Results 81 to 90 of about 8,525,169 (240)

Dynamic Performance Enhancement of a High‐Agility Hypersonic Mechanical System via a Learning‐Augmented Robust Control Architecture

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT The design of control systems for high‐agility mechanical systems operating in extreme environments is a significant challenge in nonlinear dynamics. This paper addresses the complex dynamic control problem of a hypersonic interceptor, modeled as a multi‐input multi‐output (MIMO) mechanical system characterized by strong aerodynamic cross ...
Mohammad Mahdi Soori, Seyed Hossein Sadati   +1 more
wiley   +1 more source

Low‐Complexity Hybrid Beamforming for LEO Satellites: Beam Update Rate Analysis and Advanced Adaptive Precoding

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT Low Earth Orbit (LEO) satellite constellations offer unprecedented opportunities for global broadband connectivity but pose significant beamforming challenges due to rapid platform motion and stringent onboard hardware constraints. Fully digital architectures, while optimal in theory, remain impractical for satellite payloads, motivating ...
Mohammad Momani, Thomas Delamotte, Andreas Knopp   +2 more
wiley   +1 more source

The Cell-Free Networks Enhancement by Relays Implementa-tion [PDF]

International Journal of Telecommunications, 2023
Data rates that users can sustain in both uplink and downlink can be increased because of multiple input multiple output (MIMO) technology. MIMO is therefore a new technology for 5G networks and beyond.
doaj   +1 more source

Optimal Bilinear Equalizer for Cell-Free Massive MIMO Systems Over Correlated Rician Channels [PDF]

IEEE Transactions on Signal Processing
In this paper, we explore the low-complexity optimal bilinear equalizer (OBE) combining scheme design for cell-free massive multiple-input multiple-output networks with spatially correlated Rician fading channels.
Zhe Wang, Jia-Yi Zhang, Emil Björnson, D. Niyato, Bo Ai   +4 more
semanticscholar   +1 more source

Quantized Massive MU-MIMO-OFDM Uplink

, 2016
Coarse quantization at the base station (BS) of a massive multi-user (MU) multiple-input multiple-output (MIMO) wireless system promises significant power and cost savings.
Durisi, Giuseppe,, Studer, Christoph, Studer, Christoph,, Durisi, Giuseppe   +3 more
core   +1 more source

Radio‐Frequency Front‐End‐Free Hybrid Code‐Division and Space‐Division Wireless Multiplexing Using Space‐Time‐Coding Metasurface

Nanophotonics, Volume 15, Issue 17, 11 September 2026.
This work constructs a radio‐frequency front‐end‐free hybrid code‐division and space‐division‐multiplexing wireless communication system built on programmable space‐time‐coding metasurfaces. Orthogonal pseudo‐random codes reliably separate overlapped multistream signals that share identical frequency, time, and spatial resources.
Yuzhen Chen, Xiaoyi Wang, Guo‐Min Yang, Ya‐Qiu Jin   +3 more
wiley   +1 more source

Next-Generation Multiple Access With Cell-Free Massive MIMO [PDF]

Proceedings of the IEEE
To meet the unprecedented mobile traffic demands of future wireless networks, a paradigm shift from conventional cellular networks to distributed communication systems is imperative.
M. Mohammadi, Z. Mobini, H. Ngo, M. Matthaiou   +3 more
semanticscholar   +1 more source

Fundamental Challenges, Physical Implementations, and Integration Strategies for Ising Machines in Large‐Scale Optimization Tasks

Advanced Electronic Materials, Volume 12, Issue 17, 7 September 2026.
Ising machines are emerging as specialized hardware solvers for computationally hard optimization problems. This review examines five major platforms—digital CMOS, analog CMOS, emerging devices, coherent optics, and quantum systems—highlighting physics‐rooted advantages and shared bottlenecks in scalability and connectivity.
Hyunjun Lee, Joon Pyo Kim, Sanghyeon Kim
wiley   +1 more source

The state of the art in beyond 5G distributed massive multiple-input multiple-output communication system solutions [version 1; peer review: 1 approved, 2 approved with reservations]

Open Research Europe, 2022
Beyond fifth generation (5G) communication systems aim towards data rates in the tera bits per second range, with improved and flexible coverage options, introducing many new technological challenges in the fields of network architecture, signal ...
F. Ponzini, A. Filippi, U. Johannsen, D. Kruglov, E. Meyer, R. Argaez-Ramirez, M. Krivic, A. Briseno Ojeda, Y. Zhang, K. Alekseev, K. Smirnova, B. Cimbili, M. Safari Mugisho, Y. Dang, N. Farid, M. Ensan, M. Shahid, H. Bao, J. Banar, U. Gustavsson, M. Matters-Kammerer, T. Zwick, F. Demuynck, C. Fager, M. Acar, M. Ivashina, M. van der Heijden, M. Hasselblad, D. Caratelli, K. Eriksson, A.B. Smolders, M. Tanveer, C. Ulusoy, R. Maaskant, M. Johannson, D. Floriot, R. Quay, L.A. Bronckers, M. Bao, M.C. van Beurden, J. Fridén, C. Kolitsidas, B.P. de Hon, Hamdi Joudeh, D. Blanco, T. Eriksson, F.M.J. Willems   +46 more
doaj   +1 more source

Integrated LEO Constellation and In‐Cabin Distribution System for Continuous Aircraft 5G Connectivity

International Journal of Satellite Communications and Networking, Volume 44, Issue 5, Page 594-606, September/October 2026.
ABSTRACT The integration of low Earth orbit (LEO) satellite constellations with commercial aircraft communication systems presents critical challenges in maintaining continuous connectivity during dynamic flight conditions. Current geostationary satellite systems suffer from high round‐trip latency ( > 500 ms) and inadequate coverage at high latitudes,
Raúl Parada, Victor Monzon Baeza, Carlos Horcajo Fernández de Gamboa, Rocío Serrano Camacho, Carlos Monzo   +4 more
wiley   +1 more source