Linearization Technologies for Broadband Radio-Over-Fiber Transmission Systems
Photonics, 2014 Linearization technologies that can be used for linearizing RoF transmission are reviewed. Three main linearization methods, i.e. electrical analog linearization, optical linearization, and electrical digital linearization are presented and compared ...
Xiupu Zhang +3 more
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Digital predistortion of RF amplifiers using baseband injection for mobile broadband communications [PDF]
, 2014 Radio frequency (RF) power amplifiers (PAs) represent the most challenging design parts of wireless transmitters. In order to be more energy efficient, PAs should operate in nonlinear region where they produce distortion that significantly degrades the ...
Cabarkapa, M.
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Sparse Flexible Reduced-Volterra Model for Power Amplifier Digital Pre-Distortion
IEEE Access, 2022 The Volterra framework plays an important role in digital pre-distortion (DPD) for power amplifier (PA) linearization. In practice, the full-Volterra (FV) model is avoided due to the so-called curse of dimensionality, which has motivated several Volterra
Cyro S. Hemsi, Cristiano M. Panazio
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Linearization of power amplifiers by baseband digital predistortion for OFDM transmitters [PDF]
, 2008 For the signals with high peak-to-average ratio (PAR), such as WiMax OFDM, power amplifiers need to operate in a compression mode. It results in a non-linear distortion of the output signal.
Budimir, D. +5 more
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IEEE Access, 2019 The method of function approximation to improve index accuracy of the lookup table (LUT) of digital predistortion (DPD) is proposed in this paper. The algorithm utilizes Taylor Series method for LUT approximation.
Jijun Ren
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Comparison of single- and double-sided pulse width modulated signals with non-linear predistortion
, 2012 Class D amplifiers are based on a low-bit pulse width modulated (PWM) signal reconstructed through the lowpass characteristic of the loudspeaker. To create a PWM signal, a non-linear conversion from a standard pulse code modulated (PCM) signal has to be ...
Weiss, Stephan +7 more
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Hybrid Digital/Analog Predistorter Architecture With Enhanced Robustness to Hardware Impairments
IEEE AccessIn this paper, a hybrid predistortion architecture that allies the benefits of digital and analog predistortion techniques is investigated. This Hybrid Digital/Analog Predistorter (H-DAPD) uses a low order memory polynomial as a baseband digital ...
Majid Ahmed, Oualid Hammi
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The effects of digital predistortion in a CO-OFDM system – a stochastic approach [PDF]
, 2020 Digital predistortion is topic of significant interest in telecommunications – both in the wireless radio field and, more recently, in photonics. In the present letter, the authors undertake a sensitivity analysis of various digital predistortion ...
Sime, Jacqueline, E +8 more
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Effect of the Base-band Measurement Setup Errors on DPD Performance and Elimination Procedure
Advanced Electromagnetics, 2017 In this study, the effect of base-band measurement setup errors on DPD performance was investigated and a calibration procedure is developed to eliminate the measurement errors. A base-band measurement setup is prepared at laboratory with instruments and
A. H. Yüzer, E. B. Şanlı
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Distortion improvement of power amplifiers with digital predistortion
, 2009 This paper presents an optimized digital predistortion (DPD) technique based on iterative injecting of distortion components into the baseband signal.
Budimir, D., Bondar, D.
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