POWER SERIES DIGITAL PRE-DISTORTER AND A DISTORTION COMPENSATION CONTROL METHOD THEREOF, CAPABLE OF QUICKLY ADJUSTING A FREQUENCY FEATURE COMPENSATOR COEFFICIENT

摘要

PURPOSE: A power series digital pre-distorter and a distortion compensation control method thereof are provided to set a phase and an amplitude for the entire band of a distortion component in a frequency property compensator, thereby quickly adjusting a frequency property compensator coefficient.;CONSTITUTION: A digital pre-distorter input signal generating device(990) comprises a transmission signal generator, a pilot signal generator(992), and a switch box(993). A power series type digital pre-distorter(100) comprises a linear transmitting path(101A), the Nth distortion generating route(101B), a distributor(102), a combining device(103), a digital to analog converter(104), an analog to digital converter(105), a distortion monitoring device(106), and a controller(107). An amplifying device(950) comprises an orthogonal modulator(951), a frequency up-converter(952), and a power amplifier(953). A feedback signal generating device(960) comprises a directional coupler(961), a frequency down converter(962), and an orthogonal demodulator(963).;COPYRIGHT KIPO 2011