公开(公告)号：EP1414208A1

公开(公告)日：2004-04-28

申请号：EP02079374.1

申请日：2002-10-21

Applicant: STMicroelectronics N.V.

Inventor： Vanderperren, Yves ,  Dehaene, Wim

IPC: H04L27/26

CPC classification number: H04L27/2662 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2675

Abstract: A receiver is disclosed for time synchronization and frequency offset correction using a training sequence with a periodic structure (like e.g. in HIPERLAN/2,DVB or DAB). To this purpose the auto-correlation of the received signal is calculated. Coarse time synchronization is performed by analysing the amplitude and/or phase of the auto-correlation signal, e.g. to detect peaks or some characteristic jumps in the amplitude or the phase curve. Fine time synchronization is performed by cross-correlation of the received signal with the training sequence and by detection of some characteristic pattern in the amplitude of the cross-correlation signal. If the difference of the results of coarse and fine time synchronization exceeds a certain threshold, a "synchronization failure" signal is outputted. The frequency offset correction is carried out in two steps: first from the auto-correlation of short training sequence the sign (direction) of the frequency offset is determined, then from the auto-correlation of long training sequence the accurate frequency offset is obtained.

Abstract translation: 接收机具有用于对来自频率偏移估计单元的频率偏移的接收信号进行补偿以形成补偿的接收信号的单元（17），其中频率偏移估计单元包括用于确定相移的部分。 确定单元通过具有已知训练序列的补偿接收信号的互相关（19）获得接收信号的定时参考。 独立权利要求还包括以下内容：（a）包括接收机的正交频分复用（OFDM）电信系统（b）用于处理包括用已知训练序列调制的载波的接收信号的方法（c） 从包括用已知训练序列调制的载波的接收信号获得定时参考。