Mobile station with closed loop transmission power control system and method

摘要

The mobile station (10) comprises a step size decider 60 that is for deciding a proper step size of power control level in correspondence with the power fluctuation of the reception signal, and can decide a step size of power control level of itself. The mobile station is used for closed loop power control of reverse link CDMA communication. The closed loop power control uses transmission power control bits. Each transmission power control bit is transmitted from the base station toward the mobile station to designate either an increase or a decrease of the transmission power of the mobile station. When being supplied from the base station with a reception signal subjected to the power fluctuation, the mobile station uses the step size decided in itself to transmit toward the base station an output signal that is subjected to power control.