An efficient carrier frequency offset estimation scheme for an OFDM system

An efficient carrier frequency offset estimation scheme is proposed for an OFDM system. The proposed scheme estimates frequency offset normalized by subcarrier spacing in two steps: tracking and acquisition steps. The estimation range and the variance of the estimation error are computed by simulation. It is shown that the proposed scheme has a large estimation range without degrading the variance of the estimation error. The proposed scheme has higher throughput efficiency and lower computational complexity than other schemes by using only one pilot OFDM block instead of two