Results 81 to 90 of about 6,839,717 (234)

Monitoring for Rare Events in a Wireless Powered Communication mmWave Sensor Network

Sensors, 2020
The use of a wireless sensor network to monitor an area of interest for possible hazardous events has become a common practice. The difficulty of replacing or recharging sensor batteries dictates the use of energy harvesting as a means to extend the ...
Michael Koutsioumpos, Evangelos Zervas, Efstathios Hadjiefthymiades, Lazaros Merakos   +3 more
doaj   +1 more source

A Photonic Beamforming Network Based on Phase Shifters for Microwave Wide-Band Applications

International Conference on Transparent Optical Networks, 2019
In this paper, the performance of a photonic beamforming network based on phase shift for microwave applications is analysed. The proposed beamforming network elements are realised as Si-photonic integrated circuits, exhibiting large phase shift (> 360°)
G. Serafino, B. Hussain, C. Porzi, M. Chiesa, V. Toccafondo, A. Bogoni, P. Ghelfi   +6 more
semanticscholar   +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

Automatic Monitor-Based Tuning of an RF Silicon Photonic 1X4 Asymmetric Binary Tree True-Time-Delay Beamforming Network

Journal of Lightwave Technology, 2018
Photonic beamforming networks are promising candidates to achieve power-efficient transmission in future cellular communication systems. However, sensitivity to process and temperature variations necessitates an automatic calibration solution to enable ...
Gihoon Choo, C. Madsen, S. Palermo, K. Entesari   +3 more
semanticscholar   +1 more source

CLEAR Interference Cancellation in a Wideband Dual‐Channel Receiver for Independent Satellite Multi‐Connectivity Links

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT In this paper, the correlation learning estimation and adaptive reduction (CLEAR) of interference, an adaptive, blind and transparent interference compensation method applied in a wideband dual‐channel receiver, is studied for a pair of independent satellite multi‐connectivity links, using the same carrier frequency and signal bandwidth in use
Svilen Dimitrov
wiley   +1 more source

Beamforming Network Optimization for Reducing Channel Time Variation in High-Mobility Massive MIMO

IEEE Transactions on Communications, 2018
Communications in high-mobility environments have received a lot of attention recently. In this paper, fast time-varying channels for massive multiple-input multiple-output (MIMO) systems are addressed. We derive the exact channel power spectrum density (
Yinghao Ge, Weile Zhang, F. Gao, Shun Zhang, Xiaoli Ma   +4 more
semanticscholar   +1 more source

Dynamic Cell Division for Interference Management in Satellite Direct‐to‐Cell Systems

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT Direct‐to‐cell (D2C) connectivity enables future non‐terrestrial networks to provide service directly to standard terrestrial user equipment (UE) when terrestrial networks (TN) are unavailable. In this work, the satellite system is considered as a secondary network that supplements existing TN coverage while minimizing interference to the ...
Satya Chan, Hee Wook Kim, Bon‐Jun Ku, Daesub Oh   +3 more
wiley   +1 more source

Ultra-Low-Loss Silicon Nitride Optical Beamforming Network for Wideband Wireless Applications

IEEE Journal of Selected Topics in Quantum Electronics, 2018
Three optical ring resonator (ORR)-based integrated ultra-low-loss silicon nitride $\text{1}\times \text{4}$ optical beamforming networks (OBFNs) for millimeter-wave (mmW) beamsteering are reported.
Yuan Liu, A. Wichman, B. Isaac, J. Kalkavage, E. Adles, T. Clark, J. Klamkin   +6 more
semanticscholar   +1 more source

Complex MIMO RBF Neural Networks for Transmitter Beamforming over Nonlinear Channels

Sensors, 2020
The use of beamforming for efficient transmission has already been successfully implemented in practical systems and is absolutely necessary to even further increase spectral and energy efficiencies in some configurations of the next-generation wireless ...
Kayol Soares Mayer, Jonathan Aguiar Soares, Dalton Soares Arantes   +2 more
doaj   +1 more source

Beyond 5G and Non‐terrestrial Network (NTN) Integrated Architecture: Access Challenges for Expanding Artificial Intelligence of Things (AIoT)

International Journal of Satellite Communications and Networking, Volume 44, Issue 4, Page 378-393, July/August 2026.
ABSTRACT This study analyzes the architecture of the beyond 5G‐NTN (Non‐terrestrial Network) integrated network and presents the technical, legal, and regulatory challenges and considerations for expanding the Artificial Intelligence of Things (AIoT) ecosystem.
Byung Woon Kim, Ga Eun Choi
wiley   +1 more source