APPARATUS AND METHOD FOR COMPENSATING GAIN OF A DIGITAL PRE-DISTORTION POWER AMPLIFIER IN A TIME DIVISION DUPLEX COMMUNICATION SYSTEM

摘要

A method of compensating for a gain in a digital pre-distortion (DPD) power amplifier in a Time Division Duplex (TDD) communication system, the method comprising the steps of: , The power level of the first signal detected at the input terminal of the DPD power amplifier is measured and the first signal is fed back to the feedback stage of the output stage signal of the DPD power amplifier to the stage before the input stage of the DPD power amplifier And measures a power level for a second signal output through the feedback path and calculates a feedback pass gain that is an absolute value of a difference between a power level for the first signal and a power level for the second signal , Calculates a gain variation amount of the feedback path in consideration of the feedback path gain and a predetermined reference gain, And compensates the gain of the feedback path for the DPD power amplifier in the first period.;Digital predistortion power amplifier, feedback path, receive path, gain compensation