Patent ID: 7869543
Filing Date: 2011-01-11
Classification: H04L

Abstract:
1. A system for processing a communication signal including a baseband amplitude component and a baseband phase component, comprising: an amplitude predictor configured to provide a closed-loop amplitude correction signal for closed-loop pre-distortion of a baseband amplitude component; an amplitude lookup table configured to provide an open-loop amplitude correction signal for open-loop pre-distortion of the baseband amplitude component; an amplitude interpolator configured to build up the amplitude lookup table with a plurality of amplitude correction values during a closed-loop calibration period; a phase predictor configured to provide a closed-loop phase correction signal for closed-loop pre-distortion of a baseband phase component; a phase lookup table configured to provide an open-loop phase correction signal for open-loop pre-distortion of the baseband phase component; and a phase interpolator configured to build up the phase lookup table with a plurality of phase correction values during a closed-loop calibration period.