Results 11 to 20 of about 1,365 (214)
DronesLow-Earth-Orbit (LEO) satellite Signal-of-Opportunity (SOP) positioning technology has gradually matured to meet the accuracy requirements for unmanned aerial vehicle (UAV) positioning in daily scenarios.
Lihao Yao +8 more
doaj +3 more sources
Device-Free Counting via OFDM Signals of Opportunity [PDF]
2018 IEEE International Conference on Communications Workshops (ICC Workshops), 2018 Counting targets (people or things) within a monitored area is an important task in emerging wireless applications for smart environments, safety, and security. Counting via passive radars rely on signals of opportunity (i.e., signal already on air for other purposes) to detect and count device-free targets, which is preferable, in terms of privacy and
Stefania Bartoletti +2 more
openaire +2 more sources
Positioning via GEO communication satellites’ signals of opportunity [PDF]
IET Radar, Sonar & Navigation, 2021 Abstract Inherent vulnerabilities seriously weaken global navigation satellite system service capability, particularly in hostile environments where electronic jamming, blocking, and deception can occur. A new positioning technique is proposed that is based on navigation via signals of opportunity using communication satellites as a ...
Yuanyuan Gao +5 more
openaire +2 more sources
Electromagnetic modeling of scattered signals of opportunity: Challenges and approaches [PDF]
URSI Radio Science Bulletin, 2020 he possibility of exploiting signals of opportunity such as navigation signals for remote-sensing applications has been the object of extensive scientific research. Over the years, the potential of this technique has been mainly investigated for wind scatterometry and sea-surface altimetry, resulting in mission concepts and prototypes currently in ...
Comite, Davide +3 more
openaire +2 more sources
Signals Of Opportunity In Mobile Radio Positioning
, 2012 Publication in the conference proceedings of EUSIPCO, Bucharest, Romania ...
Dammann, Armin +2 more
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Performance considerations for positioning with signals of opportunity
2016 International Conference on Localization and GNSS (ICL-GNSS), 2016 This paper presents a study on the benefit of observing several signals of opportunity for positioning purposes. Several static emitters are placed over a defined area where an user is moving and acquiring measurements to each of these emitters. The simulation considers that the user is capable of acquiring time of arrival measurements from several ...
Lohan Elena-Simona +1 more
openaire +2 more sources
Positioning Using IRIDIUM Satellite Signals of Opportunity in Weak Signal Environment [PDF]
Electronics, 2019 In order to get rid of the dependence of the navigation and positioning system on the global navigation satellite system (GNSS), radio, television, satellite, and other signals of opportunity (SOPs) can be used to achieve receiver positioning. The space-based SOPs based on satellites offer better coverage and availability than ground-based SOPs.
Zizhong Tan +3 more
openaire +1 more source
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 ...
Xingyu Shi +8 more
doaj +1 more source
Contributions to Geophysics and Geodesy, 2021 Hydrometeors (rain, fog and ice crystals) affect the transmission of electromagnetic signals. Previous research showed that alterations in the signal (amplitude and phase) are affected by the composition of the atmosphere, e.g.
Peter FABO +4 more
doaj +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background and Aims Wilms tumour (WT) has excellent event‐free and overall survival (OS). However, small differences exist between countries participating in the same international study. This led us to examine variation in adherence to protocol recommendations as a potential contributing factor.
Suzanne Tugnait +23 more
wiley +1 more source