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US07826567B2 Method and apparatus for coarse and fine frequency and timing synchronisation 有权
用于粗细和精细频率和定时同步的方法和装置

Method and apparatus for coarse and fine frequency and timing synchronisation
Abstract:
Receivers (1) for receiving frequency signals are, to improve their time synchronization accuracy, provided with synchronization stages (20) for performing a coarse time synchronization through autocorrelating samples of a group of preamble symbols (t1,t2,t3) and a fine time synchronization through crosscorrelating samples of a further group of preamble symbols (t10,G1) with predefined samples. The synchronization stages (20) also perform a coarse and a fine frequency synchronization through detecting and accumulating phases of samples of a yet further group of preamble symbols (t8,t9) and of another group of preamble symbols (T1,T2). The synchronization stages (20) have buffering units (21) and controlling units (22) for controlling mixing units (11) and transformating units (12) in processing stages (10). The preamble symbols have ten short preamble symbols (t1-t10), a guard interval preamble symbol (G 1) and two training symbols (T 1,T2).
Abstract(Chinese):

用于接收频率信号的接收机（1）为了提高它们的时间同步精度，提供有同步级（20），用于通过自相关一组前导码符号（t1，t2，t3）和精细时间的采样来执行粗略的时间同步 通过将另一组前导码符号（t10，G1）与预定义样本相互关联样本来进行同步。 同步级（20）还通过检测和累积另一组前导码符号（t8，t9）和另一组前导符号（T1，T2）的样本的相位来执行粗略和精细的频率同步。 同步级（20）具有用于控制处理级（10）中的混合单元（11）和变换单元（12）的缓冲单元（21）和控制单元（22）。 前导码符号具有十个短前导符号（t1-t10），保护间隔前导码符号（G 1）和两个训练符号（T1，T2）。

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