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Blind frequency-offset estimator for OFDM systems transmitting constant-modulus symbols

Ghogho, M. and Swami, A. (2002) Blind frequency-offset estimator for OFDM systems transmitting constant-modulus symbols. IEEE Communications Letters, 6 (8). pp. 343-345. ISSN 1089-7798

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We address the problem of carrier frequency offset (CFO) synchronization in OFDM communications systems in the context of frequency-selective fading channels. We consider the case where the transmitted symbols have constant modulus, i.e., PSK constellations. A novel blind CFO estimation algorithm is developed. The new algorithm is shown to greatly outperform a recently published blind technique that exploits the fact that practical OFDM systems are not fully loaded. Further, the proposed algorithm is consistent even when the system is fully loaded. Finally, the proposed CFO estimator is obtained via a one-dimensional search, the same as with the existing virtual subcarrier-based estimator, but achieves a substantial gain in performance (10-dB SNR or one order of magnitude in CFO MSE).

Item Type: Article
Copyright, Publisher and Additional Information: Copyright © 2002 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Electronic & Electrical Engineering (Leeds)
Depositing User: Sherpa Assistant
Date Deposited: 30 Sep 2005
Last Modified: 04 Jun 2014 12:26
Published Version: http://dx.doi.org/10.1109/LCOMM.2002.802040
Status: Published
Refereed: Yes
Identification Number: 10.1109/LCOMM.2002.802040
URI: http://eprints.whiterose.ac.uk/id/eprint/693

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