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中文摘要：
设计了一种具有异周期毗邻结构的新型循环前缀，提出了相应的OFDM频偏估计算法。该异周期毗邻结构循环前缀由CP1和CP2两部分构成，使OFDM符号具有双周期特征。通过引入较短的CP1，牺牲极少的资源，可以有效克服现有频偏估计方法中的固定频偏估计范围的缺陷，同时具有频偏估计范围大，精度高的特点。
英文摘要：
This paper proposes a heter cycle abutted CP slructure and a two-step OFDM carrier frequency calibration algorithm. The cyclic prefix of the new cyclic prefix is made up of CP1 and CP2, which provide the character of double-cycle for OFDM symbol. By introducing a short CP1, the proposed algorithm can overcome the defect of fixed frequency offset estimation range in currenl frequency estimation method, and achieves larger frequency estimation range while obtaining fine frequency calibration.
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