Patent ID: 7362732

Claim:
A tracking circuit in a CDMA receiver, comprising: a correlator for producing a correlation value between a reception signal and each of a plurality of phased spreading codes; a plurality of first memories each corresponding to different phases of the phased spreading codes, for storing correlation values; a first selector for selecting at least two of the first memories to sequentially read correlation values from selected first memories; a power calculator for calculating a power value from each of the correlation values sequentially read from the selected first memories; a plurality of second memories each corresponding to different phases of the phased spreading codes, for storing power values calculated by the power calculator, a second selector for selecting at least two of the second memories to sequentially read power values from selected second memories; a comparator for comparing the power values to produce a comparison result; and a controller for selecting at least two phases from the different phases based on the comparison result and controlling such that the correlator and the power calculator are activated during a time period corresponding to each of the selected phases.