Patent ID: 6961565

Claim:
A cell search method for a mobile station in a mobile communication system, the method comprising a first step of despreading a received signal using a common spreading code common to all slots and detecting slot boundaries on the basis of a first average correlation coefficient, a second step of despreading the signal on the basis of said slot boundaries detected at the first step, using different individual spreading codes for said respective slots, and detecting frame boundaries and a scramble code group on the basis of a second average correlation coefficient, and a third step of descrambling a common pilot signal on the basis of said frame boundaries and scramble code group detected at the second step, and detecting a scramble code on the basis of a third average correlation coefficient, the method being characterized in that: the average or median of the average correlation values excluding the largest one is calculated, said average or median being a reference value corresponding to an interference power, the detection results for said frame boundaries and scramble code are judged on the basis of a ratio of the largest one of a plurality of said average correlation coefficients to said interference power.