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    IMPROVED TIME TRACKING LOOP
    51.
    发明授权
    IMPROVED TIME TRACKING LOOP 有权
    改进时间跟踪

    公开(公告)号：EP1466420B1

    公开(公告)日：2010-12-01

    申请号：EP02720819.8

    申请日：2002-01-18

    申请人： QUALCOMM INCORPORATED

    发明人： BLESSENT, Luca

    IPC分类号： H04B1/707

    CPC分类号： H04B1/7075 ,  H04B1/7085

    摘要： A signal receiver uses overlapping sample accumulations in order to acquire and track a received spread spectrum signal with increased speed and accuracy. Sample accumulations are formed by grouping together a predetermined number of consecutive samples. Overlapping sample accumulations may then be created by overlapping a predetermined portion of adjacent sample accumulations. After the overlapping sample accumulations have been created they are transmitted to a timing discriminator in order to determine a timing error indicative of the difference between the timing of the received spread spectrum signal and the signal receiver timing. The timing discriminator compares early and late overlapping accumulation signals in order to determine an updated timing error. The receiver timing is thereafter adjusted according to the timing error. By overlapping the accumulations of samples, adjustments to the system timing may be made more rapidly than if disjoint samples are used.