Radio communication apparatus and transmission power control method

Abstract

Channel quality candidate generators 171-1 through 171-16 virtually increase (U) or decrease (D) the transmission power of channels A through D using mutually different patterns, and predict overall channel quality after combining each channel signal in that case. Subtracters 172-1 through 172-16 find the difference between the channel quality predicted by corresponding channel quality candidate generator 171-1 through 171-16 and a target quality, and output a difference value. A selector 173 selects the difference value with the smallest absolute value from among the difference values output from subtracters 172-1 through 172-16, and generates a TPC command to each of channels A through D based on the transmission power of channels A through D virtually increased or decreased by corresponding channel quality candidate generator 171-1 through 171-16. By this means, it is possible for a desired quality to be obtained for overall communications while reducing total transmission power on the transmitting side.

Dependencies are inferred from the claim text.