Patent ID: 9245072
Filing Date: 2016-01-26
CPC Classification: G06F

Claim Text:
1. A method of selecting coefficients for modeling a system, the method comprising: receiving data collected from a power amplifier, the power amplifier exhibiting a non-linear gain characteristic, wherein a distortion circuit introduces an inverse distortion signal into an input of the power amplifier; forming a data matrix comprising the data collected from the power amplifier; generating an upper triangular matrix in accordance with the data matrix, the upper triangular matrix comprising a plurality of diagonal elements; pruning the upper triangular matrix to remove one or more columns of the upper triangular matrix comprising diagonal elements that are smaller than a threshold diagonal element, thereby generating a pruned data matrix; generating a coefficient vector in accordance with the pruned data matrix; generating an inverse distortion signal from the coefficient vector; and introducing the inverse distortion signal into the input of the power amplifier.