Results 11 to 20 of about 19,851 (292)
Multi-Constellation Software-Defined Receiver for Doppler Positioning with LEO Satellites [PDF]
Sensors, 2020 A Multi-Constellation Software-Defined Receiver (MC-SDR) is designed and implemented to extract the Doppler measurements of Low Earth Orbit (LEO) satellite’s downlink signals, such as Orbcomm, Iridium-Next, Globalstar, Starlink, OneWeb, SpaceX, etc.
Farzan Farhangian, René jr Landry
exaly +5 more sources
Doppler-Aided Positioning for Fused LEO Navigation Systems
Aerospace, 2023 Fused LEO navigation systems have been proposed as a low-cost means of supplementing and backing up global navigation satellite system (GNSS) navigation services based on low-earth orbit (LEO) constellations, which means broadcasting navigation signals ...
Lang Bian, Wang Weiwei, Bian Lang
exaly +4 more sources
Doppler Differential Positioning Technology Using the BDS/GPS Indoor Array Pseudolite System
Sensors, 2019 A Global Satellite Navigation System (GNSS) cannot provide normal location services in an indoor environment because the signals are blocked by buildings.
Xingli Gan, Lu Huang, Guangwei Fan
exaly +4 more sources
Analysis of Instantaneous Doppler Positioning Performance Based on LEO Satellite Ephemeris Errors
Remote SensingTo address the limitations of Global Navigation Satellite Systems (GNSSs), such as vulnerability to electromagnetic interference and weak ground signal power, signal of opportunity (SOP) provided by low Earth orbit (LEO) satellites can serve as a backup ...
Wanli Li, Wenlong Zhou, Xingyu Shi
exaly +4 more sources
Mobile ultrasonic transducer positioning
The Journal of Engineering, 2017 For positioning a moving ultrasonic transmitter, most of the existing ultrasonic positioning systems require the use of a bank of correlators to estimate the Doppler shift associated with its movement which require high computational complexity.
Mohammad Omar Khyam +3 more
doaj +4 more sources
A Decoupled Doppler Positioning Algorithm for Dynamic Receivers Using LEO Constellation Signals [PDF]
SensorsThe advancement of low-earth-orbit (LEO) communication constellations has revitalized interest in Doppler-based positioning. However, conventional Doppler positioning algorithms struggle with dynamic receivers under unknown initial states due to the ...
Tianqi Liu +6 more
doaj +2 more sources
Doppler-aided positioning in GNSS receivers - A performance analysis [PDF]
Signal Processing, 2020 The main objective of Global Navigation Satellite Systems (GNSS) is to precisely locate a receiver based on the reception of radio-frequency waveforms broadcasted by a set of satellites. Given delayed and Doppler shifted replicas of the known transmitted signals, the most widespread approach consists in a two-step algorithm.
François Vincent +4 more
openaire +5 more sources
Joint pseudo-range and Doppler positioning method with LEO Satellites‘ signals of opportunity
Satellite NavigationLow Earth Orbit (LEO) satellites, with their wide coverage and large number, have gradually become a crucial platform and means for navigation and positioning services. Compared to other LEO constellations, Starlink has over 6000 satellites in orbit, and
Ying Xu +5 more
doaj +2 more sources
Journal of Computer Networks and Communications, 2023 With the continuous development of mobile communication and satellite navigation technologies, the positioning requirements of 5G smart communication base stations are becoming higher and higher. With the opening of GNSS raw observation data, research on
Jianmin Wang, Yan Wang
doaj +2 more sources
Doppler Positioning with LEO Mega-Constellation: Equation Properties and Improved Algorithm
Remote SensingDoppler positioning, as an early form of positioning, has regained significant research interest in the context of Low Earth Orbit (LEO) satellites.Given the LEO mega-constellation scenario, the objective function of Doppler positioning manifests ...
Zichen Xu +6 more
doaj +2 more sources