Patent ID: 7580489

Claim:
A rake receiver comprising a plurality of finger circuits each for tracking a resolved component of a multipath signal, each of a plurality of finger circuits comprising: an early shifting circuit that derives an early code sequence by advancing a locally generated code sequence by a first variable delay; a first correlating circuit that de-spreads the resolved component using the early code sequence resulting in an early de-spread signal; a late shifting circuit that derives a late code sequence by retarding the locally generated code sequence by a second variable delay that is substantially equal to twice the delay of the first variable delay; a second correlating circuit that de-spreads the resolved component using the late code sequence resulting in a late de-spread signal; a circuit that derives a quality indicator based on at least one of a plurality of signals in the multipath signal, wherein the quality indicator indicates a signal-to-noise ratio of at least one of the plurality of signals in the multipath signal; and an adjustment circuit that generates a correction signal from the early and late de-spread signals to control the tracking of the resolved component of the multipath signal.