The Research of Digital Predistortion Linearization Mechanism by Fuzzy Decision

With the continuous development of communication technology, the requirements of digital signal transmission are increasing. Linearization mechanism of digital predistortion technology is an important factor on the signal transmission quality. This paper describes the different linear mechanisms of digital pre-distortion technology, respectively parameter estimating method, look-up table method and polynomial method. In addition, based on fuzzy decision method, the study of the linear mechanism was conducted for UHF power amplifiers. The problem was analyzed, from intermodulation suppression, operating bandwidth, linearity improvement, efficiency and complexity, indicating that polynomial mechanism was suitable for UHF power amplifier linearization mechanism.