A Novel Timing Synchronization Method for MIMO-OFDM Systems

Abstract

International audienceTo increase the throughput of transmission systems,MIMO-OFDM technology enables better transmission rateand improves the reception. The synchronization between thetransmitter and the receiver has become a big challenge. A badtiming synchronization causes the loss of a lot of informationin a MIMO-OFDM system. In this paper, a novel timingsynchronization method is proposed for a MIMO-OFDMsystems with Nt transmit antennas and Nr receive antennas.The proposed method is based on transmit an orthogonalCAZAC sequences over different transmit antennas [1].Simulations results show that the proposed solution presentsa good performance at a low SNR (Signal to Noise Ratio) inAWGN and multipath fading Rayleigh channels, where DopplerEffect is not considered for current simulations. Furthermore,this method can be implemented for MIMO-OFDM system upto 8 × 8 as well. In the proposed method, the coarse and finetiming synchronization are done at the same time at each receiveantenna due to the different training sequences transmitted overdifferent transmit antenna