Results 61 to 70 of about 10,056 (178)

Position Accuracy and Distributed Beamforming Performance in WSNs: A Simulation Study

Future Internet
This work investigates the performance of distributed beamforming in Wireless Sensor Networks (WSNs), focusing on the impact of node position errors. A comprehensive simulation testbed was developed to assess how varying network topologies and position ...
José Casca, Prabhat Gupta, Marco Gomes, Vitor Silva, Rui Dinis   +4 more
doaj   +1 more source

Near-Optimal Design for Hybrid Beamforming in mmWave Massive Multi-User MIMO Systems

IEEE Access, 2020
Millimeter wave (mmWave) massive multiple-input multiple-output (MIMO) systems can obtain sufficient beamforming gains to combat severe path loss in signal propagation. The hybrid (analog/digital) beamforming with multiple data streams can be utilized to
Yang Zhang, Jianhe Du, Yuanzhi Chen, Xingwang Li, Khaled M. Rabie, Rupak Kharel   +5 more
doaj   +1 more source

Preprocessing Procedure for Propagation Measurements on MEO Satellite Links

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT This paper presents a software tool designed for preprocessing data from an experimental campaign aimed at characterizing the tropospheric propagation channel using Medium Earth Orbit (MEO) satellites. The collected data provide critical insights into the channel in scenarios involving continuous variations in azimuth and elevation, along with
Marlene Brás, Susana Mota, Armando Rocha   +2 more
wiley   +1 more source

Tracing Three Decades of Low Earth Orbit Satellite Communication Development: A Bibliometric and Main Path Analysis of Network Architectures, Protocol Evolution, and Emerging Intelligent Services

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT Low Earth Orbit (LEO) satellite communication systems have evolved into a critical component of global broadband networks, enabling wide‐area connectivity, IoT services, and intelligent multilayer satellite–terrestrial integration. Despite rapid advancements in constellation deployment, routing mechanisms, resource management, and LEO–5G/6G ...
Wei‐Hao Su, Ya‐Chen Chuang, Long‐Sheng Chen   +2 more
wiley   +1 more source

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

International Journal of Satellite Communications and Networking, EarlyView.
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 ...
Raúl Parada, Victor Monzon Baeza, Carlos Horcajo Fernández de Gamboa, Rocío Serrano Camacho, Carlos Monzo   +4 more
wiley   +1 more source

A Probability‐Aware AI Framework for Reliable Anti‐Jamming Communication

CAAI Transactions on Intelligence Technology, EarlyView.
ABSTRACT Adversarial jamming attacks have increased on communication systems, causing distortion and threatening transmissions. Typical attacks rely on traditional, well‐defined cryptographic protocols and frequency‐hopping techniques. Nevertheless, these techniques become vulnerable when facing intelligent jammers.
Tawfeeq Shawly, Ahmed A. Alsheikhy
wiley   +1 more source

Numerically Optimized Fourier Transform-Based Beamforming Accelerated by Neural Networks

Applied Sciences
Conventional beamforming methods for reconfigurable reflector antennas assume full control over the amplitude and phase of the reflected field. Here, we develop a novel beamforming methodology for reflecting Programmable Metasurfaces (PMS) with ...
Keivan Kaboutari, Abdelghafour Abraray, Stanislav Maslovski   +2 more
doaj   +1 more source

Analysis of Simulated and Measured Indoor Channels for mm-Wave Beamforming Applications

International Journal of Antennas and Propagation, 2018
Ray tracing- (RT-) assisted beamforming, where beams are directly steered to dominant paths tracked by ray tracing simulations, is a promising beamforming strategy, since it avoids the time-consuming exhaustive beam searching adopted in conventional beam
Anders Karstensen, Wei Fan, Fengchun Zhang, Jesper Ø. Nielsen, Gert F. Pedersen   +4 more
doaj   +1 more source

Distant Storms Can Affect Seismic Noise Crustal Monitoring

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract Using seismic noise interferometry to monitor the Earth's interior relies on continuous seismic wavefields produced by stable, invariant sources. In numerous applications, this condition is relaxed, arguing that secondary scattering effects render the late coda source independent.
Jinwu Li, Sin‐Mei Wu, Pilar Sánchez‐Pastor, Laura Ermert, Anne Obermann   +4 more
wiley   +1 more source

Reinforcement Learning-Based Joint Beamwidth and Beam Alignment Interval Optimization in V2I Communications

Sensors
The directional antenna combined with beamforming is one of the attractive solutions to accommodate high data rate applications in 5G vehicle communications.
Jihun Lee, Hun Kim, Jaewoo So
doaj   +1 more source