To reduce and curtail a circuit scale of a transmission section of a base station of a radio communication system adopting the CDMA(code division multiple access) system so as to progress increase in the capacity for users.

In the power controller 30 provided with a power control section 200 and a power correction section 1, the power correction section 1 is provided with a mask signal correction section 14a that corrects power control information with respect to transmission on the basis of a mask signal and outputs power control information after the correction, a phase rotation correction section 14 that corrects the power control information after the correction outputted from the mask signal correction section 14a on the basis of a discrimination signal and gives a corrected amplitude to the power control section 200, and a symbol arrangement information arithmetic section 13 that outputs symbol arrangement information on the basis of respective logics of the mask signal to the mask signal correction section 14a and the phase rotation correction section 14.