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Synchronization algorithms for MIMO OFDM systems

This paper proposes a time and frequency synchronization solution for MIMO OFDM systems. The synchronization is achieved using one preamble which is simultaneously transmitted from all transmit antennas in the same OFDM time instant. The synchronization is accomplished sequentially by coarse time synchronization, fractional frequency offset estimation, integral frequency offset estimation and fine time synchronization. Simulation results demonstrate that the proposed synchronization algorithms have a satisfactory performance even at a low SNR in a rich multipath environment. And the synchronization performance in a MIMO channel are superior to those in a SISO channel due to its larger diversity gain.