A mobile station comprising: a receiver configured to receive power control information including information for controlling transmit power of the mobile station; a matching controller configured to: determine a first transmit power variation and a second transmit power variation of the mobile station respectively based on the received power control information, wherein the first transmit power variation is determined for a time period in which a component whose capacitance is variable has a first value and the second transmit power variation is determined for a time period in which the component has a second value, determine whether the first transmit power variation is greater than the second transmit power variation, if it is determined that the first transmit power variation is greater than the second transmit power variation, select the second value of the component, if it is determined that the first transmit power variation is less than or equal to the second transmit power variation, select the first value of the component, and generate matching control information based on the selected one of the first value and the second value of the component; and an antenna matcher configured to perform antenna impedance matching depending on the generated matching control information. a receiver configured to receive power control information including information for controlling transmit power of the mobile station; a matching controller configured to: determine a first transmit power variation and a second transmit power variation of the mobile station respectively based on the received power control information, wherein the first transmit power variation is determined for a time period in which a component whose capacitance is variable has a first value and the second transmit power variation is determined for a time period in which the component has a second value, determine whether the first transmit power variation is greater than the second transmit power variation, if it is determined that the first transmit power variation is greater than the second transmit power variation, select the second value of the component, if it is determined that the first transmit power variation is less than or equal to the second transmit power variation, select the first value of the component, and generate matching control information based on the selected one of the first value and the second value of the component; and determine a first transmit power variation and a second transmit power variation of the mobile station respectively based on the received power control information, wherein the first transmit power variation is determined for a time period in which a component whose capacitance is variable has a first value and the second transmit power variation is determined for a time period in which the component has a second value, determine whether the first transmit power variation is greater than the second transmit power variation, if it is determined that the first transmit power variation is greater than the second transmit power variation, select the second value of the component, if it is determined that the first transmit power variation is less than or equal to the second transmit power variation, select the first value of the component, and generate matching control information based on the selected one of the first value and the second value of the component; and an antenna matcher configured to perform antenna impedance matching depending on the generated matching control information. <EOS>