Patent ID: 8952754
Filing Date: 2015-02-10
Classification: H03F,H04L

Abstract:
1. A method for linearizing an amplifier system having a plurality of heterogeneous amplifier paths, the method comprising: selecting a first amplifier path of the plurality of heterogeneous amplifier paths; providing an input signal to the amplifier system; sampling an output of the amplifier system and an output of a predistorter on the first amplifier path to produce a set of matched pairs of predistorted input values, each predistorted via a current predistortion function of the first amplifier path, and corresponding system outputs; subtracting, for each of the matched pairs, an expected contribution of each amplifier path of the plurality of heterogeneous amplifier paths that is not the first amplifier path from the corresponding system output to produce a set of modified data points comprising the predistorted input values and corresponding modified system outputs; and determining a new predistortion function for the first amplifier path from the set of modified data points.