公开(公告)号：CA2677971A1

公开(公告)日：2008-09-12

申请号：CA2677971

申请日：2008-03-04

Applicant: QUALCOMM INC

Inventor： CHEN JOSEPH ,  BREHLER MATTHIAS

IPC: H04L25/02 ,  H04L27/26

Abstract: Apparatus and methods are provided for making timing adjustments in a mul ti carrier communications system. In an aspect, a timing correction method i s. provided for a multi-carrier system. This includes adjusting the time bas is of two or more pilot interlaces with respect to each other (804) in order to account for timing differences between the interlaces when combining the interlaces, and then adjusting or matching the time bases of the combined i nterlaces with a symbol to be demodulated (806). The alignment and matching is performed -in order to generate channel estimates for data demodulation ( 807). The channel estimates, thus generated, along with the timing alignment information are in turn used for determining timing corrections to be appli ed to demodulation of a particular symbol. Corresponding apparatus are also disclosed that implement the methodology.