Frequency synchronization in MIMO OFDM system

The paper proposes a frequency offset method in multi-input multi-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems; it is an improvement of the method of T.C.W. Schenk and A. van Zelst (see Proc. IEEE Vehicular Tech. Conf., Fall 2003). A two-step strategy is adopted. First, a small correlation span is used to get a large estimation range. After the estimated frequency offset is compensated, a large correlation span is used to make the estimation more precise. Simulations in AWGN and Rayleigh channels verified the validity of the proposed algorithm.