Method for extracting nonlinear model parameter of wideband signal using narrowband signal, apparatus and method for digital predistortering its using

摘要

PURPOSE: A method for extracting a nonlinear model parameter of a wideband signal using a narrowband signal, an apparatus, and a method for digital pre-distorting using the same by using a two-tone signal of a narrowband are provided to extract a nonlinear parameter at low speed sampling by generating two-tone signal of narrow, changing a frequency, and extracting the nonlinear parameter. CONSTITUTION: In a device, two-tone signal of the narrow band are generated in a frequency band of a wideband signal(601). A parameter of a nonlinear model is extracted by using the generated two-tone signal(602). A parameter of the nonlinear model is extracted while varying the frequency of the two-tone signal. A parameter which is extracted previously set as a current initial value, and the parameter of the nonlinear model is extracted by using the current initial value.