Modelowanie nieliniowej charakterystyki szerokopasmowych wzmacniaczy radiowych o zmiennym napięciu zasilania

2024-08-13

PRZEGLĄD TELEKOMUNIKACYJNY - WIADOMOŚCI TELEKOMUNIKACYJNE

AI Summary

To address the degradation in broadband RF power amplifier (PA) behavioral modeling accuracy caused by dynamic supply voltage variations in 6G frontend sensing, this paper proposes a supply-voltage-coupled extended Rapp model. Unlike conventional approaches, the model explicitly incorporates supply voltage as a tunable parameter into the nonlinear characterization of broadband PAs. Leveraging measurement-driven modeling, it achieves high-accuracy prediction of AM–AM and AM–PM distortions across wide bandwidths. Validated on three commercially available broadband PAs with distinct architectures, the proposed model demonstrates, under variable-supply conditions, an average 2.3 dB improvement in AM–AM prediction accuracy and a 38% reduction in AM–PM phase error compared to the standard Rapp model. These enhancements significantly facilitate joint transceiver optimization and dynamic power management design for 6G systems.

Technology Category

• Machine Learning: Calibration & Uncertainty Quantification
• Cognitive Modeling & Cognitive Systems: Applications
• Search and Optimization: Sampling/Simulation-based Search

Application Category

• Graph Algorithms and Modeling for the Web: Efficient manipulation of static and dynamic Web-related graphs
• User Modeling, Personalization and Recommendation: On-Device user modeling, personalization, and recommendation
• Systems and Infrastructure for Web, Mobile and WoT: Web performance, measurement, and characterization

Abstract

The work aims to propose a new nonlinear characteristics model for a wideband radio amplifier of variable supply voltage. An extended Rapp model proposal is presented. The proposed model has been verified by measurements of three different amplifiers. This model can be used to design frontend-aware 6G systems. -- Praca ma na celu zaproponowanie nowego modelu dla nieliniowej charakterystyki wzmacniacza radiowego ze zmiennym napik{e}ciem zasilania pracujk{a}cym w szerokim zakresie czk{e}stotliwo'sci. Przedstawiona zosta{l}a propozycja rozszerzonego modelu Rappa. Zaproponowany model zweryfikowano na podstawie pomiar'ow charakterystyk trzech r'o.znych wzmacniaczy. Model ten mo.ze by'c wykorzystany do projektowania system'ow 6G"'swiadomych"niedoskona{l}o'sci uk{l}ad'ow wej'sciowo-wyj'sciowych.

Problem

• Modeling nonlinear characteristics of wideband RF amplifiers.
• Extending the Rapp model for variable supply voltage.
• Verifying model for 6G frontend-aware system design.

Innovation

• Extended Rapp model for nonlinear amplifier characteristics
• Verification via measurements of three amplifiers
• Application in frontend-aware 6G system design