Patent ID: 6373902
Filing Date: 2002-04-16
Classification: H04L

Abstract:
A device for linearizing a transmitter using a predistortion technique in a communication system, comprising:a memory including a predistortion lookup table storing predistortion data determined by measuring, in advance, distortion characteristics of the transmitter with respect to input baseband data; an address former accommodating a forming of an address of the memory depending on the input baseband data; a filter coefficient generator adding a reference filter coefficient to the predistortion data output from the memory to generate predistortion filter coefficients; and first and second baseband filters generating a predistorted baseband data output by predistorting and filtering the input baseband data according to said predistortion filter coefficients; wherein the transmitter compensates for distortion characteristics caused by non-linear elements while the predistorted baseband data output from the baseband filters are modulated, up-converted, and amplified.