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Low Earth Orbit (LEO) satellites are being extensively researched in the development of secure Internet of Remote Things (IoRT). In scenarios with miniaturized terminals, the limited transmission power and long transmission distance often…

Signal Processing · Electrical Eng. & Systems 2023-09-27 Pingyue Yue , Yixuan Li , Yue Li , Rui Zhang , Shuai Wang , Jianping An

With the goal of ubiquitous global connectivity, multibeam low Earth orbit (LEO) satellite communication (SATCOM) has attracted significant attention in recent years. The traffic demands of users are heterogeneous within the broad coverage…

Information Theory · Computer Science 2025-02-11 Jaehyup Seong , Juha Park , Juhwan Lee , Jungwoo Lee , Jung-Bin Kim , Wonjae Shin , H. Vincent Poor

The integration of Semantic Communications (SemCom) and edge computing in space networks enables the optimal allocation of the scarce energy, computing, and communication resources for data-intensive applications. We use Earth Observation…

This paper presents an analysis and experimental demonstration of single-satellite single-pass geolocation of a terrestrial broadcast Global Navigation Satellite System (GNSS) spoofer from Low Earth Orbit (LEO). The proliferation of…

Signal Processing · Electrical Eng. & Systems 2026-02-25 Zachary L. Clements , Patrick B. Ellis , Iain Goodridge , Matthew J. Murrian , Mark L. Psiaki , Todd E. Humphreys

Channel rank and condition number of multi-input multi-output (MIMO) channels can be effective indicators of achievable rates with spatial multiplexing in mobile networks. In this paper, we use extensive ray tracing simulations to…

Signal Processing · Electrical Eng. & Systems 2025-07-29 Donggu Lee , Ismail Guvenc

The extensive coverage offered by satellites makes them effective in enhancing service continuity for users on dynamic airborne and maritime platforms, such as airplanes and ships. In particular, geosynchronous Earth orbit (GEO) satellites…

Information Theory · Computer Science 2023-12-27 Dong-Hyun Jung , Hongjae Nam , Junil Choi , David J. Love

We report that Ly$\alpha$-emitting galaxies (LAEs) may not faithfully trace the cosmic web of neutral hydrogen (HI), but their distribution is likely biased depending on the viewing direction. We calculate the cross-correlation (CCF)…

Snapshot is a fundamental notion proposed for routing in mobile low earth orbit (LEO) satellite networks which is characterized with predictable topology dynamics. Its distribution has a great impact on the routing performance and on-board…

Networking and Internet Architecture · Computer Science 2014-12-23 Zhu Tang , Zhenqian Feng , Wanrong Yu , Baokang Zhao , Chunqing Wu

We describe an experimental technique for associating the satellite lines in a rare earth optical spectrum caused by a defect with the rare earth ions in crystal sites around that defect. This method involves measuring the hyperfine…

Materials Science · Physics 2013-11-27 Rose L. Ahlefeldt , Neil B. Manson , Wayne D. Hutchison , Matthew J. Sellars

Low Earth orbit (LEO) satellite networks (SatNets) are envisioned to play a crucial role in providing global and ubiquitous connectivity efficiently. Accordingly, in the coming years, thousands of LEO satellites will be launched to create…

Networking and Internet Architecture · Computer Science 2021-06-21 Mohammed Y. Abdelsadek , Halim Yanikomeroglu , Gunes Karabulut Kurt

Recently advanced low-Earth-orbit (LEO) satellite networks represented by large constellations and advanced payloads provide great promises for enabling high-quality Internet connectivity to any place on Earth. However, the traditional…

Systems and Control · Electrical Eng. & Systems 2022-12-08 Peng Hu

Low Earth Orbit (LEO) satellite networks are emerging as an essential communication infrastructure, with standardized 5G-based non-terrestrial networks and their integration with terrestrial systems envisioned as a key feature of 6G.…

Networking and Internet Architecture · Computer Science 2026-01-14 Andreas Casparsen , Jonas Ellegaard Jakobsen , Jimmy Jessen Nielsen , Petar Popovski , Israel Leyva Mayorga

We present distributions of orbital parameters of infalling satellites of $\Lambda$CDM haloes in the mass range $10^{12}-10^{14}$M$_\odot$, which represent the initial conditions for the subsequent evolution of substructures within the host…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-22 Lilian Jiang , Shaun Cole , Till Sawala , Carlos S. Frenk

Low Earth orbit (LEO) satellite constellations are emerging as a key enabler of next-generation communications, offering global coverage and significantly lower latency compared to traditional terrestrial networks and geostationary…

Signal Processing · Electrical Eng. & Systems 2025-07-01 Mohammad Taghi Dabiri , Mazen Hasna , Saud Althunibat , Khalid Qaraqe

With the increase in global positioning service demands and the requirement for more precise positioning, assisting existing medium and high orbit satellite-enabled positioning systems with low Earth orbit (LEO) satellites has garnered…

Networking and Internet Architecture · Computer Science 2025-06-05 Ruibo Wang , Mustafa A. Kishk , Howard H. Yang , Mohamed-Slim Alouini

Low Earth orbit (LEO) satellites have been envisioned as a significant component of the sixth generation (6G) network architecture for achieving ubiquitous coverage and seamless access. However, the implementation of LEO satellites is…

Information Theory · Computer Science 2024-06-10 Chenyu Wu , Shuai Han , Qian Chen , Yu Wang , Weixiao Meng , Abderrahim Benslimane

The construction of Low Earth Orbit (LEO) satellite constellations has recently spurred tremendous attention from academia and industry. 5G and 6G standards have specified LEO satellite network as a key component of 5G and 6G networks.…

Networking and Internet Architecture · Computer Science 2025-01-08 Jiasheng Wu , Shaojie Su , Xiong Wang , Jingjing Zhang , Yue Gao

The rapid deployment of large-scale low Earth orbit (LEO) satellite constellations has positioned direct-to-handset (D2H) communications as a key enabler of future non-terrestrial networks. However, the limited link budget of handheld…

Signal Processing · Electrical Eng. & Systems 2026-03-05 Hyunwoo Lee , Incheol Hwang , Daesik Hong

Non-terrestrial networks (NTN), particularly low Earth orbit (LEO) satellite networks, have emerged as a promising solution to overcome the limitations of traditional terrestrial networks in the context of next-generation (6G) wireless…

Systems and Control · Electrical Eng. & Systems 2023-10-09 Yanwu Lu , Howard Yang , Nikolaos Pappas , Giovanni Geraci , Chuan Ma , Tony Q. S. Quek

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