A Configurable Multi-Mode Digital Predistorter for Single-Band/Dual-Band RF Power Amplifiers With Economic Resource Consumption

Abstract

This paper proposes a novel configurable digital predistorter for the linearization of single-band (SB)/dual-band (DB) power amplifiers (PAs) with multiple working modes. The proposed method can provide random combinations of linearization performance for single-band and dual-band modes, and thus lead to the flexible resource saving. Experiments have been conducted by using a GaN Doherty PA to validate the proposed idea, which is excited by two 20 MHz OFDM signals in SB and DB modes at the center frequency of 2.25 GHz and 2.45 GHz, respectively.