A Novel Method of Frequency-Offset Estimation Using Time Domain PN Sequences in OFDM Systems
A Novel Method of Frequency-Offset Estimation Using Time Domain PN Sequences in OFDM Systems
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DOI：
10.1109/tbc.2007.910924
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发表时间：
2008-02
影响因子：
4.5
通讯作者：
Lin Gui;B. Liu;Wenfeng Ma;Bowei Song
中科院分区：
文献类型：
--
作者：
Lin Gui;B. Liu;Wenfeng Ma;Bowei Song
在某些OFDM系统中，在OFDM符号之间插入时域循环伪随机（PN）序列。本文利用这类PN序列良好的相关特性，提出了一种频偏估计方法。该方案通过结合不同精度和范围的三级估计，实现了不同信道环境下的准确频率估计。仿真结果表明，该方法在AWGN信道和多径信道中都具有良好的性能。
In some OFDM systems, time domain cyclic pseudo-random (PN) sequences are inserted between OFDM symbols. This paper proposes a frequency-offset estimation method utilizing the good correlation property of such PN sequences. By combining three levels of estimations, which have different precisions and ranges, the proposed scheme can achieve accurate frequency estimation under different channel environment. Simulation results show that this approach performs well in both AWGN channels and multipath channels.