DIGITAL PREDISTORTION COMPENSATING APPARATUS AND A METHOD USING THE SAME FOR PREVENTING DIVERGENCE OF AN OUTPUT OF AN AMPLIFIER CAPABLE OF SUPPLYING A FILTER COEFFICIENT BY PERFORMING AN ALGORITHM ACCORDING TO A COMPARISON RESULT OF A REFERENCE OUTPUT AND A COUPLED SIGNAL

摘要

PURPOSE: A digital predistortion compensating apparatus for preventing divergence of an output of an amplifier and a method using the same are provided to secure the linearity of the amplifier by preventing diverging the output of the amplifier.;CONSTITUTION: A digital predistortion compensating apparatus(10) includes a digital predistortion filter, a power amplifier(40), and a filter coefficient control unit. The digital predistortion filter receives a predistortion coefficient and predistorts an input signal. The power amplifier amplifies an output of a predistorter. The filter coefficient control unit receives a coupled signal among the input signal and the output of the power amplifier, performs a previously stored algorithm, calculates a filter coefficient and provides the filter coefficient to the digital predistortion filter.;COPYRIGHT KIPO 2013;[Reference numerals] (10) DPD compensator; (100) DPP filter; (220) DPD algorithm execution unit; (240) Filter coefficient providing unit; (30) RF up converter; (40) Power amplifier; (50) RF down converter