An Improved Integer Frequency Offset Estimation Scheme for OFDM systems

Orthogonal frequency division multiplexing (OFDM) systems are highly sensitive to carrier frequency offset. This paper deals with estimation method of integer frequency offset (IFO) with improved performance. The proposed IFO estimator exploits two consecutive identical OFDM data symbols with only change of phase. To demonstrate the efficiency of the proposed IFO estimators, comparisons are made with other existing estimator in terms of error performance.