Results 61 to 70 of about 35,253,731 (205)

Digital Predistorter Implementation for Wideband Power Amplifiers in New Generation Wireless Systems Based on a Low‐Complexity Volterra Series Model

International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, Volume 38, Issue 5, September/October 2025.
ABSTRACT In this article, we provide a novel, expanded, and adapted pruning approach for the Simplified Volterra Series (SVS) model that makes it applicable to a wider range of Power Amplifiers (PAs). The proposed Modified SVS (MSVS) model is then applied in a Digital Predistortion (DPD) architecture to linearize a 25 W Gallium Nitride (GaN) RF PA.
Haithem Rezgui, Ghalid Abib, Fatma Rouissi, Adel Ghazel   +3 more
wiley   +1 more source

Nonlinearity Mitigation of Multi-Level Optical Transmission Using Spectrum-Split Digital Pre-Distortion

IEEE Photonics Journal, 2020
To overcome the frequency-dependent nonlinear characteristics of a directly modulated laser (DML) in a multi-level optical transmission, the spectrum-split digital pre-distortion (SS-DPD) is proposed and experimentally demonstrated to mitigate the ...
Gyu-Tai Lim, Hyoung-Joon Park, Sang-Kook Han   +2 more
doaj   +1 more source

Performance Analysis of MIMO Links With Non‐Isolated Active Antenna Arrays

Microwave and Optical Technology Letters, Volume 67, Issue 8, August 2025.
ABSTRACT In this paper, we analyze the performance of non‐isolated active arrays in a multiple‐input multiple‐output (MIMO) system. When ferromagnetic‐type isolators are removed in the transmitter (Tx) chains, the antenna mutual coupling will dynamically change the load impedance seen by the power amplifiers (PAs) at their outputs, which subsequently ...
Jiayu Hou, Haijun Fan, Yuan Ding, George Goussetis   +3 more
wiley   +1 more source

Practically Feasible Closed-Loop Digital Predistortion for VCSEL-MMF-Based Radio-over-Fiber Links [PDF]

Radioengineering, 2020
The article demonstrates a novel Digital Predistortion (DPD) architecture for Mobile Front Haul links for the advanced Long-Term Evolution (LTE) and upcoming 5G networks.
M. U. Hadi, J. Nanni, O. Venard, G. Baudoin, J. L. Polleux, G. Tartarini   +5 more
doaj  

Programmable photonic unitary circuits for light computing

Nanophotonics, Volume 14, Issue 10, Page 1429-1449, May 2025.
Abstract Unitarity serves as a fundamental concept for characterizing linear and conservative wave phenomena in both classical and quantum systems. Developing platforms that perform unitary operations on light waves in a universal and programmable manner enables the emulation of complex light–matter interactions and the execution of general‐purpose ...
Kyuho Kim, Kunwoo Park, Hyungchul Park, Sunkyu Yu, Namkyoo Park, Xianji Piao   +5 more
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  

Binary Search‐Based Division (BSBD): A Technique for Efficient Division in Hardware

Journal of Electrical and Computer Engineering, Volume 2025, Issue 1, 2025.
The division techniques play a key role in several computer‐implemented algorithms and applications; regrettably, they impose significant implementation constraints that hinder parallelization. The proposed binary search‐based division (BSBD) technique is inherited from the variable latency dividers, which have the potential to adjust the quotient bit ...
Mustafa Muhammed Hendawi, Nahla Elazab Elashker, Mervat Mohamed Adel Mahmoud, Shaimaa ElSayed Ibrahim, Eman Mohamed Mahmoud, Arpan Hazra   +5 more
wiley   +1 more source

Intra‐scan RF power amplifier drift correction

Magnetic Resonance in Medicine, Volume 92, Issue 2, Page 645-659, August 2024.
Abstract Purpose The drift in radiofrequency (RF) power amplifiers (RFPAs) is assessed and several contributing factors are investigated. Two approaches for prospective correction of drift are proposed and their effectiveness is evaluated. Methods RFPA drift assessment encompasses both intra‐pulse and inter‐pulse drift analyses.
Ali Aghaeifar, Dario Bosch, Rahel Heule, Sydney Williams, Philipp Ehses, Franck Mauconduit, Klaus Scheffler   +6 more
wiley   +1 more source

Prototype Implementation of Two Efficient Low-Complexity Digital Predistortion Algorithms

EURASIP Journal on Advances in Signal Processing, 2008
Predistortion (PD) lineariser for microwave power amplifiers (PAs) is an important topic of research. With larger and larger bandwidth as it appears today in modern WiMax standards as well as in multichannel base stations for 3GPP standards, the ...
Timo I. Laakso, Markus Rupp, Peter Brunmayr, Mei Yen Cheong, Ernst Aschbacher   +4 more
doaj   +1 more source

Long baseline bistatic radar imaging of tumbling space objects for enhancing space domain awareness

IET Radar, Sonar &Navigation, Volume 18, Issue 4, Page 598-619, April 2024.
This paper describes long baseline bistatic radar measurements using the Millstone Hill Radar (MHR) in the USA, the Tracking and Imaging Radar (TIRA) in Germany, multiple receivers of the e‐MERLIN array in the United Kingdom, and the Westerbork Synthesis Radio Telescope (WSRT) in the Netherlands.
Alexander Serrano, Alexander Kobsa, Faruk Uysal, Delphine Cerutti‐Maori, Selenia Ghio, Andrew Kintz, Robert L. Morrison Jr., Sarah Welch, Philip van Dorp, Gregory Hogan, Simon Garrington, Cees Bassa, Chris Saunders, Marco Martorella, Miguel Caro Cuenca, Isaac Lowe   +15 more
wiley   +1 more source