Results 41 to 50 of about 333,204 (200)
IET Radar, Sonar & Navigation, 2022 The multipath effect deteriorates the performance of low elevation target altitude estimation with a ubiquitous radar strongly, especially in complex terrain environments in which multiple reflection paths exist simultaneously.
Rui Guo +4 more
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Gait Analysis of Elderly and Young People Based on Joint Angles and Positions
Applied SciencesFor the elderly, the motor function of walking is significant for the maintenance and improvement of their quality of life (QOL). Walking patterns have been postulated to be associated with a decline in walking ability. The objective of this study was to
Mizuki Saga, Norihiko Saga
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Remote Sensing, 2021 In a low-angle tracking situation, estimating the elevation angle is challenging due to the entrance of the multipath signals in the antenna’s main lobe.
Hossein Darvishi +3 more
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A low sidelobe asymmetric beam antenna for high altitude platform communications [PDF]
, 2004 In a communications network served by a high altitude platform, the antenna beams illuminating each cell require minimized sidelobe powers. Asymmetric beams are advantageous so that cell footprints remain circular.
Thornton, J.
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A unified low elevation angle scintillation model [PDF]
2011 IEEE International Symposium on Antennas and Propagation (APSURSI), 2011 Enabling communications at very low elevation can lengthen the pass duration between a satellite and a ground station, which in turn can increase the amount of data return and possibly reduce the number of required supporting ground stations. Link performance, especially at very low angles and high frequencies, depends heavily on terrain, atmosphere ...
Lee, Charles H. +3 more
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Impact of Elevation Angle on Multi-Beam LEO Satellite Communication Systems
IEEE AccessCompared to well-established geosynchronous equatorial orbit (GEO) satellite networks, low Earth orbit (LEO) satellites bring new challenges to overcome, such as the distortion of the satellite footprint with varying elevation angle.
Agnes Fastenbauer +3 more
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Beam Split Algorithm for Height Measurement With Meter-Wave MIMO Radar
IEEE Access, 2021 In order to improve the feasibility of low-elevation height measurement for meter-wave multiple-input multiple-output (MIMO) radar, a virtual sub-array-level beam splitting low-elevation height measurement algorithm is proposed.
Chen Chen +3 more
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Simulation of Focusing Effect of Traveling Ionospheric Disturbances on Meter-Decameter Solar Dynamic Spectra [PDF]
, 2018 For the first time we present simulation results of the focusing effect of the ionospheric plasma density irregularities, namely, Medium Scale Traveling Ionospheric Disturbances (MSTIDs), on solar radio emission by applying a ray-tracing method to the ...
Chen, Yao +4 more
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Teaching of Angle of Elevation by Integrating Angle Measurement in Ancient Egyptian Mathematics
International Journal of Engineering and Technology, 2018 The aim of this study is to stimulate reflections and determine the effects of teaching mathematics by integrating its history through Lesson Study. Lesson Study was utilized as a process to delve into the possible outcomes of incorporating history of mathematics in teaching angle of elevation to 15 freshmen college students taking BS Air ...
Steffan-Mae Juquiana +4 more
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Photonics, 2022 Ultraviolet (UV) communication is considered an effective complement to traditional wireless communication. However, the scattering models of existing non-line-of-sight (NLOS) UV, which are complex, are difficult to combine with the test.
Axin Du +5 more
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