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Efficient low-complexity digital predistortion for power amplifier linearization


Yousif, Siba Monther and M. Sidek, Roslina and Mekki, Anwer Sabah and Sulaiman, Nasri and Varahram, Pooria (2016) Efficient low-complexity digital predistortion for power amplifier linearization. International Journal of Electrical and Computer Engineering, 6 (3). pp. 1096-1105. ISSN 2088-8708


In this paper, a low-complexity model is proposed for linearizing power amplifiers with memory effects using the digital predistortion (DPD) technique. In the proposed model, the linear, low-order nonlinear and high-order nonlinear memory effects are computed separately to provide flexibility in controlling the model parameters so that both high performance and low model complexity can be achieved. The performance of the proposed model is assessed based on experimental measurements of a commercial class AB power amplifier by applying a single-carrier wideband code division multiple access (WCDMA) signal. The linearity performance and the model complexity of the proposed model are compared with the memory polynomial (MP) model and the DPD with single-feedback model. The experimental results show that the proposed model outperforms the latter model by 5 dB in terms of adjacent channel leakage power ratio (ACLR) with comparable complexity. Compared to MP model, the proposed model shows improved ACLR performance by 10.8 dB with a reduction in the complexity by 17% in terms of number of floating-point operations (FLOPs) and 18% in terms of number of model coefficients.

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Additional Metadata

Item Type: Article
Subject: Digital predistortion; Memory effects; Memory polynomial; Model complexity; Power amplifiers
Divisions: Faculty of Engineering
Institute of Advanced Technology
DOI Number: https://doi.org/10.11591/ijece.v6i3.10328
Publisher: Institute of Advanced Engineering and Science
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 01 Mar 2018 00:13
Last Modified: 01 Mar 2018 00:13
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.11591/ijece.v6i3.10328
URI: http://psasir.upm.edu.my/id/eprint/54130
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