Results 1 to 10 of about 333,204 (200)

A Combined Elevation Angle and C/N0 Weighting Method for GNSS PPP on Xiaomi MI8 Smartphones [PDF]

open access: yesSensors, 2022
Traditionally, an elevation-angle-dependent weighting method is usually used for Global Navigation Satellite System (GNSS) positioning with a geodetic receiver.
Yanjie Li, Changsheng Cai, Zhenyu Xu
doaj   +4 more sources

Low Elevation Angle Estimation with Range Super-Resolution in Wideband Radar [PDF]

open access: yesSensors, 2020
Height detection of a low elevation angle target is crucial in radar applications. Due to the presence of the multiple path reflections, elevation angle estimation is difficult with conventional narrowband radar waveforms.
Sha Huan   +3 more
doaj   +4 more sources

A Bidirectional Quasi-Endfire Patch Antenna with Low Elevation Angle [PDF]

open access: yesMicromachines
A bidirectional quasi-endfire patch antenna with a low elevation angle has promising applications for wireless communication systems that are vehicle-based, airborne, and shipborne.
Ziling Zhou   +4 more
doaj   +4 more sources

Elevation Angle Characterization for LEO Satellites: First and Second Order Statistics

open access: yesApplied Sciences, 2023
The elevation angle θ is relevant for the Low Earth orbit (LEO) satellite communications since it is always changing its relative position with respect to fixed Earth stations (ES’s), and this affects the link length and received power, PR.
Juan Misael Gongora-Torres   +3 more
doaj   +3 more sources

Evaluation and Correction of Elevation Angle Influence for Coastal GNSS-R Ocean Altimetry

open access: yesRemote Sensing, 2021
The elevation angle influence on coastal GNSS-R ocean code-based altimetry for GPS signals (L1 C/A and L5) and BDS B1 signals is investigated, and the corresponding correction method is presented.
Guodong Zhang   +4 more
doaj   +3 more sources

A Symmetry Evaluation Method, Using Elevation Angle, for Lower Limb Movement Patterns during Sitting-to-Standing

open access: yesApplied Sciences, 2022
In this paper, we propose a method that uses the femoral and tibial elevation angles to quantitatively evaluate the symmetry of lower limb movement during the transition from a sitting position to a standing position.
Kensuke Nakamura, Norihiko Saga
doaj   +1 more source

Radar measurement of target angle elevation over the sea by matrix pencil method taking into account the interference of multipath and thermal noise of radar [PDF]

open access: yesРадиофизика и электроника, 2021
Subject and Purpose. The Matrix Pencil method is investigated as a means of increasing the accuracy of measuring the angles of low-altitude targets above sea level.
Yu.O. Pedenko   +2 more
doaj   +1 more source

Impact Assessment of Elevation Angles on Signal Propagation at VHF and UHF Frequencies for Improved Rural Telephony

open access: yesABUAD Journal of Engineering Research and Development, 2023
Rural telephony is challenging in the remote part of Nigeria due to inadequate telecommunication infrastructure, exorbitant cost of communication systems and poor road network for extension of fiber network.
Ubong Ukommi, Emmanuel Ubom
doaj   +1 more source

The Impact of Elevation Angle on MIMO Capacity [PDF]

open access: yes2006 IEEE International Conference on Communications, 2006
Many channel models for MIMO systems have appeared in the literature. However, with the exception of a few recent results, they are largely focussed on two dimensional (2D) propagation, i.e., propagation in the horizontal plane, and the impact of elevation angle is not considered.
Mansoor Shafi   +4 more
openaire   +1 more source

ROOT-MUSIC MEASUREMENTS OF TARGET ELEVATION ANGLES WITH ACCOUNT OF RADIO WAVE’S PHASE FRONT SPHERICITY [PDF]

open access: yesRadio Physics and Radio Astronomy, 2022
Subject and Purpose. The paper is an effectiveness study of the root-MUSIC technique as applied to elevation angle measurements of low-altitude radar targets over the sea, specifically with account of the radio waves’ phase front sphericity.
Yu. O. Pedenko
doaj   +1 more source

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