Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30172
A Novel Estimation Method for Integer Frequency Offset in Wireless OFDM Systems

Authors: Taeung Yoon, Youngpo Lee, Chonghan Song, Na Young Ha, Seokho Yoon

Abstract:

Ren et al. presented an efficient carrier frequency offset (CFO) estimation method for orthogonal frequency division multiplexing (OFDM), which has an estimation range as large as the bandwidth of the OFDM signal and achieves high accuracy without any constraint on the structure of the training sequence. However, its detection probability of the integer frequency offset (IFO) rapidly varies according to the fractional frequency offset (FFO) change. In this paper, we first analyze the Ren-s method and define two criteria suitable for detection of IFO. Then, we propose a novel method for the IFO estimation based on the maximum-likelihood (ML) principle and the detection criteria defined in this paper. The simulation results demonstrate that the proposed method outperforms the Ren-s method in terms of the IFO detection probability irrespective of a value of the FFO.

Keywords: Orthogonal frequency division multiplexing, integer frequency offset, estimation, training symbol

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1060165

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1992

References:


[1] R. V. Nee and R. Prasad, OFDM for Wireless Multimedia Communications. London, England: Artech House, 2000.
[2] M. Morelli, C.-C. J. Kuo, and M. O. Pun, "Synchronization techniques for orthogonal frequency division multiple access (OFDMA): A tutorial review," Proc. IEEE, vol. 95, no. 7, pp. 1394-1427, July 2007.
[3] P. H. Moose, "A technique for orthogonal frequency division multiplexing frequency offset correction," IEEE Trans. Commun., vol. 42, no. 10, pp. 2908-2914, Oct. 1994.
[4] T. M. Schmidl and D. C. Cox, "Robust frequency and timing synchronization for OFDM," IEEE Trans. Commun., vol. 45, no. 12, pp. 1613-1621, Dec. 1997.
[5] M. Morelli and U. Mengali, "An improved frequency offset estimator for OFDM applications," IEEE Commun. Lett., vol. 3, no. 3, pp. 75-77, Mar. 1999.
[6] A. Laourine, A. St'ephenne, and S. Affes, "A new OFDM synchronization symbol for carrier frequency offset estimation," IEEE Signal Process. Lett., vol. 14, no. 5, pp. 321-324, May 2007.
[7] G. Ren, Y. Chang, H. Zhang, and H. Zhang, "An efficient frequency offset estimation method with a large range for wireless OFDM systems," IEEE Trans. Vehic. Technol., vol. 56, no. 4, pp. 1892-1895, July 2007.
[8] A. Milewski, "Periodic sequences with optimal properties for channel estimation and fast start-up equalization," IBM J. Res. Develop., vol. 27, no. 5, pp. 426-431, Sep. 1983.