计精度从10/sup -3/提高到10/sup -4/。采用该方法可以很好地满足基于OFDM的超3G系统的时频同步要求。
In this paper, we propose a novel method for orthogonal frequency-division multiplexing (OFDM) time and frequency synchronization by using PN sequence and barker code, time synchronization performance is improved by barker code, and we also propose a simple but effective method by setting the threshold during time synchronization. Improved frequency synchronization algorithm is presented in this paper too. The idea of multipath utilizing is the core of the frequency synchronization algorithm. The performance of the synchronization proposed here is better than that of conventional methods. Estimation precision is boosted from 10/sup -3/ to 10/sup -4/ for moderate SNR. The requirements of time and frequency synchronization for beyond 3G system based on OFDM can be well satisfied while using the proposed method.