中文摘要：

针对分布式多输入多输出-正交频分复用系统,提出一种新的训练序列及时频同步方案。在定时同步方面,它首先利用训练序列的时域共轭对称性完成粗定时同步,在此基础上进一步通过接收信号与本地时域训练序列移动相关完成细定时同步;在频率同步方面,它首先在时域利用接收信号相位差估计小数倍频偏,然后在频域利用训练序列良好的自相关性估计整数倍频偏。该方案不仅能够同时估计出各收发天线对之间的定时偏移和频率偏移,而且估计性能良好。

英文摘要：

A new preamble structure is proposed,and the corresponding time and frequency synchronization algorithms are also presented for distributed multiple input multiple output orthogonal frequency division multiplexing（MIMO-OFDM） systems.The coarse timing synchronization is accomplished by using the symmetric conjugate of the training symbol and the fine timing synchronization is accomplished by moving correlation.The fractional frequency offset is estimated by using the phase difference of the received signal,and the integral frequency offset is estimated by utilizing the good autocorrelation of the training symbol in frequency domain.The proposed preamble structure and synchronization algorithms have a satisfactory performance in distributed MIMO-OFDM systems.