公开(公告)号：EP2781031A4

公开(公告)日：2015-07-22

申请号：EP11875670

申请日：2011-11-16

Applicant: FREESCALE SEMICONDUCTOR INC

Inventor： GACH ROBERT ,  DELBECQ DOMINIQUE

IPC: H04B1/7075 ,  H04B1/16 ,  H04B7/08

CPC classification number: H04B1/709 ,  H04B1/7075 ,  H04B7/0802 ,  H04B2201/707

Abstract: A direct-sequence spread spectrum signal receiving device may comprise a receiver unit, a chip sequence generating unit, a correlation unit, and comparison unit. The receiver unit may extract a chip stream from a radio-frequency signal, said chip stream containing a first chip sequence. The chip sequence generating unit may generate a plurality of trial chip sequences on the basis of a first trial chip sequence and on the basis of a plurality of index rotations. The correlation unit may determine a plurality of correlation values on the basis of said plurality of trial chip sequences and on the basis of said first chip sequence, each of said correlation values indicating a degree of correlation between a respective one of said trial chip sequences and said first chip sequence. The comparison unit may determine whether a maximum one of said correlation values exceeds a defined threshold value.