Results 81 to 90 of about 167,096 (220)
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
wiley +1 more source
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
Investigation on the Impact of Tropospheric Delay on GPS Height Variation near the Equator
, 2009 One of the major problems currently facing satellite-based positioning is the atmospheric refraction of the GPS signal caused by the troposphere. The tropospheric effect is much more pronounced at the equatorial region due to its hot and wet conditions ...
Dodo, Joseph D +2 more
core +1 more source
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
wiley +1 more source
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
Mass-Market Receiver for Static Positioning: Tests and Statistical Analyses [PDF]
, 2011 Nowadays, there are several low cost GPS receivers able to provide both pseudorange and carrier phase measurements in the L1band, that allow to have good realtime performances in outdoor condition.
Cina, Alberto, Marucco, G., Piras, Marco
core
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
wiley +1 more source
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
doaj +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
doaj +1 more source
Space Weather, Volume 22, Issue 4, April 2024.Abstract This study applies the zero‐differenced integer ambiguity method, named PPP‐Fixed, to extract real‐time ionospheric data and eliminate the latencies of rapid/final Global Ionosphere Maps (GIMs). The PPP‐Fixed method is also used to derive ionospheric data for post‐processed GIM generation, named SGG Post‐GIM, combined with low earth orbit ...
Jun Chen +5 more
wiley +1 more source