Spectrum characteristics and predistortion gain in the nonlinear high power amplifier(HPA)

Jang, Kyeongsoo; Ryu, Heung‐Gyoon; Ryu, Sang Burm; Kim, Tae Hyun

doi:10.1109/ictc.2017.8190817

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…DPDs have become popular approaches for improving the linearity of RF PAs for a reliable and an efficient signal transmission [22,23]. The DPD implementation in the digital domain as in Figure 4 is practically more efficient than analog predistortion for compensating the nonlinear distortion in RF PAs.…”

Section: Modeling Of Digital Predistortionmentioning

confidence: 99%

A Simplified Accuracy Enhancement to the Saleh AM/AM Modeling and Linearization of Solid-State RF Power Amplifiers

Al-kanan

2020

Electronics

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The Saleh behavioral model exhibits high prediction accuracy for nonlinearity of traveling-wave tube power amplifiers (TWT-PAs). However, the accuracy of the Saleh model degrades when modeling solid-state power amplifiers (SSPAs) technology. In addition, the polynomial expansion of the Saleh model consists of only odd-order terms as analyzed in this work. This paper proposes a novel model accuracy enhancement for the Saleh amplitude-to-amplitude (AM/AM) model when applied to radio frequency (RF) SSPAs. The proposed model enhancement accounts for the second-order intermodulation distortion, which is an important nonlinearity challenge in wideband wireless communications. The proposed static AM/AM model is a three-parameter rational function, which exhibits low complexity compared to the state-of-the-art behavioral models. A transpose architecture of finite-impulse digital filter is used to quantify the memory effect in SSPAs. A least-squares method is used for extracting all the model parameters. A linearization technique using a three-parameter digital predistortion model is also calculated to compensate for the AM/AM nonlinear distortion in SSPAs. Finally, the identification and evaluation of the enhanced Saleh model is presented based on measurements of RF SSPAs.

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Section: Modeling Of Digital Predistortionmentioning

confidence: 99%

A Simplified Accuracy Enhancement to the Saleh AM/AM Modeling and Linearization of Solid-State RF Power Amplifiers

Al-kanan

2020

Electronics

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“…DPD models perform typical gain expansion in AM/AM conversion to compensate for the gain compression characteristics in RF PAs. The modelling of a DPD involves basically calculating the mathematical inverse function of the PA's behavioural model [17–19]. Thus, the inverse function of the Saleh model is depicted in (28), which is calculated by solving a quadratic equation of the Saleh model.…”

Section: Dpd Modelmentioning

confidence: 99%

Improved estimation for Saleh model and predistortion of power amplifiers using 1‐dB compression point

Al-kanan

Yang

2019

J. eng.

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Experimental Proof of Concept Applying Digital Predistortion to Radio Frequency Power Amplifiers

Sogamoso

Fernández

2021

2021 IEEE Colombian Conference on Communications and Computing (COLCOM)

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Spectrum characteristics and predistortion gain in the nonlinear high power amplifier(HPA)

Cited by 3 publications

References 9 publications

A Simplified Accuracy Enhancement to the Saleh AM/AM Modeling and Linearization of Solid-State RF Power Amplifiers

A Simplified Accuracy Enhancement to the Saleh AM/AM Modeling and Linearization of Solid-State RF Power Amplifiers

Improved estimation for Saleh model and predistortion of power amplifiers using 1‐dB compression point

Experimental Proof of Concept Applying Digital Predistortion to Radio Frequency Power Amplifiers

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