Sponsor
Publication of this article in the Journal of Engineering was funded by Portland State University's open access fund.
Published In
Journal of Engineering
Document Type
Article
Publication Date
1-30-2020
Subjects
Radio frequency amplifiers, Power amplifiers, Telecommunication systems -- Simulation methods, Wireless communication systems
Abstract
This paper proposes an improved estimation approach for modelling RF power amplifiers (PAs) using the Saleh behavioural model. The proposed approach is appropriate for solid-state PA technologies. The 1-dB compression point of the PA is included in the estimation approach to improve the estimation of the Saleh coefficients. Thus, expressions are derived to describe the relationship between the parameters of the Saleh model and the manufacturing specifications of PAs: gain (G), third-order intercept point (IP3) and 1-dB compression point (P1dB). This method is a simple estimation of a memoryless amplitude-to-amplitude (AM/AM) nonlinearity to benefit RF designers evaluating the PA distortion using the PA parameters: P1dB, G, and IP3, before conducting experimental validation. The linearisation method using digital predistortion (DPD) is derived as a function of G, IP3, and P1dB, for mitigating the AM/AM nonlinear distortion. Finally, the modelling and DPD techniques are both evaluated using the experimental results of the GaAs PA.
DOI
10.1049/joe.2019.0973
Persistent Identifier
https://archives.pdx.edu/ds/psu/32416
Citation Details
Al-kanan, H., Yang, X., & Li, F. (2020). Improved estimation for Saleh model and predistortion of power amplifiers using 1-dB compression point. The Journal of Engineering, 2020(1), 13-18.
Description
©2020 The Authors. This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)