Stochastically approximated multiobjective optimization of dual input digital Doherty Power Amplifier

Niu, Sufeng; Koushik, A. M.; Ma, Rui; Teo, Koon Hoo; Shinjo, Shintaro; Komatsuzaki, Yuji

doi:10.1109/iwcia.2017.8203576

Cited by 7 publications

(3 citation statements)

References 9 publications

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“…The first work related to the online learning-based optimization of DIDPA is proposed in [23]. The authors proposed an adaptive technique based on a simultaneously perturbed stochastic approximation (SPSA) algorithm to tune the power ratio, the phase shift, and the bias voltages as free parameters.…”

Section: A State-of-the-artmentioning

confidence: 99%

“…An extension of the work in [23] is reported in [24], where the authors update the cost function by including, in addition to G and PAE, the output power P out and adjacent channel power ratio (ACPR) as metric referring to the linearity. The optimization process used in [24] is carried out by using a global optimization algorithm such as simulated annealing (SA) in the first order.…”

Section: A State-of-the-artmentioning

confidence: 99%

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A System Approach for Efficiency Enhancement and Linearization Technique of Dual-Input Doherty Power Amplifier

Kantana

Benosman

et al. 2023

IEEE J. Microw.

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In this paper, we propose an efficient system approach to improve the power efficiency of dual-input Doherty power amplifier (DIDPA) with maintaining its linearity level. An auto-tuning process based on a hybrid heuristic search control (HHSC) is applied to optimally define DIDPA configuration by optimizing its free parameters. Digital predistortion (DPD) is then integrated to linearize DIDPA using an optimal reduced-complexity model based on the segmentation approach. An optimal pruning process of the free parameters, based on hill-climbing (HC) heuristics, is proposed to reduce the HHSC complexity in order to refine the optimal DIDPA configuration. The system approach has been approved by experimental results, in different scenarios, using an LTE 20 MHz signal with a PAPR of 8 dB. DPD linearization under optimal DIDPA configuration improved linearity using a low-complex model with only 30 coefficients, which exhibited an error vector magnitude (EVM) of 2.5% and an adjacent channel power ratio (ACPR) of −50 dB at an averaged output power of 34 dBm. By updating the cost function coefficients and pruning the free parameters, DIDPA exhibited an EVM of 3%, an ACPR of −50 dB, and a drain efficiency of 47% at an average output power of 39 dBm.

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Section: A State-of-the-artmentioning

confidence: 99%

Section: A State-of-the-artmentioning

confidence: 99%

A System Approach for Efficiency Enhancement and Linearization Technique of Dual-Input Doherty Power Amplifier

Kantana

Benosman

et al. 2023

IEEE J. Microw.

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“…Moreover, an operation bandwidth for the Doherty amplifiers becomes narrower as the output power ratio becomes larger. To address these problems, some new types of Doherty amplifiers have been proposed to date [5][6][7][8][9][10][11][12][13]. For efficiency enhancement at arbitrary back-off levels, GaN envelope tracking (ET) amplifiers have already been proposed [14,15].…”

Section: Hpa Technology Trend In Sub6 Ghzmentioning

confidence: 99%

Overview and Prospects of High Power Amplifier Technology Trend for 5G and beyond 5G Base Stations

Yamanaka

Shinjo

Komatsuzaki

et al. 2021

IEICE Trans. Electron.

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senior member, Shintaro SHINJO † , senior member, Yuji KOMATSUZAKI † , member, Shuichi SAKATA † , member, Keigo NAKATANI † , member, Yutaro YAMAGUCHI † , member SUMMARY High power amplifier technologies for base transceiver stations (BTSs) for the 5th generation (5G) mobile communication systems and so-called beyond 5G (B5G) systems are reviewed. For sub-6, which is categorized into frequency range 1 (FR1) in 5G, wideband Doherty amplifiers are introduced, and a multi-band load modulation amplifier, an envelope tracking amplifier, and a digital power amplifier for B5G are explained. For millimeter wave 5G, which is categorized into frequency range 2 (FR2), GaAs and GaN MMICs operating at around 28GHz are introduced. Finally, future prospect for THz GaN devices is described.

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A Wide-band Power Amplifier based on Genetic Algorithm and Direct Layout Optimization

Sun

Chen

Cai

et al. 2022

2022 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-A

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Stochastically approximated multiobjective optimization of dual input digital Doherty Power Amplifier

Cited by 7 publications

References 9 publications

A System Approach for Efficiency Enhancement and Linearization Technique of Dual-Input Doherty Power Amplifier

A System Approach for Efficiency Enhancement and Linearization Technique of Dual-Input Doherty Power Amplifier

Overview and Prospects of High Power Amplifier Technology Trend for 5G and beyond 5G Base Stations

A Wide-band Power Amplifier based on Genetic Algorithm and Direct Layout Optimization

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