Patent ID: 7034612

Claim:
An apparatus for reducing distortion of a power amplifier, comprising: a controller that compares a signal fed back from the power amplifier and an input signal and generates temperature and power/phase compensation coefficients and a frequency compensation coefficient based on the comparison; and a pre-distorter that adjusts the input signal based on the temperature and phase/power coefficients and the frequency compensation coefficient generated by the digital pre-distorter controller, wherein the pre-distorter comprises, a first look-up table that stores the temperature and power/phase compensation coefficients generated by the controller, a pre-distorter kernel that compensates the input signal based on the temperature compensation and power/phase coefficients stored in the first look-up table, a correction filter that compensates an output signal of the pre-distorter kernel based on the frequency compensation coefficient, an instantaneous power measuring unit that measures an instantaneous power of the input signal, and an average power measuring unit that measures an average power of an output signal of the instantaneous power measuring unit.