An improved quadratic poly-harmonic distortion behavioral model

Cai, Jialin; King, Justin; Brazil, Tom

doi:10.1017/s1759078714001159

Cited by 3 publications

(2 citation statements)

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“…As can be seen, the AM-AM curves changed widely with the variation of the load terminations. This kind of dynamic characteristic cannot be predicted by static models [12], [14], and [25]. The proposed dynamic 2D CSWPL model is also validated here.…”

Section: A Load-reflection-independent Pa Modelingmentioning

confidence: 90%

Behavioral Model of RF PAs Including Load Mismatch Effects Based on Canonical Section-wise Piecewise-Linear Function

Cai

King

2020

IEEE Access

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A new, dynamic, double-input, double-output (DIDO), wideband, dynamic, complex envelope, behavioral model for power amplifiers (PAs), accounting for load mismatch effects, is proposed and validated in this paper. The model is constructed based on two-dimensional, dynamic, canonical section-wise piecewise-linear functions (2-D DCSWPL). Compared with existing DIDO behavioral modeling methods, which are almost all exclusively based on polynomial functions, the proposed model permits a vastly extended modeling space for PAs under load mismatch conditions. Experimental examples are given to validate the proposed modeling technique with a 15 W GaN PA under a wide range of output mismatch conditions, driven by a 5 MHz LTE signal. The proposed model shows an average accuracy improvement of 2 dB when compared with the more traditional DIDO memory polynomial (MP) models. In addition, the load reflection-dependent dynamic 2-D CSWPL modeling technique for PAs under mismatch condition is also provided. Compared with load-dependent MP, load-dependent crossover MP (COMP) and load-dependent DIDO MP models, the proposed model shows superior accuracy. Thus, the proposed modeling technique is an excellent choice for the modelling of PA systems that are subject to load mismatch effects. INDEX TERMS Canonical section-wise piecewise-linear Function, dynamic modeling, load mismatch effects, nonlinear behavioral Modeling, RF PAs.

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Section: A Load-reflection-independent Pa Modelingmentioning

confidence: 90%

Behavioral Model of RF PAs Including Load Mismatch Effects Based on Canonical Section-wise Piecewise-Linear Function

Cai

King

2020

IEEE Access

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“…In Refs. and the QS‐QPHD model and its modified version were presented. It was shown that these models could extend the accuracy prediction area in the load Smith chart.…”

Section: Basic Theory Of the New Modelmentioning

confidence: 99%

A new complex envelope behavioral model for load mismatched power amplifiers

Cai

Gonçalves

Pedro

2017

Int J RF Microw Comput Aided Eng

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A new dual-input wideband dynamic Quadratic Poly-Harmonic Distortion (D-QPHD) model for unmatched power amplifiers (PAs) is proposed and validated in this article. Compared with the dynamic PHD (D-PHD) model, the new approach significantly improves the prediction accuracy. As the new model has reduced complexity, it is also more robust against possible rank deficiency problems, but still preserves accuracy, when compared with the recently proposed double-input double-output (DIDO) model. The parameters of the new model also have smaller magnitude distribution range compared with the DIDO model, which also improves the model robustness. Hence, it provides a good modeling choice for complex envelope DIDO modeling. K E Y W O R D S behavioral modeling, DIDO model, PHD model, power amplifier, SISO model Int J RF Microw Comput Aided Eng. 2017;27:e21097.

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