Results 21 to 30 of about 14,034 (233)
Multibeam by Metasurface Antennas
IEEE Transactions on Antennas and Propagation, 2017 We explore various possibilities for designing multibeam antennas using a single metasurface (MTS) aperture. Both single-source and multisource feeding schemes are considered. For the single-source case, two approaches are investigated. In the first one, the MTS aperture is divided into several angular sectors, each one devoted to the formation of a ...
David Gonzalez-Ovejero +3 more
openaire +3 more sources
MIMO Applications for Multibeam Satellites [PDF]
IEEE Transactions on Broadcasting, 2019 Accepted for publication in IEEE Transactions on ...
Robert T. Schwarz +3 more
openaire +2 more sources
Journal of Marine Science and Engineering, 2021 Predictive mapping of seabed sediments based on multibeam bathymetric (BM), and backscatter (BS) data is effective for mapping the spatial distribution of the substrate.
Wei Xu +3 more
doaj +1 more source
The Methanol Multibeam Survey [PDF]
Proceedings of the International Astronomical Union, 2012 A purpose built 7-beam methanol receiver, installed on the Parkes Radio Telescope, was used to survey the Galactic plane for newly forming high mass stars, pinpointed by strong methanol maser emission at 6.7 GHz. The Methanol Multibeam (MMB) survey observed over 60% of the Galactic plane, detecting close to 1000 sources.
Green, J. A. +1 more
openaire +3 more sources
Юг России: экология, развитие, 2017 Objectives. Experimental trial of using the scientific multibeam echosounder installed on the research vessel “Issledovatel Kaspiya” was conducted in the Caspian Sea with the purpose to detect fish in a wild field of view.Methods.
G. M. Abdurakhmanov +6 more
doaj +1 more source
Multibeam bathymetry data of the western part of the Romanche Trench (Equatorial Atlantic)
Data in Brief, 2021 We present the multibeam bathymetry data of the western part of the Romanche Trench (Equatorial Atlantic) which is the main natural corridor that regulates inflow of Antarctic Bottom Water into the eastern basin of the Atlantic Ocean.
Mariia V. Kapustina +2 more
doaj +1 more source
Seabed sediments (grain size) of Nordland VI, offshore north Norway
Journal of Maps, 2017 This paper presents a seabed sediments (grain size) map of the Nordland VI area (25,000 km2) off the Lofoten islands, north Norway. The map is based on multibeam echosounder data (bathymetry and backscatter), visual analysis of 215 video transects (each ...
Valérie K. Bellec +5 more
doaj +1 more source
Hybrid Machine Learning and CUBE Method for Multibeam Data Cleaning [PDF]
TransNavMultibeam data contains different types of errors that are classified as systematic errors, random errors and gross errors (outliers). Accurate bathymetric base surface production requires efficient cleaning methods to detect and reject the outliers. The
Mohammed El-Diasty +2 more
doaj +1 more source
Adaptive beamforming for large arrays in satellite communications systems with dispersed coverage [PDF]
, 2011 Conventional multibeam satellite communications systems ensure coverage of wide areas through multiple fixed beams where all users inside a beam share the same bandwidth. We consider a new and more flexible system where each user is assigned his own beam,
Larue de Tournemine, Cécile +5 more
core +1 more source
Challenges in the Multibeam Antennas
, 2018 In this project, we are trying to shed light on various aspects of the antenna arrays. Special focus is on solving the problems related to multibeam antennas. One traditional application of the multibeam antennas is sum and difference patterns.
Morteza Shahpari
core +3 more sources