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    • 30. 发明授权
    • Method for frame and frequency synchronization of an OFDM signal and method for transmitting an OFDM signal
    • 用于OFDM信号的帧和频率同步的方法以及用于发送OFDM信号的方法
    • US07339882B2
    • 2008-03-04
    • US10473631
    • 2002-03-15
    • Wolfgang SchaeferChristian Hansen
    • Wolfgang SchaeferChristian Hansen
    • H04J11/00
    • H04L1/0056H04L1/0071H04L27/2656H04L27/2657H04L27/2675
    • A method for frame and frequency synchronization of an OFDM signal and a signal for transmitting an OFDM signal is described, the purpose of which is to impress a pilot phase profile that is then used at the receiving end for frame and frequency synchronization on pilots which are already contained in the OFDM signal for channel estimation. This has the advantage that no additional transmission capacity has to be used for the synchronization. The method according to the present invention is initiated by a rough time synchronization unit connected upline, which searches for the beginning of the guard interval in the OFDM signal. The comparison between a stored pilot phase profile and the received subcarrier symbol is performed using a cross-correlation, whose result is then evaluated to determine the frame and frequency synchronization.
    • 描述了一种用于OFDM信号的帧和频率同步的方法和用于发送OFDM信号的信号的方法,其目的是在导频上施加导频相位分布,该导频相位分布在接收端被用于帧和频率同步, 已经包含在OFDM信号中用于信道估计。 这具有不需要用于同步的附加传输容量的优点。 根据本发明的方法由连续上行的粗略的时间同步单元启动,其在OFDM信号中搜索保护间隔的开始。 使用互相关来执行存储的导频相位轮廓和接收的副载波符号之间的比较,然后对其结果进行评估以确定帧和频率同步。