Patent ID: 7151405

Claim:
A method for reducing a non-linearity effect of a power amplifier, comprising: receiving a plurality of signals comprising an input signal, a pre-distorted signal, and an output signal, the input signal being pre-distorted to yield the pre-distorted signal, the pre-distorted signal being amplified by a power amplifier to yield the output signal, the output signal exhibiting distortion with respect to the input signal, the distortion comprising an impairment effect and a non-linearity effect; reducing the impairment effect in accordance with the signals using an off-line inverse model; estimating a memory depth of the power amplifier in accordance with the signals using an off-line forward model to generate memory information; estimating non-linearity of the power amplifier in accordance with the memory information using the inverse model; calculating pre-distortion information according to the estimated non-linearity; and reducing the non-linearity effect using the pre-distortion information.