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Hybrid harmonic‐intermodulation distortion behavioral model for shortwave power amplifiers
Author(s) -
Xu Gaoming,
Liu Taijun,
Ye Yan,
Zhang Xiupu
Publication year - 2019
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21718
Subject(s) - intermodulation , distortion (music) , total harmonic distortion , amplifier , nonlinear distortion , thd analyzer , shortwave , electronic engineering , volterra series , amplitude distortion , acoustics , computer science , mathematics , telecommunications , power (physics) , bandwidth (computing) , physics , engineering , optics , nonlinear system , radiative transfer , quantum mechanics
In this article, a hybrid harmonic‐intermodulation distortion (HHIMD) behavioral model is proposed for imitating the shortwave power amplifier (SWPA) behavioral distortion, that is, harmonic distortion, intermodulation distortion, and memory effect. The proposed model is composed of an intermodulation distortion module, a quadrature digital up‐converter module and a harmonic distortion module. To demonstrate the modeling accuracy, the proposed model and measured SWPA are compared in the time domain and spectrum domain. It is shown that the proposed model can imitate the SWPA not only harmonic and intermodulation distortion, but also memory effect. The modeling normalized mean squared error between the HHIMD and measured SWPA output is lower than −44‐dB.