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OFDM系统对载波频率偏移(CFO,CarrierFrequencyOffset)非常敏感,由此产生的ICI将严重影响系统的接收性能。分析了载波偏移对系统ICI的影响,提出了一种可用于OFDM无线局域网系统的载波频率偏移估计算法,同时对估计和补偿算法的实现结构作了详细的说明。
OFDM system is very sensitive to carrier frequency offset (CFO, Carrier Frequency Offset), the resulting ICI will seriously affect the system’s reception performance. The influence of carrier offset on system ICI is analyzed. A carrier frequency offset estimation algorithm which can be used in OFDM wireless local area network system is proposed. At the same time, the implementation of estimation and compensation algorithm is described in detail.