Patent ID: 8068574
Filing Date: 2011-11-29
Classification: H03F

Abstract:
1. A method for performing digital pre-distortion in an electronic system, the method comprising the steps of: rotating an adjustment gain, which is output from an adjustment gain register, by a gain rotation angle to produce a rotated adjustment gain that is retained in the adjustment gain register, wherein the gain rotation angle is produced by a signal difference calculator based on a phase difference between an input signal to a transmit path of the electronic system and a feedback signal, which is fed back along a feedback path of the electronic system, and which wherein the feedback signal represents an upconverted, analog-converted, amplified, downconverted, and digitized version of the input signal, and wherein the adjustment gain is a complex value representing an inverse of one or more known gains applied to the input signal along the transmit path; applying, by an adjustment gain application element, the rotated adjustment gain to the feedback signal in the feedback path, wherein the rotated adjustment gain is output from the adjustment gain register; and the adjustment gain application element outputting the feedback signal to the signal difference calculator.