Adaptive Digital Predistortion (DPD) Techniques for 5G-and-Beyond
Digital Pre-Distortion (DPD) is an essential technology used to meet strict emissions and EVM requirements in 5G radio units. DPD technology reduces the radio's power, weight, and volume by enabling high-efficiency power amplifiers, making 5G radios more practical. An optimized DPD solution can save hundreds of watts of wasted power per multi-element radio. This talk will provide an overview of closed loop adaptive digital predistortion techniques. It will also provide author’s view on how advances in machine learning and deep neural networks can benefit digital predistortion technology for 5G and next generation radio units.