Patent ID: 8482349
Filing Date: 2013-07-09
Classification: H03F

Abstract:
1. A method for linearizing a non-linear power amplifier, comprising: performing an iteration algorithm by using a desired output signal of the non-linear power amplifier, to calculate an input signal of the non-linear power amplifier, wherein during iteration n+1, the input signal is adjusted to cancel out the difference between actual output signal and the desired output signal that measured during iteration n, n is an positive integer; whereby with the calculated input signal of the non-linear power amplifier, the non-linear power amplifier is linearized; wherein the iteration algorithm is given by: wherein pa_out_desired is the desired output signal of the non-linear power amplifier pa_in or the iteration algorithm is given by: wherein S wherein pa_mdl_in whereby the input signal of the non-linear power amplifier is obtained by concatenating samples M to B+M−1 of the input signals of the forward model of the non-linear power amplifier of the last iteration for all segments, wherein the forward model of the non-linear power amplifier is a zero delay and memory limited forward model, and an output of the forward model is related to a current input sample and previous M−1 samples of the forward model.