Patent ID: 8634494

Claim:
A system comprising: an observation receiver configured to: receive a concurrent multi-band signal output by a power amplifier, the concurrent multi-band signal having a plurality of original frequency bands; undersample the concurrent multi-band signal at a select sampling rate to provide an undersampled multi-band signal, where the select sampling rate is such that a frequency-flipped image of at least one of the plurality of original frequency bands of the concurrent multi-band signal and images of any remaining original frequency bands of the plurality of original frequency bands fall within a frequency range of zero to half of the select sampling rate and do not overlap one another; and process the undersampled multi-band signal to provide a plurality of feedback signals for the plurality of original frequency bands of the concurrent multi-band signal, each feedback signal of the plurality of feedback signals corresponding to a different one of the plurality of original frequency bands; and an adaptation sub-system configured to adaptively configure a predistortion sub-system that compensates for non-linearity of the power amplifier based on the plurality of feedback signals.