【摘要】 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。更多还原

【Abstract】 The sensitivity of clock sampling frequency offset in orthogonal frequency division multiplexing (OFDM) systems is analyzed, A new algorithm of maximum likelihood based on pilot for OFDM clock sampling offset estimation is proposed. The algorithm can estimate the clock sampling frequency offset accurately by using one OFDM symbol. Theoretical analysis and simulations show that the new algorithm works well at low Single-to-Noise rate (SNR).更多还原