Patent ID: 9154085
Filing Date: 2015-10-06
Classification: H03F

Abstract:
1. A system comprising: a linearizer configured to use a predistortion control signal to add predistortion to a receive signal to generate a predistorted signal; a power amplifier configured to amplify power of the predistorted signal to generate a first amplified signal, the power amplifier adding at least one of high side distortion or low side distortion to the predistorted signal, the at least one of the high side distortion or the low side distortion cancelling at least a portion of the predistortion; and a feedback block configured to capture a feedback signal based on a previous amplified signal from the power amplifier, to separately sample a high side lobe and a low side lobe of the captured feedback signal, to detect one of high side distortion associated with the high side lobe or low side distortion associated with the low side lobe based on the sampling, and to generate the predistortion control signal based on the one of the high side distortion or the low side distortion detected in the captured feedback signal.