1-Bit Vector-Switched Model with Localized Step Size for Digital Predistortion of RF Power Amplifiers

In this paper, a new 1-bit vector-switched (VS) model with localized step size is proposed to improve the linearization performance of the existing 1-bit digital predistortion (DPD) model. The proposed method considers the iteration step size calculation errors in different partitions of the input signal amplitude space. The experiment results show that the proposed model has a better performance than the existing 1-bit DPD model and is more comparable to the conventional high-precision DPD model, especially when the power amplifier exhibits unusual nonlinearity.