Timing Synchronization Method For 2x2 MIMO- OFDM System Using Orthogonal Preamble

In any communication system like MIMO OFDM system the transmitter and the receiver have to be synchronized to each other in order to make efficient transmission. Orthogonal frequency division multiplexing (OFDM) is a special case of multicarrier transmission, which eliminates ISI and ICI, while MIMO (Multi-Input Multi-Output) system increases the bandwidth due to the propagation of signals using multiple transmit antennas. In case of multiple antenna systems, where different transmitters need to be synchronized to different receivers, the synchronization is bit more complicated because of the multiple streams transmitted at the same time in the same channel bandwidth.Thus timing synchronization in MIMO-OFDM system, is the main challenge in order to detect the header of each received frame. In this paper, orthogonal sequences based on the orthogonality are proposed for timing synchronization for Rayleigh channel. Simulation results, for the proposed method, show a good performance for timing synchronization for MIMO-OFDM system by using some LTE parameters.