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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…

信号处理 · 电气工程与系统科学 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…

信息论 · 计算机科学 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…

信号处理 · 电气工程与系统科学 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…

信号处理 · 电气工程与系统科学 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…

信息论 · 计算机科学 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…

网络与互联网体系结构 · 计算机科学 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…

材料科学 · 物理学 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…

网络与互联网体系结构 · 计算机科学 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…

系统与控制 · 电气工程与系统科学 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.…

网络与互联网体系结构 · 计算机科学 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…

宇宙学与河外天体物理 · 物理学 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…

信号处理 · 电气工程与系统科学 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…

网络与互联网体系结构 · 计算机科学 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…

信息论 · 计算机科学 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.…

网络与互联网体系结构 · 计算机科学 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…

信号处理 · 电气工程与系统科学 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…

系统与控制 · 电气工程与系统科学 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…

天体物理仪器与方法 · 物理学 2021-10-25 Manuel Ntumba , Saurabh Gore , Pulkit Jain , Jean-Baptiste Awanyo