A robust multi‐sampling rate digital predistortion for ultra‐broadband power amplifiers
Sign Up to like & getrecommendations! Published in 2019 at "Microwave and Optical Technology Letters"
DOI: 10.1002/mop.32116
Abstract: In this letter, a robust multisampling rate digital predistortion (DPD) scheme is proposed to linearize ultra‐broadband power amplifiers (PAs) under the limited DAC sampling rate. In the ultra‐broadband scenarios, it is no longer affordable to… read more here.
Keywords: ultra broadband; digital predistortion; rate; rate digital ... See more keywords
Digital predistortion for concurrent dual-band transmitter using a 2D-LUT based Hammerstein architecture
Sign Up to like & getrecommendations! Published in 2017 at "Analog Integrated Circuits and Signal Processing"
DOI: 10.1007/s10470-016-0893-z
Abstract: Digital predistortion has been proved to be an effective remedy for the nonlinear distortion in radio-frequency power amplifier. Unfortunately, conventional digital predistorters (DPDs) developed for single-band transmitters can not be directly applied to concurrent dual-band.… read more here.
Keywords: based hammerstein; lut based; dual band; concurrent dual ... See more keywords
A novel model for digital predistortion based on a gravitational search algorithm for linearization of transmitters in LTE networks
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Computational Electronics"
DOI: 10.1007/s10825-019-01413-4
Abstract: A high-performance model with a gravitational search algorithm (GSA)-based generalized parallel two-box (GPTB) structure is suggested for digital predistortion in modern transmitters exhibiting memory effects, where the GSA is applied to identify the minimum dimension… read more here.
Keywords: algorithm; gravitational search; search algorithm; model ... See more keywords
An enhanced digital predistortion algorithm based on polynomial model identification
Sign Up to like & getrecommendations! Published in 2018 at "Science China Information Sciences"
DOI: 10.1007/s11432-017-9420-y
Abstract: To improve the accuracy of the nonlinear distortion correction for the radio frequency (RF) power amplifier (PA), it is necessary to precisely obtain the reverse function of the PA nonlinear model. However, the direct inversion… read more here.
Keywords: nonlinear model; direct inversion; method; model ... See more keywords
Digital Predistortion Utilizing Over-the-Air Feedback for Phased Arrays
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Access"
DOI: 10.1109/access.2021.3063364
Abstract: In this paper, an efficient digital predistortion (DPD) architecture utilizing over-the-air (OTA) feedback is presented to linearize phased array transmitters. It places one additional observation antenna (OA) in the far field to capture the combined… read more here.
Keywords: array; steering angle; utilizing air; phased array ... See more keywords
Digital Predistortion of Nonlinear Power Amplifier Based on Improved Spline Adaptive Filtering Method
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Access"
DOI: 10.1109/access.2022.3223124
Abstract: To improve the modeling accuracy and digital predistortion compensation effect, this paper proposed a kind of polynomial based spline adaptive filter (SAF) power amplifier (PA) behavioral modeling method. The proposed model can solve the shortcomings… read more here.
Keywords: spline adaptive; digital predistortion; power amplifier; model ... See more keywords
Novel Post-Weighting Digital Predistortion Structures for Hybrid Beamforming Systems
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Communications Letters"
DOI: 10.1109/lcomm.2021.3120648
Abstract: We propose a new method to tackle the predistortion problem for the hybrid beamforming structure of Millimeter-Wave (MM-Wave) Massive MIMO in 5G communication systems in order to widen the linearized angle of beams without any… read more here.
Keywords: hybrid beamforming; digital predistortion; predistortion; novel post ... See more keywords
An Improved Digital Predistortion Mechanism via Joint Baseband and Radio Frequency Optimization
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Communications Letters"
DOI: 10.1109/lcomm.2021.3132685
Abstract: Predistortion techniques can be categorized into digital predistortion (DPD) and analog predistortion (APD), which are always implemented separately in their own domains. The baseband-domain mean square error (MSE) is the design target of DPD, and… read more here.
Keywords: digital predistortion; baseband; dpd; improved digital ... See more keywords
In-Band Digital Predistortion for Concurrent Dual-Broadband Phased Array Transmitters
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Microwave and Wireless Components Letters"
DOI: 10.1109/lmwc.2019.2902725
Abstract: This letter proposes a novel in-band digital predistortion technique to linearize the concurrent dual-broadband phased array transmitters, which can remove the in-band distortion with reduced processing bandwidth compared to conventional methods. Based on $1\times 4$… read more here.
Keywords: dual broadband; band digital; concurrent dual; broadband phased ... See more keywords
Signed Orthogonal Regressor Algorithm for Digital Predistortion of Power Amplifiers
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Microwave and Wireless Components Letters"
DOI: 10.1109/lmwc.2021.3076392
Abstract: Digital predistortion (DPD) of broadband power amplifiers (PAs) requires a large number of parameters to compensate for the severe nonlinear distortion, which may cause considerable computational complexity in the DPD parameter identification process. To solve… read more here.
Keywords: orthogonal regressor; signed orthogonal; regressor algorithm; power amplifiers ... See more keywords
Beyond the Moore–Penrose Inverse: Strategies for the Estimation of Digital Predistortion Linearization Parameters
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Microwave Magazine"
DOI: 10.1109/mmm.2020.3023220
Abstract: Digital predistortion (DPD) is the linearization technique most often used to cope with the inherent tradeoff between linearity and efficiency in power amplifiers (PAs). Adaptation is needed to optimize DPD performance. This article reviews strategies… read more here.
Keywords: linearization; predistortion; moore penrose; penrose inverse ... See more keywords