A Novel Timing Synchronization Method for CDD-OFDM Systems with Spatially Correlated Channel

Cyclic-delay diversity (CDD) schemes require only one inverse discrete Fourier transform (IDFT) operation at the transmitter. As a result, they provide a low-complexity means of increasing the transmission diversity in multiple-input multiple- output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. In this paper, we develop a novel timing synchronization method for CDD-OFDM systems. In our proposed method, the channel correlation between transmit antennas is exploited to enhance timing synchronization accuracy. The simulation results are performed to verify the superiority of the proposed timing synchronization method.