Patent ID: 7480518

Claim:
A mobile communication terminal comprising: a de-spreader which de-spreads signals received from a base station; a RAKE-synthesizer which RAKE-synthesizes the signals having been de-spread by said de-spreader; a SIR detector which measures a SIR (signal to interference power ratio) of the received signals, based on the signals having been RAKE-synthesized by said RAKE-synthesizer; a SIR comparator which compares a SIR of the received signals to a target SIR; a bit producer which produces a signal in accordance with which said base station controls power at which signals are transmitted, in accordance with the comparison result transmitted from said SIR comparator, and transmits said signal to said base station; a quality detector which measures quality of the received signals at a predetermined interval; a quality comparator which compares the quality of the received signals, transmitted from said quality detector, with target quality, said quality comparator lowering said target SIR, if said quality of the received signals is higher than said target quality, and raising said SIR, if said quality of the received signals is lower than said target quality; and a controller which stores a minimum target SIR therein, and varies said minimum SIR in accordance with a relation between said target SIR and said quality of the received signals.