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Modified Generalized Memory Polynomial Model of RF Power Amplifiers

In this paper, a modified generalized memory polynomial (MGMP) model is proposed for digital predistortion. Using this model to characterize the power amplifier and establish an inverse model can compensate the nonlinear distortion of the power amplifier well. This model changes the form of the envelope terms and deletes some cross terms, which reduces the number of coefficients greatly. The performance of the proposed model is evaluated by linearizing a power amplifier which works at 6GHz. Experiments have proved that this model maintains the performance close to the GMP model while reducing a large number of coefficients.