Abstract
This paper introduces a novel method to estimate fractional carrier frequency offset (CFO) under time-varying multipath channels in OFDM systems based on the approximation of Basis Expansion Model (BEM). Due to the symmetrical character of the BEM basis, we propose a new design of training sequence with trailing zeros. This training sequence can be used at the receiver to estimate the frequency offset without channel estimation only in one OFDM symbol. We also compare our method with Beek’s ML estimator and Lv’s fine synchronization estimator. The numerical results demonstrate that the proposed method provides an improved performance when the training sequence has a short length.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Moose P.H. (1994). A technique for orthogonal frequency division multi-plexing frequency offset correction. IEEE Transactions on Communications 42: 2908–2914
Sandell M., Borjesson P.O. and Beek J.J. (1997). ML estimation of time and frequency offset in OFDM systems. IEEE Transactions on Signal Processing 43: 761–766
Stoica P. and Besson O. (2003). Training design for frequency offset and frequency-selective channel estimation. IEEE Transactions on Communications 51(11): 1910–1917
Minn H., Fu X. and Bhargava V.K. (2006). Optimal periodic training signal for frequency offset estimation in frequency-selective fading channels. IEEE Transactions on Communications 54: 1081–1096
Gini F. and Giannakis G.B. (1998). Frequency offset and symbol timing recovery in flat-fading channels: A cyclostationarity approach. IEEE Transactions on Communications 46: 400–411
Park B., Cheon H., Ko E., Kang C. and Hong D. (2004). A blind OFDM synchronization algorithm based on cyclic correlation. IEEE Signal Processing Letters 11: 83–85
Giannakis, G. B., & Tepedelenlioglu, C. (1998). Basis expansion models and diversity techniques for blind identification and equalization of time-varying channels. Proceedings on IEEE (Vol. 86, 1969–1986).
Jiang, Q., Speidel, J., & Zhaon, C. (2007). Pilot-assisted OFDM channel estimation and ICI cancellation for double selective channels. Proceedings on IEEE GLOBECOM’ 2007, Nov. 2007, Washington DC, USA.
Lv T., Li H. and Chen J. (2005). Joint estimation of symbol timing and carrier frequency offset of OFDM signals over fast time-varying multipath channels. IEEE Transactions on Signal Processing 53: 4526–4535
Ma X., Giannakis G.B. and Ohno S. (2003). Optimal training for block transmissions over doubly selective wireless fading channels. IEEE Transactions on Signal Processing 51: 1351–1366
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Jiang, Q., Speidel, J. & Zhao, C. A Novel Carrier Frequency Offset Estimation for OFDM Systems Over Time-Varying Multipath Channels. Wireless Pers Commun 49, 587–596 (2009). https://doi.org/10.1007/s11277-008-9579-x
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11277-008-9579-x