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A New Data-Aided Carrier Frequency Offset Estimation Algorithm for OFDM Systems

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3 Author(s)
Laourine, A. ; INRS-EMT, Montreal, Que. ; Stephenne, A. ; Affes, S.

This paper proposes a new data-aided carrier frequency offset (CFO) estimation scheme for OFDM communications suitable for frequency-selective fading channels. The proposed method is based on the transmission of a specially designed synchronization symbol that creates a particular signal structure between the received observation samples at the receiver. This structure is exploited to derive a very accurate maximum likelihood (ML) CFO estimator. To reduce the estimation complexity, a simplified version with lower computational load is derived which exhibits only a moderate loss in accuracy. This simplified version could typically be employed in the acquisition phase while the original version would allow for a very accurate subsequent tracking phase. Simulations over frequency-selective fading channels confirm the superiority of the proposed method compared to most recent algorithms presented in the literature

Published in:

Signal Processing Advances in Wireless Communications, 2006. SPAWC '06. IEEE 7th Workshop on

Date of Conference:

2-5 July 2006