Patent ID: 8380238

Claim:
A method of controlling maximum signal-transmission power among power for transmitting a plurality of signals multiplexed with one another, comprising: a reduction-calculating step of calculating a reduction in said maximum signal-transmission power in accordance with a peak index and a coefficient, said peak index being calculated based on gain factors used for giving a weight to each of said signals, said peak index providing an indication of a ratio between peak power and average power in a signal to be transmitted, said coefficient being predetermined in accordance with a combination of said gain factors; and a controlling step of controlling said maximum signal-transmission power in accordance with said reduction calculated in said reduction-calculating step, wherein said reduction-calculating step includes a step of selecting, as an average power indication, a square root of a sum of squares of each of said gain factors, and, as a peak power indication, a square root of a sum of (a) square of a sum of gain factors of channels assigned to I-phase among said gain factors, and (b) square of a sum of gain factors of channels assigned to Q-phase among said gain factors, and calculating, as said peak index, a ratio between said peak power indication and said average power indication.