Patent ID: 8554263
Filing Date: 2013-10-08
Classification: H04B,H04W

Abstract:
1. A signal-transmission power-controlling apparatus for controlling maximum signal-transmission power among power for transmitting a plurality of signals multiplexed with one another, comprising: a reduction-calculator for 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 a value to determine an amplitude of 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 the value to determine an amplitude; and a controller for controlling said maximum signal-transmission power in accordance with said reduction calculated by said reduction-calculator, wherein said reduction-calculator includes a peak-index calculator which selects, as an average power indication, a square root of a sum of squares of each of said value to determine an amplitude, 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 factors, and calculates, as said peak index, a ratio between said peak power indication and said average power indication.