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Related Articles from SNS
Random Access for LEO Satellite Communication Systems via Deep Learning
arXiv:2512.07053v3 Announce Type: replace-cross Abstract: Integrating contention-based random access procedures into low Earth orbit (LEO) satellite communication (SatCom) systems poses new challenges, including long propagation delays, large Doppler shifts, and a large number of simultaneous access attempts. These factors degrade the efficiency and responsiveness of conventional random access schemes, particularly in scenarios such as satellite-based internet of things and direct-to-device...
Flexible FTN-Aided OTFS Modulation for High-Mobility LEO Satellite-to-Ground Communications
arXiv:2601.22526v2 Announce Type: replace Abstract: In low Earth orbit (LEO) satellite communications, the link quality fluctuates drastically during a satellite pass, exhibiting a wide dynamic range from the horizon to the zenith. Moreover, the high relative velocity induces severe Doppler shifts. While orthogonal time frequency space (OTFS) modulation effectively resolves the doubly-selective fading, its spectral efficiency is fundamentally bounded by the Nyquist limit.
Amazon Leo's satellite homework is late, but FCC won't flunk it just yet
Amazon is set to miss its deadline to deploy half of its Leo satellite constellation by July 30, as required by the Federal Communications Commission (FCC). The agency has, however, granted it a waiver of sorts – at the cost of priority status in spectrum licensing. The Bezos-founded behemoth got the go-ahead from the FCC for what was then known as Project Kuiper back in 2020.
Watch an Atlas V rocket launch 29 Amazon Leo internet satellites to orbit tonight
The article discusses the launch of 29 Amazon Leo internet satellites to orbit tonight using a ULA Atlas V-551 rocket. The rocket stands with the Amazon Leo logo on its fairing, and the launch is scheduled for December 14, 2025. The article provides a factual and concise summary of the event, without any commentary.
FCC lifts looming deadline for Amazon Leo satellite broadband constellation
The Federal Communications Commission has waived a requirement for Amazon to launch half of its satellite broadband constellation by the end of July, a key regulatory reprieve that buys the tech giant time to get more of its spacecraft into orbit. Amazon won regulatory approval for the Amazon Leo network in July 2020. The FCC's authorization came with two deadlines.
FCC lifts looming deadline for Amazon Leo satellite broadband constellation
The Federal Communications Commission has waived a requirement for Amazon to launch half of its satellite broadband constellation by the end of July, a key regulatory reprieve that buys the tech giant time to get more of its spacecraft into orbit. Amazon won regulatory approval for the Amazon Leo network in July 2020. The FCC's authorization came with two deadlines.
Collaborative Space Object Detection with Multi-Satellite Viewpoints in LEO Constellations
Announce Type: new Abstract: With the growing number of satellites in low Earth orbit (LEO) constellations, the near-Earth space environment has become increasingly congested, making space object detection (SOD) a pressing challenge for space safety and sustainability. To mitigate collision risks and ensure the continuity of space operations, SOD systems must deliver fast and accurate detection under stringent onboard constraints. In this paper, we investigate the potential of...
Mapping the Storm: Geospatial Impacts of Severe Weather on LEO Network Performance
Announce Type: cross Abstract: LEO satellite constellations, led by deployments such as Starlink, are playing an increasingly pivotal role in enabling global broadband connectivity. However, the reliability and performance of these space-based networks are highly sensitive to environmental dynamics, particularly localized weather phenomena that exhibit strong spatio-temporal variability. In this study, we present a continental-scale geospatial analysis of weather-induced performance...
Musk's Starlink leads Bezos' Amazon as airlines rush to boost in-flight Wi-Fi
Musk's Starlink leads Bezos' Amazon as airlines rush to boost in-flight Wi-Fi RIO DE JANEIRO, June 9 : Global airlines' push to attract premium customers is making fast in-flight Wi-Fi an increasingly important perk, turning a once-patchy paid service into an emerging battleground between Elon Musk's Starlink and Jeff Bezos' Amazon Leo satellite network. Starlink, which operates around two-thirds of all satellites in space and is the major driver of revenue for SpaceX, has signed up 11 new...
Rotatable Antenna-Enabled Satellite Communication: Joint Design of Boresight Alignment and Beam Tracking
new Abstract: Low Earth orbit (LEO) satellite links experience rapid angular variation due to high orbital velocities, which causes severe beam misalignment and array gain degradation under conventional fixed-antenna architectures. In this letter, we propose a rotatable antenna (RA)-enabled LEO communication framework, where RA arrays are deployed at both the satellite and the ground node (GN) to exploit antenna boresight reconfiguration as an additional spatial degree-of-freedom (DoF) for...