A scalable bandwidth and frequency-dependent DPD linearizer for user equipment power amplifiers with nonflat frequency response
This article presents a scalable digital predistortion (DPD) linearizer for handset power amplifiers (PAs) with nonflat frequency response and assuming a 5G scenario with dynamic resource blocks (RBs) reallocation. The scalable DPD model is designed to be both bandwidth and frequency-dependent, incl...
| Autores: | , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/407354 |
| Acceso en línea: | https://hdl.handle.net/2117/407354 https://dx.doi.org/10.1109/TMTT.2023.3324445 |
| Access Level: | acceso abierto |
| Palabra clave: | Power amplifiers Bandwidth Hardware Power generation Frequency response Linearity Table lookup Field programmable gate arrays Amplificadors (Electrònica) Àrees temàtiques de la UPC::Enginyeria de la telecomunicació |
| Sumario: | This article presents a scalable digital predistortion (DPD) linearizer for handset power amplifiers (PAs) with nonflat frequency response and assuming a 5G scenario with dynamic resource blocks (RBs) reallocation. The scalable DPD model is designed to be both bandwidth and frequency-dependent, including some design constraints targeting a resource-efficient hardware implementation. In order to extract the most relevant basis functions that better trade-off the linearization performance and the required resources of a hardware implementation of the DPD, a feature selection technique based on a constrained version of the doubly orthogonal matching pursuit (DOMP) is proposed. The linearization performance of the proposed DPD method is evaluated on a PA system-on-chip (SoC), considering 5G new radio (NR) signals at different frequency locations and with different bandwidths within a 100 MHz channel. |
|---|