a receiving signal which is received by an antenna 500 is applied to a second finger 501 and a first finger 502 also to the second finger 501 a psch code which is commonly employed in a w cdma system is applied and to the first finger 502 a cpich code is applied the second finger 501 outputs a self correlation result of psch to a second complex multiplier 504 at a symbol period the first finger 502 outputs a self correlation result of cpich to an averager 503 and a first complex multiplier 505 at a symbol period the averager 503 performs an average operation for the output of the first finger 502 for a predetermined time the average operation is a voltage addition average of i q phases in a complex i q plane the output from the averager 503 is a phase vector indicating phase fluctuations in which noise components are suppressed by the average operation power addition operation in the psch will be now described the second complex multiplier 504 performs synchronous detection using the phase vector outputted from the averager 503 a third switch 506 transmits the output from the second complex multiplier 504 to a second adder 508 at a slot period the second adder 508 adds the output from a second delay member 510 which contains the output from the second adder 508 for a predetermined time to the output from the third switch 506 and transmits the result to the second delay member 510 and a fourth switch 512 the fourth switch 512 transmits the output from the second adder 508 to a first comparator 515 psch output power addition operation in the cpich will be now described the first complex multiplier 505 performs synchronous detection using the phase vector outputted.