Adaptive compensation systems for mitigating distortion due to nonlinear power amplifiers

摘要

A method for pre-processing a signal prior to receipt of the signal by a non-linear device (NLD) to compensate for AM-AM distortion and AM-PM distortion of the signal by the NLD. The method includes generating a modified amplitude r_k based on an amplitude x_k derived from a digitized envelope R_i,k of the signal, generating a scale factor c_k based on the modified amplitude r_k and the amplitude x_k, generating an AM-AM compensated signal based on the scale factor c_k, generating a first AM-PM phase compensation value based on the modified amplitude r_k, and generating an AM-AM and AM-PM compensated signal by modifying a phase of the AM-AM compensated signal based on the first AM-PM phase compensation value.