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CLC number: TN929.5

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Received: 2006-02-26

Revision Accepted: 2006-09-03

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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.12 P.2104~2109

http://doi.org/10.1631/jzus.2006.A2104


A high performance frequency offset estimator for OFDM


Author(s):  WU Yun, LUO Han-wen, DING Ming, YAN Chong-guang

Affiliation(s):  Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; more

Corresponding email(s):   wuyun_hit@sjtu.edu.cn

Key Words:  OFDM, Frequency offset estimation, Preamble, Chinese residues theorem


WU Yun, LUO Han-wen, DING Ming, YAN Chong-guang. A high performance frequency offset estimator for OFDM[J]. Journal of Zhejiang University Science A, 2006, 7(12): 2104~2109.

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author="WU Yun, LUO Han-wen, DING Ming, YAN Chong-guang",
journal="Journal of Zhejiang University Science A",
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pages="2104~2109",
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publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2006.A2104"
}

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%A DING Ming
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2006.A2104

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T1 - A high performance frequency offset estimator for OFDM
A1 - WU Yun
A1 - LUO Han-wen
A1 - DING Ming
A1 - YAN Chong-guang
J0 - Journal of Zhejiang University Science A
VL - 7
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SP - 2104
EP - 2109
%@ 1673-565X
Y1 - 2006
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2006.A2104


Abstract: 
This paper proposes a simple method to enlarge the estimation range of conventional carrier frequency offset (CFO) estimation methods based on correlations among the identical parts of the preamble. A novel preamble is designed, which is composed of one regular OFDM training block with even numbers of identical parts and one irregular OFDM training block with odd numbers of identical parts. The initial estimates obtained over the two training blocks are next exploited to jointly estimate the CFO. By elaborately selecting the numbers of identical parts for the two training blocks, the proposed CFO estimator can estimate frequency offset over tens of the subcarrier spacing. Simulation results showed that the proposed CFO estimator satisfies the estimate range requirement for the practical OFDM systems, while achieving a very good estimate performance.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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[2] Kuo, C., Chang, J.F., 2005. Generalized frequency offset estimation in OFDM systems using periodic training symbol. IEEE ICC’05, 1:715-719.

[3] Morelli, M., Mengali, U., 1999. An improved frequency offset estimator for OFDM applications. IEEE Commun. Lett., 3(3):75-77.

[4] Rugini, L., Banelli, P., 2005. BER of OFDM systems impaired by carrier frequency offset in multipath fading channels. IEEE Trans. on Wireless Communications, 4(5):2279-2288.

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[6] Seo, B.S., Kim, S.C., Park, J., 2002. Fast coarse frequency offset estimation for OFDM systems by using differentially modulated subcarriers. IEEE Trans. Consum. Electron., 48(4):1075-1081.

[7] 3GPP TSG-RAN-1.TR 25.892, 2004. Feasibility Study for OFDM for UTRAN Enhancement (Release 6) [EB/OL]. Http://www.3gpp.org/ftp/Specs/archive/25series/25.892/25892-600.zip.

[8] Tureli, U.P., Honan, J., Liu, H., 2004. Low-complexity nonlinear least squares carrier offset estimator for OFDM identifiability, diversity and performance. IEEE Trans. on Signal Processing, 52(9):2441-2452.

[9] Wu, M., Zhu, W.P., 2005. A preamble-aided symbol and frequency synchronization scheme for OFDM systems. IEEE ISCAS’05, 3:2627-2630.

[10] Zhao, Z.W., 2006. Performance of a novel carrier frequency offset estimation algorithm for OFDM-based WLANs. J. Zhejiang University SCIENCE A, 7(3):321-325.

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