Patent ID: 7379747

Claim:
A method for controlling an output power of a plurality of handheld terminals in a mobile communication system, comprising: generating a TPC (Transmit Power Control) coding value according to transmit output characteristics of each handheld terminal; setting an uplink Eb/No reference value with respect to each handheld terminal and comparing the Eb/No reference value with the respective TPC coding value; selecting an optimum power control command value and transmitting the selected power control command value to the handheld terminal; and adjusting a transmit power level of the handheld terminal based on the TPC coding value and the selected power control command value, wherein the handheld terminal controls the output power by setting an amplification rate of a PA (Power Amplifier) unit and an amplification rate of a mixer unit in order to generate various transmit output characteristics based on the TPC coding value and the optimum power control command sent from the base station such that the base station selectively controls the amplification rates of the PA unit and the mixer unit, and wherein the TPC coding value and the selected power control command value sent from the base station include at least four states including 1) an increase in the amplification rate of the PA unit, 2) an increase in the amplification rate of the mixer unit, 3) a decrease in the amplification rate of the PA unit, and 4) a decrease in the amplification rate of the mixer unit.