Results 31 to 40 of about 35,890,141 (157)
Microwave and Optical Technology Letters, Volume 64, Issue 4, Page 827-834, April 2022., 2022 Abstract This paper presents a novel magnitude‐selective affine (MSA) based digital predistortion (DPD) method for the performance investigation of multiband 5G new radio (NR) based analog radio over fiber link. The proposed MSA‐DPD method is derived from the canonical piecewise linear (CPWL) based model by employing MSA functions, which can result in ...
Muhammad Usman Hadi +2 more
wiley +1 more source
Transmitter IQ Imbalance Mitigation and PA Linearization in Software Defined Radios [PDF]
Radioengineering, 2022 Radio frequency (RF) power amplifiers (PA) are efficiently linearized by adaptive digital predistortion (DPD). However, performance of DPD is severely degraded in presence of transmitter’s frequency-selective in-phase/quadrature (I/Q) imbalance.
B. Jovanovic, S. Milenkovic
doaj
Scientific Programming, Volume 2022, Issue 1, 2022., 2022 In this paper, an autoregressive spectral estimation using a multilayered neural network is proposed to reduce the nonlinearities of 5G MIMO power amplifiers and increase the signal‐transmitting qualities. The proposed method adopts the two‐sided doubly exponential lattice algorithm to achieve the most suitable estimation for in‐band compensation. Also,
Xin Cao +3 more
wiley +1 more source
Neural Network DPD for Aggrandizing SM-VCSEL-SSMF-Based Radio over Fiber Link Performance
Photonics, 2021 This paper demonstrates an unprecedented novel neural network (NN)-based digital predistortion (DPD) solution to overcome the signal impairments and nonlinearities in Analog Optical fronthauls using radio over fiber (RoF) systems.
Muhammad Usman Hadi +4 more
doaj +1 more source
IET Microwaves, Antennas &Propagation, Volume 15, Issue 12, Page 1577-1593, 7 October 2021., 2021 Abstract This study presents a switchable Doherty power amplifier (S‐DPA) based on dual compensating reactance and adjusted drain voltage with 124% fractional bandwidth (FBW) using single‐input architecture. The proposed S‐DPA can be operated in wideband mode (WB‐MOD) and dual‐band mode (DB‐MOD) with a larger power back‐off region through one‐click ...
Rui‐Jia Liu +6 more
wiley +1 more source
Experimental demonstration of digital predistortion for orthogonal frequency-division multiplexing-radio over fibre links near laser resonance [PDF]
, 2015 Radio over fibre (RoF), an enabling technology for distribution of wireless broadband service signals through analogue optical links, suffers from non-linear distortion. Digital predistortion has been demonstrated as an effective approach to overcome the
Vieira, Luis Carlos, Gomes, Nathan J.
core +1 more source
Wideband IMD3 suppression through negative baseband impedance synthesis
IET Microwaves, Antennas &Propagation, Volume 15, Issue 7, Page 728-743, 10 June 2021., 2021 Abstract This article presents a power amplifier (PA) linearisation approach based on synthesising a negative impedance termination at the baseband frequency. Negative baseband termination has been previously shown to suppress intermodulation distortion (IMD) products in power amplifiers.
William Sear, Taylor W. Barton
wiley +1 more source
On Segmented Predistortion for Linearization of RF Power Amplifiers [PDF]
Radioengineering, 2020 This paper presents a general survey of digital predistortion (DPD) techniques with segmentation. A comparison of global DPD with two segmented approaches namely Vector-Switched DPD and Decomposed Vector Rotation DPD is presented with the support of ...
G. Baudoin
doaj
Electronics Letters, Volume 57, Issue 7, Page 300-302, March 2021., 2021 Abstract This letter presents a non‐linear dynamic behaviour model for characterising the broadband power amplifiers (PAs) by using deep convolution generative adversarial networks (DCGAN). The DCGAN structure is based on the convolution neural network model and combines the generative adversarial networks to improve its linearisation ability of the ...
Rina Su, Taijun Liu, Yan Ye, Gaoming Xu
wiley +1 more source
Digital Predistortion of Wideband Signals with Reduced Complexity Based on Feedback Wiener System
Journal of Telecommunications and Information Technology, 2021 Digital predistortion (DPD) using baseband signals is commonly used for power amplifier linearization. This paper is devoted to this subject and aims to reduce DPD complexity.
Tayeb H. C. Bouazza +2 more
doaj +1 more source