Distortion Mitigation in RF Power Amplifiers Through FPGA-Based Amplitude and Phase Predistortion

Mato, J.L.; Pereira, M.; Rodríguez-Andina, Juan J.; Fariña, José; Soto, E.; Pérez, Roc Berenguer

doi:10.1109/tie.2008.928115

Cited by 22 publications

(7 citation statements)

References 12 publications

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“…A S IS widely known, power amplifiers (PAs) are the major source of nonlinear distortion and are also the most power consuming devices in numerous industrial electronic applications [1]- [11], e.g., in magnetic bearing [1]- [3], digital video broadcasting [4], radio frequency (RF) transceivers [5]- [8], and dual-band/wideband wireless communications [9], [10]. Specifically, in wireless communications, to enhance the spectral efficiency in modern high-speed wireless communication systems, different nonconstant envelope modulation schemes, such as wideband code division multiple access (WCDMA) [11] in third generation (3G) mobile networks and orthogonal frequency division multiple access in 3rd Generation Partnership Project (3GPP) long-term evolution (LTE), are normally employed.…”

Section: Introductionmentioning

confidence: 99%

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A Robust Augmented Complexity-Reduced Generalized Memory Polynomial for Wideband RF Power Amplifiers

Liu

Zhou

Chen

et al. 2014

IEEE Trans. Ind. Electron.

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This paper proposes a robust model for the accurate behavioral modeling and digital predistortion (DPD) of wideband radio-frequency power amplifiers (PAs). It is constructed using a complexity-reduced generalized memory polynomial (MP) (GMP) (CR-GMP) connected with a nonlinear memory effect (NME) subblock in parallel. The CR-GMP is a complexity-reduced but accuracy-degraded version of the conventional GMP, and its performance is augmented by the extra NME subblock. Hence, the proposed model is termed as augmented CR-GMP (ACR-GMP). The resultant ACR-GMP model can achieve comparable performance as the GMP model, but with much fewer coefficients and lower complexity. Its performance is experimentally assessed both in forward modeling and DPD linearization. Comparisons are conducted between the ACR-GMP model and some state-of-the-art models, such as the MP, the PLUME, and the GMP. Experimental results have been given for a 1.9-GHz 35-W peak-power GaN Class-AB PA driven by two signal scenarios: a 15-MHz bandwidth long-term-evolution signal and a 20-MHz bandwidth widebandcode-division-multiple-access 1001 signal (with the middle two carriers OFF). All the results show that the ACR-GMP model outperforms both the MP and the PLUME models in terms of performances and the GMP model in terms of complexity (at comparable performances).Index Terms-Behavioral modeling, digital predistortion (DPD), generalized memory polynomial (MP) (GMP), memory effect, MP, power amplifiers (PAs).

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Section: Introductionmentioning

confidence: 99%

“…In order to circumvent the conflict between the linearity and the efficiency of the PA, one of the most promising and costeffective linearization techniques to date is digital predistortion (DPD) [4], [5], [9], [10]. It is implemented before the PA as a baseband nonlinear component that is the inverse of the PA's nonlinearity.…”

Section: Introductionmentioning

confidence: 99%

A Robust Augmented Complexity-Reduced Generalized Memory Polynomial for Wideband RF Power Amplifiers

Liu

Zhou

Chen

et al. 2014

IEEE Trans. Ind. Electron.

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“…This paper reports the design of an ESD-protected PA circuit implemented in CMOS technology, which demonstrates a new design optimization procedure for highly reliable RF IC designs for harsh-condition wireless electronics, including PAs, for various applications [15]- [23]. This paper is organized as follows.…”

Section: Esd-protected Power Amplifier Designmentioning

confidence: 99%

ESD-Protected Power Amplifier Design in CMOS for Highly Reliable RF ICs

Wang

Guan²,

Fan³

et al. 2011

IEEE Trans. Ind. Electron.

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Electrostatic discharge (ESD) failure is a major reliability problem, and ESD protection is an emerging design challenge for radio-frequency (RF) integrated circuits demanding extremely high reliability for wireless applications in harsh environments. This paper reports the design and optimization of a 5-kV ESD-protected 2.4-GHz power amplifier (PA) circuit in a 0.18-μm RFCMOS technology. A new mixed-mode ESD simulation-design method and an accurate RF ESD characterization technique are used to minimize the inevitable ESD-induced parasitic effects, which can significantly degrade PA circuit performance. A novel ESD-aware PA design technique is utilized to optimize whole-chip ESD + P A performance. Experiments show that conventional ESD protection can seriously affect the PA circuit, while optimized ESD protection may resolve such a problem. The optimized ESD-protected PA circuit achieves good whole-chip performance, including 5-kV ESD protection, a linear output of 13.5 dBm, a gain of 20.2 dB, and a power-added efficiency of ∼18%, all favorable in the same design category.Index Terms-Electrostatic discharge (ESD), integrated circuit (IC), power amplifier (PA), radio frequency (RF).

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“…One of the most and cost effective linearization techniques to PA nonlinearity is digital predistortion (DPD) [1,2], which has many advantages such as high fidelity, efficiency, and easy realization of adaptive processing [3][4][5]. Moreover, the final purpose of realizing PA linearization digital predistortion needs behavioral modeling precisely, for which Volterra series comes to light.…”

Section: Introductionmentioning

confidence: 99%

An Accurate Complexity-Reduced Simplified Volterra Series for Rf Power Amplifiers

Sun¹,

Yu²,

Liu³

et al. 2014

PIER C

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Abstract-An accurate complexity-reduced simplified Volterra (ACR-SV) series is introduced for RF power amplifiers (PAs). Based on the conventional simplified Volterra (SV) series, it takes memoryless nonlinearity and memory effect into consideration separately, while connected with a nonlinear memory effect (NME) in order to increase accuracy of the model. The proposed ACR-SV model is assessed using a GaN Class-F PA driven by two modulated signals (a WCDMA 1001 signal and a single carrier 16QAM signal with 40 MHz band width). The experimental results in forward modeling and DPD application demonstrate that the proposed ACR-SV model outperforms the memory polynomial (MP) model, the augmented complexity-reduced generalized memory polynomial (ACR-GMP), and the SV model. Compared with the MP model, the ACR-SV model shows a normalized mean square error (NMSE) improvement of 2.61 dB in forward modeling, average adjacent channel power ratio (ACPR) improvement of 3.7/4.2 dB in the DPD application with less 13% number of model coefficients. In comparison with the ACR-GMP model, the ACR-SV model shows NMSE improvement of 1.39 dB, ACPR improvement of 0.7/0.6 dB with comparable number of model coefficients. In contrast with the SV model, the ACR-SV model achieves similar model accuracy, but reduces approximately 53% of coefficients.

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Distortion Mitigation in RF Power Amplifiers Through FPGA-Based Amplitude and Phase Predistortion

Cited by 22 publications

References 12 publications

A Robust Augmented Complexity-Reduced Generalized Memory Polynomial for Wideband RF Power Amplifiers

A Robust Augmented Complexity-Reduced Generalized Memory Polynomial for Wideband RF Power Amplifiers

ESD-Protected Power Amplifier Design in CMOS for Highly Reliable RF ICs

An Accurate Complexity-Reduced Simplified Volterra Series for Rf Power Amplifiers

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