Patent ID: 7596192

Claim:
A radio communication mobile station comprising: means for receiving a signal transmitted from a base station; variable gain amplifying means for amplifying the received signal; demodulating means for demodulating the amplified signal into baseband signals; instantaneous received power calculating means for calculating instantaneous received power from the baseband signals; fading pitch measuring means for measuring a fading pitch from the instantaneous received power calculated by the instantaneous received power calculating means; average received power calculating means for calculating average received power from the instantaneous received power calculated by the instantaneous received power calculating means; and automatic gain control (AGC) signal generating means for generating an AGC signal to control the gain of the variable gain amplifying means on the basis of the average received power calculated by the average received power calculating means, wherein the average received power calculating means includes means for changing averaging time required to calculate the average received power according to information related to the fading pitch measured by the fading pitch measuring means.