An OFDM Carrier Frequency Offset Estimation Scheme with Wide Fractional Offset Estimation Range

 

C. Yu¹, Y. Lee², S. Y. Kim³, G. I. Jee⁴, S. Yoon*⁵

 

¹ College of Infomation and Communication Engineering Sungkyunkwan University Suwon, Korea. *syoon@skku.edu.

² College of Infomation and Communication Engineering Sungkyunkwan University Suwon, Korea.

³ Department of Electronics Engineering Konkuk University Seoul, Korea.

⁴ Department of Electronics Engineering Konkuk University Seoul, Korea.

⁵ College of Infomation and Communication Engineering Sungkyunkwan University Suwon, Korea.

 

ABSTRACT

In this paper, we propose a carrier frequency offset (CFO) estimation scheme which is robust to the fractional CFO variation for orthogonal frequency division multiplexing (OFDM) systems. The proposed scheme first performs the envelope equalization process to convert the offset estimation problem to a carrier estimation problem, and then, estimates the integer and fractional parts of CFO by using periodogram of the received signal. Especially, in the estimation stage for fraction CFO, the ratio of the square-roots of periodograms is employed enlarging the estimation range of the stage than that of the conventional scheme. Numerical results demonstrate that the proposed scheme has better estimation performance than the conventional scheme for wider fractional CFO range in various channel conditions.

Keywords: Estimation, carrier frequency offset, orthogonal frequency division multiplexing (OFDM), periodogram.

 

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Acknowledgements

This research was supported by the National Research Foundation (NRF) of Korea under Grants 2012R1A2A2A01045887 and 2012R1A1A2004944 with funding from the Ministry of Education, Science and Technology (MEST), Korea, by the Information Technology Research Center (ITRC) program of the National IT Industry Promotion Agency under Grants NIPA-2012-H0301-12-1005 and NIPA-2012-H0301-122005 with funding from the Ministry of Knowledge Economy (MKE), Korea, and by National GNSS Research Center program of Defense Acquisition Program Administration and Agency for Defense Development.

 

References

[1] J. Sánchez et al., "Mean receiver power prediction for indoors 802.11 WLANs using the ray tracing technique," Journal of Applied Research and Technology, vol. 5, no. 1, pp. 33-48, 2007.         [ Links ]

[2] M. Morelli et al., "Synchronization techniques for orthogonal frequency division multiple access (OFDMA): a tutorial review," Proc. IEEE, vol. 95, no. 7, pp. 1394-1427, 2007.         [ Links ]

[3] H.-J. Kwak and G.-T. Park, "Study on the mobility of service robots," International Journal of Engineering and Technology Innovation, vol. 2, no. 2, pp. 13-28, 2012.         [ Links ]

[4] R. V. Nee and R. Prasad, "OFDM for wireless multimedia communications", Boston, MA: Artech House, 2000.         [ Links ]

[5] T. M. Schmidl and D. C. Cox, "Robust frequency and timing synchronization for OFDM," IEEE Trans. Commun., vol. 45, no. 12, pp. 1613-1621, 1997.         [ Links ]

[6] S. Chang and E. J. Powers, "Efficient frequency-offset estimation in OFDM-based WLAN systems," Electron. Lett., vol. 39, no. 21, pp. 1554-1555, 2003.         [ Links ]

[7] M.-H. Cheng and C.-C. Chou, "Maximum-likelihood estimation of frequency and time offsets in OFDM systems with multiple sets of identical data," IEEE Trans. Sig. Process., vol. 54, no. 7, pp. 2848-2852, 2006.         [ Links ]

[8] G. Ren et al., "An efficient frequency offset estimation method with a large range for wireless OFDM systems," IEEE Trans. Veh. Technol., vol. 56, no. 4, pp. 1892-1895, 2007.         [ Links ]

[9] D. Vybiral et al., "Devices for position detection," Journal of Vibroengineering, vol. 13, no. 3, pp. 531-535, 2011.         [ Links ]

[10] S. Ginzburg et al., "Design and implementation of an indoor localization system for the omnibot omni-directional platform," Trans. Canadian Society for Mechanical Engineering, vol. 33, no. 4, pp. 715-729, 2011.         [ Links ]

[11] P. Toro and M. G. Sanchez, "A study of the correlation between horizontal and vertical polarizations of impulsive noise in UHF," IEEE Trans. Veh. Technol., vol. 56, no. 5, pp. 2844-2849, 2007.         [ Links ]

[12] P. Tsakalides and C. L. Nikias, "Maximum likelihood localization of sources in noise modeled as a stable process," IEEE Trans. Sig. Process., vol. 43, no. 11, pp. 2700-2713, 1995.         [ Links ]

[13] X. Ma and C. L. Nikias, "Parameter estimation and blind channel identification in impulsive signal environments," IEEE Trans. Sig. Process., vol. 43, no. 12, pp. 2884-2897, 1995.         [ Links ]