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文中分析了OFDM系统时钟采样频偏对系统性能的影响,提出了一种基于导频的OFDM时钟采样频偏最大似然估计新算法,新算法只需一个OFDM符号就能精确的估计采样频偏,理论分析和仿真表明,新算法在低信噪比条件下仍具有很好的性能。
In this paper, the influence of OFDM system clock sampling frequency offset on system performance is analyzed. A pilot-based maximum likelihood estimation algorithm for OFDM clock sampling frequency offset is proposed. The new algorithm can accurately estimate the sampling frequency offset with only one OFDM symbol The theoretical analysis and simulation show that the new algorithm still has good performance under low SNR.