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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Horizontal dilution of precision-based ultra-wideband positioning technique for indoor environments
TURKISH JOURNAL OF ELECTRICAL ENGINEERING & COMPUTER SCIENCES, 2014 Ultra-wideband (UWB) technology provides considerable performance in many indoor localization problems thanks to its very wide spectrum and high-resolution characteristics. In this paper, we propose using the horizontal dilution of precision (HDOP) to decrease the localization error in indoor environments for UWB localization systems.
Kerem Küçük
exaly +5 more sources
HDOP and VDOP Analysis in an Ideal Placement Environment for Dual GNSSs
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
doaj +2 more sources
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
doaj +2 more sources
A High-Precision Cooperative Localization Method for UAVs Based on Multi-Condition Constraints [PDF]
SensorsGlobal Navigation Satellite Systems (GNSSs) often suffer from significant localization errors in signal-denied environments. Furthermore, the accuracy of multi-UAV cooperative localization is highly sensitive to the relative geometric configuration of ...
Haiqiao Liu +4 more
doaj +2 more sources
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
doaj +2 more sources
Optimization of UWB Base Station Deployment for Formwork Scaffolds in Underground Construction with Sub-Meter Positioning Accuracy by Semi-Controlled Field Experiments [PDF]
SensorsFall-from-height fatalities in underground construction are closely associated with formwork scaffold operations, where dense steel members cause severe non-line-of-sight (NLOS) and multipath effects that degrade positioning performance.
Gang Yao +7 more
doaj +2 more sources
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source