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Apparatus for controlling signal-transmission power, mobile station, method of controlling signal-transmission power, and program

  • US 8,554,263 B2
  • Filed: 08/10/2012
  • Issued: 10/08/2013
  • Est. Priority Date: 03/15/2006
  • Status: Expired due to Fees
First Claim
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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.

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