Patent ID: 7649926

Claim:
A rake receiver comprising: a channel estimator for estimating a channel having a predetermined chip duration by using a synchronization acquisition sequence during a preamble transfer period; a tracking module for detecting a channel variation during a data transfer period and adjusting a synchronization position value when the channel variation is detected; a first switch for selecting one of an output value of an analog-to-digital converter and an output value of a correlator according to a length of a spreading code, and outputting the selected value to the tracking module; a second switch for selecting one of the output value of the analog-to-digital converter and the output value of the correlator according to the length of the spreading code; and a plurality of demodulators having a parallel processing structure to demodulate received signals by using the channel estimation value inputted from the channel estimator, the synchronization position value stored by the tracking module, and an output value of the second switch.