Distortion compensation amplification apparatus of feed forward type and adaptive pre-distortion type

摘要

A feed forward type distortion compensation amplification apparatus, which includes a distortion detection loop and a distortion compensation loop, cancels a first distortion element generated from the distortion detection loop by a second distortion element generated from the distortion compensation loop to generate an output signal, and controls bias levels of the main amplifier and the error amplifier based on a level of the output signal. An adaptive pre-distortion type distortion compensation amplification apparatus includes a detection unit for detecting an input power level, a control unit for storing the input power level and a bias level corresponding thereto and generating the bias level in response to the input power level, and a bias control unit for applying a bias to an amplifier unit in response to the bias level.