Results 51 to 60 of about 313,766 (176)
Robust approaches to remote calibration of a transmitting array [PDF]
, 2010 We consider the problem of estimating the gains and phases of the RF channels of a M-element transmitting array, based on a calibration procedure where M orthogonal signals are sent through M orthogonal beams and received on a single antenna.
Bidon, Stéphanie +2 more
core +1 more source
Performance Evaluation of Distributed-Antenna Communications Systems Using Beam-Hopping
, 2005 Digital beamforming (DBF) techniques are capable of improving the performance of communications systems significantly. However, if the transmitted signals are conflicted with strong interference, especially, in the direction of the transmitted beams ...
Yang, L.-L., Zhu, J., Hu, H.
core +1 more source
Redefining Optimal Coverage Path Planning for FLS‐Equipped AUVs With Deep Reinforcement Learning
Journal of Field Robotics, Volume 43, Issue 6, Page 3617-3632, September 2026.ABSTRACT Autonomous Underwater Vehicles (AUVs) have emerged as indispensable tools for a variety of subsea tasks, from habitat monitoring and seabed mapping to infrastructure inspection and mine countermeasures. A fundamental challenge in this field is Coverage Path Planning (CPP), the problem of ensuring complete and efficient area coverage.
Lorenzo Cecchi +3 more
wiley +1 more source
Reviews of Geophysics, Volume 64, Issue 3, September 2026.Abstract Understanding the coastal zone of the Antarctic Ice Sheet (AIS), where it interacts with the Southern Ocean and warmer air masses, is crucial for predicting Antarctica's influence on the global climate and sea level. This region has multiple tipping mechanisms that could trigger large, rapid, and potentially irreversible changes in the AIS ...
Kenichi Matsuoka +79 more
wiley +1 more source
Multibeam antenna study, phase 1 [PDF]
, 1972 A multibeam antenna concept was developed for providing spot beam coverage of the contiguous 48 states. The selection of a suitable antenna concept for the multibeam application and an experimental evaluation of the antenna concept selected are described.
Bellamy, J. L.
core
Reconfigurable tri-band H-shaped antenna with frequency selectivity feature for compact wireless communication systems [PDF]
, 2011 This is the post-print version of the Article. The published version can be accessed from the link below - Copyright @ 2011 IETThis study presents an H-shaped reconfigurable antenna for wireless applications.
AbuTarboush, HF +14 more
core +1 more source
Beam scanning one-dimensional leaky-wave antenna
, 2022 Although the beam of a leaky-wave antenna (LWA) scans with frequency, steering through the broadside is usually challenging. Various methods have been developed to overcome this limitation.
Karmokar, D.K.
core +1 more source
SensorsThis article presents a 4-way 2-D butler matrix (BM)-based beamforming network (BFN) using a multilayer substrate broadside coupled stripline (BCS). To achieve the characteristics of a compact, wide-bandwidth, high-gain phased array, a BCS coupler is ...
Jean Temga +2 more
doaj +1 more source
A Beam-Split Metasurface Antenna for 5G Applications
IEEE Access, 2022 This article presents a hybrid metasurface split beam antenna for fifth-generation (5G) mobile applications at 3.5 GHz. Multi-beam antennas with high directivity are required for a 5G mobile network. It can be achieved by having an array antenna.
Tamara Z. Fadhil +4 more
doaj +1 more source
River Sand and Gravel Mining: Global Drivers, Impacts, and Pathways for Sustainable Management
Reviews of Geophysics, Volume 64, Issue 3, September 2026.Abstract River sand and gravel are mined worldwide at volumes that now rival their natural replenishment, yet quantitative knowledge of this mining activity and its consequences lags far behind many other global environmental pressures. We synthesize 411 peer‐reviewed studies published since 1974 within a new Driver‐to‐Management Pathway for ...
Edward Park +25 more
wiley +1 more source