Results 1 to 10 of about 250,256 (245)
Geoscience Letters, 2021 In recent years, signal of opportunity reflectometry (SoOp-R) has become a promising remote sensing technique. This emerging technique employs the reflected signals from existing Global Navigation Satellite System (GNSS) or communication satellites to ...
Xuerui Wu +4 more
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PRN Sequence Estimation with a Self-Calibrating 40-Element Antenna Array
Navigation, 2023 This work explores the use of a low-cost global navigation satellite system (GNSS) antenna array including front-ends and a global navigation satellite system (GNSS) software receiver to receive signals of opportunity (SoO) whose pseudorandom noise (PRN)
Dominik Dötterböck +4 more
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Remote Sensing, 2023 Considering the problem of GNSS service interruption caused by the insufficient number of available satellites in complex environments, Low Earth Orbit (LEO) satellites can supplement GNSS effectively.
Muyuan Jiang +4 more
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Sensors, 2021 The traditional signal of opportunity (SOP) positioning system is equipped with dedicated receivers for each type of signal to ensure continuous signal perception. However, it causes a low equipment resources utilization and energy waste. With increasing
Zhongliang Deng +3 more
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Practical Use of Starlink Downlink Tones for Positioning
Sensors, 2023 The large availability of Low Earth Orbit (LEO) satellite systems makes them useful beyond their original purposes, such as in positioning, where their signals can be passively used.
Nabil Jardak, Ronan Adam
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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
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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
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Sensors, 2013 Since Global Navigation Satellite Systems (GNSS) show degraded performance in dense urban and indoor areas, a positioning sensor based on Digital Video Broadcast-Terrestrial (DVB-T) systems is presented in this paper.
Letizia Lo Presti +2 more
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Do subseasonal forecasts take advantage of Madden–Julian oscillation windows of opportunity?
Atmospheric Science Letters, 2022 This study proposes an objective methodology to highlight windows of opportunity in a numerical subseasonal forecasting system. The methodology is based on a contingency table and is applied to the prediction of heavy tropical precipitation by the ...
Damien Specq, Lauriane Batté
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Dianxin kexue, 2023 Communication and navigation symbiosis refers to the coexistence of these signals in the satellite ecological environment.For single-function low-orbit satellite constellations for positioning or communication, it is difficult to quickly perform ...
Jie SHEN +6 more
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