Results 61 to 70 of about 425 (159)
Engineering Reports, Volume 7, Issue 1, January 2025.ABSTRACT Due to the long transmission distance of the constellation network represented by the low‐orbit satellite system, the satellite‐to‐ground link is subject to large path loss and limited communication performance. This paper uses multi‐satellite and multi‐beam joint transmission technology to form a virtual multiplex network with ground multi ...
Yuyang Liu, Tong Shi, Hua Wang
wiley +1 more source
Remote Sensing, 2019 Abnormal information of satellite orbits inevitably appears in the broadcast ephemeris. Failure to obtain unhealthy information on GPS satellite orbits in precise orbit determination (POD) degrades GPS service performance.
Fei Ye +4 more
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Physical layer security in satellite communication: State‐of‐the‐art and open problems
IET Communications, Volume 19, Issue 1, January/December 2025.This paper first classifies contemporary satellite communication networks into five domains and then analyse the use of PLS in each domain; these domains are hybrid satellite‐terrestrial networks, satellite‐based IoT, navigation satellite systems, FSO‐based satellites, and inter‐satellite communications.
Nora Abdelsalam +2 more
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Design and Reception Method of Code Shift Keying Signals With Power‐of‐Two Phase Intervals
IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.A novel approach for the design and reception of CSK signals with a phase interval mapping of power‐of‐two chips is proposed. This method is capable of significantly reducing the demodulation complexity while mitigating the intersymbol interference. ABSTRACT Precise point positioning (PPP) technology has garnered extensive attention for its ability to ...
Nengjie Yu +4 more
wiley +1 more source
BeiDou Satellite Unhealthy States and the Impact on System Performance
Sensors, 2018 The BeiDou system satellites may be unhealthy due to many reasons, affecting system performance in different ways. Therefore, it is important to analyze the causes and characteristics of the satellites’ unhealthy states. In this study, these states
Caibo Hu +4 more
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IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.This article proposes a feedback node aided distributed spoofing (FNA‐DS) system, enabling flexible implementation of distributed spoofing. Field experiments using a self‐developed distributed spoofing prototype validate the FNA‐DS system's effectiveness and expose limitations in existing direction of arrival based anti‐spoofing techniques.
Minghan Zhong +3 more
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Reports on Geodesy and Geoinformatics, 2015 In computational tasks of satellite geodesy there is a need for transformation of coordinates between reference frames ECEF – Earth Centered, Earth Fixed and ECI – Earth Centered, Inertial.
Krzyżek Robert, Skorupa Bogdan
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A Satellite Drift Scan Approach for Establishing the Pointing Model of Radio Telescopes
Advances in Astronomy, Volume 2025, Issue 1, 2025.In the era of large satellite constellations, there are more than 1000 satellites in orbit. While the signals from these satellites may pose a risk of radio frequency interference (RFI) to radio telescopes, they also present a potential advantage by serving as high‐spatial‐density pointing references for radio telescopes.
Ye Yuan +4 more
wiley +1 more source
Robust factor graph optimisation method for shipborne GNSS/INS integrated navigation system
IET Radar, Sonar &Navigation, Volume 18, Issue 5, Page 782-798, May 2024.An adaptive factor based on pseudorange residual judgement is proposed to improve the accuracy of ship‐borne robust factor graph optimisation integrated navigation method. Using the historical information in the sliding window to estimate the occluded satellite signal.
Yuan Hu, Haozheng Li, Wei Liu
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A Real-Time Detection Method for BDS Signal in Space Anomalies
Sensors, 2019 Signal In Space (SIS) anomalies in satellite navigation systems can degrade satellite-based navigation and positioning performance. The occurrence of SIS anomalies from the BeiDou navigation satellite System (BDS) may be more frequent than for the Global
Chun Cheng +3 more
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