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Low Earth orbit (LEO) satellites are leveraged to support new position, navigation, and timing (PNT) service alternatives to GNSS. These alternatives require accurate propagation of satellite position and velocity with a realistic…

Machine Learning · Computer Science 2026-02-20 Alex Moody , Penina Axelrad , Rebecca Russell

The high number of objects in the LEO is a risk that collisions between sub-orbital or escape velocity objects with an orbiting object of satellites occur when two satellites collide while orbiting the earth. One of the approaches to avoid…

Instrumentation and Methods for Astrophysics · Physics 2021-10-25 Manuel Ntumba , Saurabh Gore , Pulkit Jain , Jean-Baptiste Awanyo

The age of information (AoI) performance analysis is essential for evaluating the information freshness in the large-scale mobile edge computing (MEC) networks. This work proposes the earliest analysis of the mean AoI (MAoI) performance of…

Systems and Control · Electrical Eng. & Systems 2024-09-25 Ying Dong , Hang Xiao , Haonan Hu , Jiliang Zhang , Qianbin Chen , Jie Zhang

This paper presents a study of an integrated satellite-terrestrial network, where Low-Earth-Orbit (LEO) satellites are used to provide the backhaul link between base stations (BSs) and the core network. The mobility of LEO satellites raises…

Signal Processing · Electrical Eng. & Systems 2023-03-21 Hung Nguyen-Kha , Vu Nguyen Ha , Eva Lagunas , Symeon Chatzinotas , Joel Grotz

Mobile Edge Computing (MEC) is expected to play a significant role in the development of 6G networks, as new applications such as cooperative driving and eXtended Reality (XR) require both communication and computational resources from the…

Networking and Internet Architecture · Computer Science 2023-07-06 Federico Chiariotti

The growing availability of Earth Observation (EO) data and recent advances in Computer Vision have driven rapid progress in machine learning for EO, producing domain-specific models at ever-increasing scales. Yet this progress risks…

Computer Vision and Pattern Recognition · Computer Science 2026-03-17 Tasos Papazafeiropoulos , Nikolaos Ioannis Bountos , Nikolas Papadopoulos , Ioannis Papoutsis

In satellite constellation-based communication systems, continuous user coverage requires frequent handoffs due to the dynamic topology induced by the Low Earth Orbit (LEO) satellites. Each handoff between a satellite and ground users…

Information Theory · Computer Science 2025-11-26 Yassine Afif , Mohammed Almekhlafi , Antoine Lesage-Landry , Gunes Karabulut Kurt

Satellites in Geostationary Orbit (GEO) provide a number of commercial, government, and military services around the world, offering everything from surveillance and monitoring to video calls and internet access. However a dramatic lowering…

Cryptography and Security · Computer Science 2022-04-29 Frederick Rawlins , Richard Baker , Ivan Martinovic

Age-of-information (AoI) is a novel metric that measures the freshness of information in status update scenarios. It is essential for real-time applications to transmit status update packets to the destination node as timely as possible.…

Distributed, Parallel, and Cluster Computing · Computer Science 2019-01-15 Qiaobin Kuang , Jie Gong , Xiang Chen , Xiao Ma

The rapid development of communication technologies in the past decades has provided immense vertical opportunities for individuals and enterprises. However, conventional terrestrial cellular networks have unfortunately neglected the huge…

Signal Processing · Electrical Eng. & Systems 2021-06-22 Shicong Liu , Zhen Gao , Yongpeng Wu , Derrick Wing Kwan Ng , Xiqi Gao , Kai-Kit Wong , Symeon Chatzinotas , Bjorn Ottersten

Recent advances in computer vision has led to a growth of interest in deploying visual analytics model on mobile devices. However, most mobile devices have limited computing power, which prohibits them from running large scale visual…

Image and Video Processing · Electrical Eng. & Systems 2022-04-18 Zhongzheng Yuan , Samyak Rawlekar , Siddharth Garg , Elza Erkip , Yao Wang

Optical Earth observation satellites acquire images worldwide , covering up to several million square kilometers every day. The complexity of scheduling acquisitions for such systems increases exponentially when considering the…

Machine Learning · Computer Science 2019-11-14 Adrien Hadj-Salah , Rémi Verdier , Clément Caron , Mathieu Picard , Mikaël Capelle

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…

Signal Processing · Electrical Eng. & Systems 2026-01-27 Hyunwoo Lee , Ian P. Roberts , Jinkyo Jeong , Daesik Hong

This paper offers a thorough analysis of the coverage performance of Low Earth Orbit (LEO) satellite networks using a strongest satellite association approach, with a particular emphasis on shadowing effects modeled through a Poisson point…

Information Theory · Computer Science 2024-09-09 Jinseok Choi , Jeonghun Park , Junse Lee , Namyoon Lee

Low Earth Orbit (LEO) satellite communication is a promising solution for global wireless coverage, especially in underserved and remote areas. However, the high relative velocity of LEO satellites induces significant Doppler shifts that…

Systems and Control · Electrical Eng. & Systems 2025-07-01 Islam M. Tanash , Risto Wichman , Nuria Gonzalez-Prelcic

The developments of satellite communication in network systems require strong and effective security plans. Attacks such as denial of service (DoS) can be detected through the use of machine learning techniques, especially under normal…

Cryptography and Security · Computer Science 2023-01-11 Nacereddine Sitouah , Fatiha Merazka , Abdenour Hedjazi

The nearby space surrounding the Earth is densely populated by artificial satellites and instruments, whose orbits are distributed within the Low-Earth-Orbit region (LEO), ranging between 90 and 2 000 $km$ of altitude. As a consequence of…

Earth and Planetary Astrophysics · Physics 2017-10-10 Alessandra Celletti , Cătălin Galeş

Age of Information (AoI), measures the time elapsed since the last received information packet was generated at the source. We consider the problem of AoI minimization for single-hop flows in a wireless network, under pairwise interference…

Information Theory · Computer Science 2018-03-20 Rajat Talak , Sertac Karaman , Eytan Modiano

A mega-constellation of low-earth orbit (LEO) satellites has the potential to enable long-range communication with low latency. Integrating this with burgeoning unmanned aerial vehicle (UAV) assisted non-terrestrial networks will be a…

Networking and Internet Architecture · Computer Science 2020-05-27 Ju-Hyung Lee , Jihong Park , Mehdi Bennis , Young-Chai Ko

When we are primarily interested in solving several problems jointly with a given prescribed high performance accuracy for each target application, then Foundation Models should for most cases be used rather than problem-specific models. We…

Computer Vision and Pattern Recognition · Computer Science 2024-06-27 Nikolaos Dionelis , Casper Fibaek , Luke Camilleri , Andreas Luyts , Jente Bosmans , Bertrand Le Saux