A Novel Data-Aided Joint Timing and Carrier Frequency Offset Estimation Based on Central Symmetry ZC Sequence in OFDM/OQAM Systems

A Novel Data-Aided Joint Timing and Carrier Frequency Offset Estimation Based on Central Symmetry ZC Sequence in OFDM/OQAM Systems
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OFDM/OQAM系统中基于中心对称ZC序列的新型数据辅助联合定时和载波频偏估计

DOI:
10.1007/s11277-016-3414-6
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发表时间:
2016-09
影响因子:
2.2
通讯作者:
Zhang, Ke
Zhang, Ke
中科院分区:
计算机科学4区
文献类型:
--
作者:
Wang, Jianping;Du, Xianyu;He, Zhen;Zhang, Ke

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在多相结构高效实现之前,利用相同的中心对称ZC序列,提出了一种新的数据辅助的联合定时和载波频偏估计算法。基于ZC序列良好的自相关性能,我们推导出了一种高精度、任意捕获范围的定时偏差估计器,并与现有的两种方法进行了比较。在精确定时后,提出了一种新的频偏估计器,该估计器由两部分组成,分别考虑了信号的等同性和中心对称性。计算机仿真表明,该方法在定时偏差和频偏估计方面有明显的性能改善,特别是在AWGN信道中,该方法具有显著的优势,而在多径信道中,当选择正确的加权因子时,新的估计器仍能显示出更好的性能。
In this paper, a new data-aided joint timing and carrier frequency offset estimation algorithm in OFDM/OQAM system is proposed by utilizing identical central-symmetry ZC sequences before polyphase structure efficient implementation. Based on excellent auto-correlation performance of ZC sequence we derive a timing offset estimator with high accuracy and arbitrary capture range compared with two existed approaches. After the precision timing, a new frequency offset estimator is proposed by two parts, which considered both the identical and central-symmetry properties separately. Computer simulation indicates conspicuous performance improvement in timing offset and frequency offset estimation, especially in a AWGN channel which the proposed method possesses significant advantages while in multipath channel the new estimator can still reveal better performance when selecting the correct weighting factor.
DOI: 10.1109/glocom.2002.1188082
发表时间: 2002-11
期刊: Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE
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