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    Methods and apparatus for use in obtaining frequency synchronization in an OFDM communication system
    2.
    发明授权
    Methods and apparatus for use in obtaining frequency synchronization in an OFDM communication system 失效
    用于在OFDM通信系统中获得频率同步的方法和装置

    公开(公告)号：US06700866B1

    公开(公告)日：2004-03-02

    申请号：US09594890

    申请日：2000-06-14

    申请人： Jari M. Heinonen ,  Michael R. Hirano ,  Steven E. McMeekin ,  Reijo Savola ,  William H. Warner

    发明人： Jari M. Heinonen ,  Michael R. Hirano ,  Steven E. McMeekin ,  Reijo Savola ,  William H. Warner

    IPC分类号： H04B700

    CPC分类号： H04L27/266 ,  H04L27/2659 ,  H04L27/2675

    摘要： An iterative method involves performing a coarse frequency correction process which adjusts receiver frequency so that a pilot tone signal is within a predetermined frequency range and, after performing the coarse frequency correction process, performing a fine frequency correction process which adjusts receiver frequency so that the pilot tone signal is substantially aligned with a pilot tone reference within the predetermined frequency range. By performing these processes, the receiver frequency may be adjusted so that the alias pilot tone signal is substantially aligned with the pilot tone reference and the pilot tone signal is undesirably shifted outside the predetermined frequency range. To eliminate this condition, the method further involves performing the coarse frequency correction process again and, after performing the coarse frequency correction process again, performing the fine frequency correction process again. By performing the coarse frequency correction process again, receiver frequency is adjusted so that the pilot tone signal is within both the predetermined frequency range and the Nyquist sampling frequency range. By performing the fine frequency correction process again, receiver frequency is adjusted so that the pilot tone signal is substantially aligned with the pilot tone reference.

    摘要翻译： 迭代方法包括进行粗调频率校正处理，其调整接收机频率，使得导频音信号在预定频率范围内，并且在执行粗频率校正处理之后，执行调整接收机频率的精细频率校正处理， 音调信号基本上与预定频率范围内的导频音基准一致。 通过执行这些处理，可以调整接收机频率，使得别名导频音信号基本上与导频音调参考一致，并且导频音信号不期望地偏移到预定频率范围之外。 为了消除这种情况，该方法还包括再次执行粗频率校正处理，并且在再次执行粗频率校正处理之后再次执行精细频率校正处理。 通过再次执行粗频率校正处理，调整接收机频率，使得导频音信号在预定频率范围和奈奎斯特采样频率范围内。 通过再次执行精细频率校正处理，调整接收机频率，使得导频音信号基本上与导频音基准一致。