Title:
|
Dynamic selection and update of digital predistorter coefficients for power amplifier linearization
|
Author:
|
Pham, Thi Quynh Anh; López Bueno, David; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís
|
Other authors:
|
Universitat Politècnica de Catalunya. Doctorat en Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. CSC - Components and Systems for Communications Research Group |
Abstract:
|
In this paper, a new method for dynamically estimating and updating the coefficients of a digital predistortion (DPD) linearizer is presented. By means of the partial least squares (PLS) algorithm, the basis matrix used in the DPD estimation/adaptation is dynamically updated at every iteration to minimize the linearization error. Moreover, only the minimum necessary DPD coefficients being required to meet a target estimation error are computed. The proposed estimation technique is compared with the standard least squares (LS) estimation solved by using QR decomposition. Experimental results show the similar linearization performance obtained with both estimation methods, but in the case of the dynamic PLS, less coefficients are used at every iteration. Finally, the proposed algorithm allows a high level of parallelization, which makes it suitable for FPGA implementation. © 2019 IEEE. |
Abstract:
|
Peer Reviewed |
Subject(s):
|
-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació -Audio Amplifiers -Digital predistortion -partial least squares regression -power amplifier linearization
Iterative methods -Least squares approximations -Linearization -Digital predistorter -Digital predistortion -Estimation techniques -FPGA implementations -Least squares estimation -Partial least square (PLS) -Partial least squares regression -Power amplifier linearization -Power amplifiers -Amplificadors de baixa freqüència -Detectors |
Rights:
|
|
Document type:
|
Article - Published version Conference Object |
Published by:
|
Institute of Electrical and Electronics Engineers (IEEE)
|
Share:
|
|