A Novel Power Amplifier Linearization Technique based on Pre-distortion Principle and Wiener model

The new generation mobile communication systems are very sensitive to the nonlinearities in their transmitting paths. The power amplifier is a key component which generates the nonlinear distortions. Power amplifier linearization techniques are very important to reduce the distortion of the transmitted signal and the adjacent band interference of users. As its facility of implementation, adaptive ability and high efficiency, the pre-distortion technology becomes the first choice to minimize the nonlinear distortions. In this paper, a new technique, based on the pre-distortion principle for linearizing a power amplifier, which is modeled by a Wiener model is proposed. The Wiener model is used to take into account the nonlinearities and the memory effects of the power amplifier. We also propose an efficient and original method for extracting the parameters of the power amplifier’s Wiener Model. Simulation results have been provided for showing the performances of this technique.