公开(公告)号：EP1465354A1

公开(公告)日：2004-10-06

申请号：EP03290813.9

申请日：2003-04-01

申请人： STMicroelectronics N.V.

发明人： Cattaneo, Chiara ,  Rinaldi, Nils ,  Frigerio, Matteo ,  Cattenoz, Régis

IPC分类号： H04B1/69

CPC分类号： H04B1/7183 ,  H04B2001/6908

摘要： The incident signal contains a preamble including a training sequence having a series of pulses whose polarity and time shifts are defined by respective polarity code and time-hopping code. The method comprises a digital cross-correlation of the received signal with said training sequence, said cross-correlation step (101) including algebraically summing in accordance with said polarity code (a j ), windows of said received signal, the starting points of said windows being determined by said time-hopping code (c j ), and a detection step for detecting the end point (n synchro ) of the preamble from the result of said cross-correlation step. When the size of the receiving buffer, i.e. the size of the window is smaller than the number N of samples of each replica of the training sequence, it is particularly advantageous that said digital cross-correlation step be performed iteratively in a block-by-block fashion, the computation of each block being split into M slices which are computed by algebraically summing windows N/M samples long.

摘要翻译： 入射信号包含前导码，其包括具有一系列脉冲的训练序列，其极性和时移由相应的极性码和跳时码定义。 该方法包括接收信号与所述训练序列的数字互相关，所述互相关步骤（101）包括根据所述极性码（aj）的代数求和，所述接收信号的窗口，所述窗口的起始点 由所述时间跳跃码（cj）确定，以及检测步骤，用于从所述互相关步骤的结果中检测前导码的终点（nsynchro）。 当接收缓冲器的大小（即，窗口的大小）小于训练序列的每个副本的样本数N时，特别有利的是，所述数字互相关步骤以逐个方式迭代地执行， 每个块的计算被分割成通过代数求和窗口N / M样本长的M个片段。