Method for communicating in an oversampled ofdm network
    1.
    发明公开
    Method for communicating in an oversampled ofdm network 审中-公开
    在einemüberabgetastetenOFDM-Netz的Verfahren zurÜbertragung

    公开(公告)号:EP2239903A2

    公开(公告)日:2010-10-13

    申请号:EP10003295.2

    申请日:2010-03-26

    IPC分类号: H04L27/26

    摘要: In an oversampled orthogonal frequency-division multiplexing (OFDM) network, the preamble used for time synchronization does not have an ideal autocorrelation function due to guard bands, which degrade the accuracy of symbol timing. Therefore, a zero-correlation-zone (ZCZ) based preamble is used for time synchronization. A cross correlation function (CCF) used for time synchronization is forced to 0 within a certain region around a main lobe. The length of the ZCZ is guaranteed to be larger than a cyclic prefix length of OFDM data symbols synchronization accuracy.

    摘要翻译: 在过采样正交频分复用(OFDM)网络中,用于时间同步的前导码由于保护频带而不具有理想的自相关函数,这降低了符号定时的精度。 因此,基于零相关区(ZCZ)的前导码用于时间同步。 用于时间同步的互相关函数(CCF)在主瓣周围的特定区域内强制为0。 保证ZCZ的长度大于OFDM数据符号同步精度的循环前缀长度。