The Research of HPA Mathematical Model Based on Hyperbolic Tangent Function

The research of HPA mathematical model is an important part of the research on the nonlinearity distortion of HPA. Several HPA mathematical models are compared in this paper. Two simple and practical HPA mathematical models based on hyperbolic tangent function are proposed. And through MATAB simulation verification, it is proved that the both models can realistically fit the nonlinearity distortion of HPA. The both models are simple to implement and easy to realize pre-distortion, which has certain advantages.