MIMO􀀁 OFDM will become a key technology of the fourth generation mobile communications system. However, MIMO􀀁 OFDM is sensitive to the CFO and timing synchronization, so the MIMO􀀁 OFDM synchronization technology is very important. This paper proposes an accurate technique for timing and frequency synchronization of multiple􀀁 input multiple􀀁 output ( MIMO ) orthogonal frequency division multiplexing ( OFDM) systems. The technique derives a new preamble signal based on GCL sequences, according with the MIMJO􀀁 OFDM synchronization. The carrier frequency offset ( CFO) estimation is obtained through taking double correlation operations on the preamble signal, and used in the timing synchronization to gain accurate time estimation. The simulation results show that at the same SNR, the proposed method can reduce the BER and the frame transmission BER of the system compared to the conventional method.

基于导频信号的MIMO_OFDM同步技术.pdf

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