Loughman, Meabh and Byrne, Declan and Farrell, Ronan and Dooley, John (2022) Acceleration of Digital Pre- Distortion Training Using Selective Partitioning. In: 2022 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR), 16 - 19 January 2022, Las Vegas, Nevada, USA.

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Abstract

In recent years model and Digital Pre-Distortion dimension reduction has been widely researched. The oper- ations involved when running DPD are often far less than those needed during the training of the DPD coefficients. The proposed partitioned Least Squares (LS) adaptation allows a selected subset of DPD coefficients to be updated while the remaining coefficients are held constant. This technique allows a more adaptive training procedure, improved interpretability of the important DPD coefficient’s during training and the ability to partition the DPD function into specific groups. The Frisch-Waugh-Lovell (FWL) theorem is exploited to partition the coefficients of a DPD basis function trained using LS regression. The proposed methodology was experimentally validated with a Generalized Memory Polynomial (GMP) DPD function, used to linearize a 5W power amplifier (PA) driven by a 40MHz 5G-NR signal.

Item Type:	Conference or Workshop Item (Paper)
Keywords:	Acceleration; Digital Pre-Distortion Training; Selective Partitioning;
Academic Unit:	Faculty of Science and Engineering > Electronic Engineering
Item ID:	15642
Identification Number:	https://doi.org/10.1109/PAWR53092.2022.9719839
Depositing User:	Ronan Farrell
Date Deposited:	08 Mar 2022 15:43
Refereed:	Yes
URI:
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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