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提出了一种利用失配序列来完成OFDM符号同步的新方法。在发端直接加入失配序列作为OFDM符号的训练序列,在收端将OFDM符号序列与失配滤波器系数做相关运算,利用失配序列的优良自相关特性和有效抑制旁瓣的特点,很好地完成符号同步。在多径信道下,与已有方法进行比较。仿真结果表明,提出的算法在计算复杂度低的情况下有效降低了同步均值偏差,提高了正确同步估计的概率。
A new method of using OFDM to synchronize OFDM symbols is proposed. The mismatch sequence is directly added to the training sequence as an OFDM symbol. At the receiving end, the correlation between the OFDM symbol sequence and the mismatch filter coefficients is performed. By utilizing the good autocorrelation property of the mismatched sequence and effectively suppressing the sidelobe, the method is very good Complete symbol synchronization. In the multipath channel, compared with the existing methods. The simulation results show that the proposed algorithm can effectively reduce the average deviation of synchronization and improve the probability of correct synchronization estimation under low computational complexity.