Results 1 to 10 of about 336 (94)
HDOP and VDOP Analysis in an Ideal Placement Environment for Dual GNSSs [PDF]
Sensors, 2022 Increasing the number of satellites in a global navigation satellite system (GNSS) improves the positioning accuracy and increases availability. However, it reduces the positioning accuracy improvement rate and increases the calculation loads, which can ...
JinHyeok Jang +3 more
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Measurement Along the Path of Unmanned Aerial Vehicles for Best Horizontal Dilution of Precision and Geometric Dilution of Precision [PDF]
SensorsIn the zenith-horizon placement for achieving minimum geometric dilution of precision (GDOP), one access node or sensor is positioned along the z-axis, while the remaining nodes are placed symmetrically on a three-dimensional (3D) cone.
Yanwu Ding +3 more
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ISPRS International Journal of Geo-Information, 2021 The positioning accuracy of a ground-based system in an indoor environment is closely related to the geometric configuration of pseudolites. This paper presents a simple closed-form equation for computing the weighted horizontal dilution of precision ...
Xinyang Zhao +4 more
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LoRa Network Planning and Deployment: A Terrestrial Navigation Application
IEEE Access, 2021 Long Range (LoRa) is a popular low power wide area network (LPWAN) technology which operates in the Industrial, Scientific and Medical (ISM) frequency band transmitting information over ranges in excess of 20 km and 5 km in rural and urban landscapes ...
Lone Kolobe +2 more
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Analysis of a HAPS-Aided GNSS in Urban Areas Using a RAIM Algorithm
IEEE Open Journal of the Communications Society, 2023 The global averaged civilian positioning accuracy is still at meter level for all existing Global Navigation Satellite Systems (GNSSs), and the performance is even worse in urban areas. At lower altitudes than satellites, high altitude platform stations (
Hongzhao Zheng +2 more
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UWB Base Station Deployment Optimization Method Considering NLOS Effects Based on Levy Flight-Improved Particle Swarm Optimizer [PDF]
SensorsThe ultra-wideband (UWB) base station (BS) deployment pattern seriously affects mobile tag positioning accuracy, but the traditional classical deployment methods, such as rectangular and diamond deployment, cannot take into account the influence of non ...
Shengliang Wang +4 more
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Mathematics, 2023 User equipment (UE) location estimation in emerging 5G/B5G/6G Ultra-Dense Networks (UDNs) is a breakthrough technology in future wireless info-communication ecosystems.
Grigoriy Fokin, Andrey Koucheryavy
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Experimental studies on the relationship between HDOP and position error in the GPS system [PDF]
Metrology and Measurement Systems, 2022 2D position error in the Global Positioning System (GPS) depends on the Horizontal Dilution of Precision (HDOP) and User Equivalent Range Error UERE.
Mariusz Specht
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Engineering Proceedings, 2023 This paper addresses cooperative navigation using range radios to enable absolute positioning of low-flying UAS (LF) while operating in GNSS-denied environments.
Mats Martens, Maarten Uijt de Haag
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A Cost Function for the Uncertainty of Matching Point Distribution on Image Registration
ISPRS International Journal of Geo-Information, 2021 Computing the homography matrix using the known matching points is a key step in computer vision for image registration. In practice, the number, accuracy, and distribution of the known matching points can affect the uncertainty of the homography matrix.
Yuxia Bian +6 more
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