Patent ID: 6591089
Filing Date: 2003-07-08
Classification: H03G

Abstract:
A mobile station which transmits an output transmission signal for each of slots with power control, the mobile station comprising:a transmission circuit including a variable gain amplifier, a signal processor, and a power amplifier, the variable gain amplifier being adapted to amplify an intermediate frequency (IF) signal with a gain controlled in accordance with a control signal to produce an amplified IF signal, while the signal processor is adapted to process the amplified IF signal into a radio frequency (RF) signal, the power amplifier being adapted to amplify transmission power of the RF signal to produce an amplified RF signal as the output transmission signal; a signal extractor arranged and adapted to partially extract the output transmission signal to produce an extracted transmission signal over each slot; a wave detector adapted to carry out a wave detection of the extracted transmission signal to produce a resultant signal of the wave detection; a level data register adapted to output a level data signal indicative of a default controlled level of the output transmission signal; an error averager adapted to calculate for each slot an average error of the resultant signal of the level data signal to produce an average error signal; and a level corrector adapted to correct the level data signal with reference to the average error signal to produce a corrected level data signal corresponding to the control signal so that the variable gain amplifier amplifies, as a gain controlled IF signal, the IF signal with a gain controlled in accordance with the corrected level data signal, said gain controlled IF signal being transmitted as the output transmission signal through the signal processor and the power amplifier.