-
Low-Earth orbit (LEO) satellites have limited on-board resources, user terminals are unevenly distributed in the constantly changing coverage area, and the service requirements vary significantly. It is urgent to optimize resource allocation under the constrai…
pubmed
Wei D, Guo C, Yang L
2023 Oct 14
置信度 0.82
-
This paper proposes a robust symbol timing synchronization scheme for return link initial access based on the Digital Video Broadcasting-Return Channel via Satellite 2nd generation (DVB-RCS2) system for the Low Earth Orbit (LEO) satellite channel. In most case…
pubmed
Kim P, Park H
2023 Oct 8
置信度 0.82
-
Quantum key distribution (QKD) is a promising technique to resist the threat against quantum computers. However, the high loss of quantum signals over a long-distance optical fiber is an obstacle for QKD in the intercontinental domain. In this context, the qua…
pubmed
Guo M, Cao Y, Zhu J, Zhou X 等
2023 Jul 12
置信度 0.82
-
Asthma and atopic dermatitis (AD) are chronic allergic conditions, along with allergic rhinitis and food allergy and cause high morbidity and mortality both in children and adults. This study aims to evaluate the global, regional, national, and temporal trends…
pubmed
Shin YH, Hwang J, Kwon R, Lee SW 等
2023 Aug
置信度 0.82
-
To perform Earth observations, low-Earth orbit (LEO) satellites require attitude maneuvers, which can be classified into two types: maintenance of a target-pointing attitude and maneuvering between target-pointing attitudes. The former depends on the observati…
pubmed
Yun ST
2023 May 11
置信度 0.82
-
Direction-of-arrival (DoA) estimation methods are highly versatile and find extensive applications in satellite communication. DoA methods are employed across a range of orbits, from low Earth orbits (LEO) to geostationary Earth orbits (GEO). They serve multip…
pubmed
Hasib M, Kandeepan S, Rowe WST, Al-Hourani A
2023 Jun 9
置信度 0.82
-
Thanks to their wide coverage and relatively low latency compared to geosynchronous satellites, Low Earth Orbit (LEO) satellite networks have been regarded as one of the most promising solutions to provide global broadband backhaul for mobile users and IoT dev…
pubmed
Zhou Y, Liu J, Zhang R, Ouyang M 等
2023 Jun 8
置信度 0.82
-
Fast convergence routing is a critical issue for Low Earth Orbit (LEO) constellation networks because these networks have dynamic topology changes, and transmission requirements can vary over time. However, most of the previous research has focused on the Open…
pubmed
Ding Z, Liu H, Tian F, Yang Z 等
2023 May 29
置信度 0.82
-
Recent advancements in space technology and reduced launching cost led companies, defence and government organisations to turn their attention to low Earth orbit (LEO) and very low Earth orbit (VLEO) satellites, for they offer significant advantages over other…
pubmed
Weerasinghe J, Prasad K, Mathew J, Trifoni E 等
2023 May 30
置信度 0.82
-
Due to the characteristics of global coverage, on-demand access, and large capacity, the low earth orbit (LEO) satellite communication (SatCom) has become one promising technology to support the Internet-of-Things (IoT). However, due to the scarcity of satelli…
pubmed
Cai B, Zhang Q, Ge J, Xie W
2023 Apr 11
置信度 0.82
-
In this paper, an asynchronous collision-tolerant ACRDA scheme based on satellite-selection collaboration-beamforming (SC-ACRDA) is proposed to solve the avalanche effect caused by packet collision under random access (RA) high load in the low earth orbit (LEO…
pubmed
Hong T, Liu R, Liu Z, Ding X 等
2023 Mar 28
置信度 0.82
-
In the realm of providing space-based internet access services, utilizing large-scale low Earth orbit (LEO) satellite networks have emerged as a promising solution for bridging the digital divide and connecting previously unconnected regions. The deployment of…
pubmed
Yang Z, Tian F, Jin J, Liu H
2023 Mar 17
置信度 0.82
-
Free-space optical (FSO) systems are compulsory to realize high capacity and interference-free communication links from low-Earth orbit (LEO) satellite constellations as well as spacecraft and space stations to the Earth. To be integrated with high-capacity gr…
pubmed
Trinh PV, Kolev DR, Shiratama K, Carrasco-Casado A 等
2023 Feb 27
置信度 0.82
-
In recent years, low-orbit satellites have become an important development direction in satellite IoT systems. The number of terminals is large and data collisions occur frequently in the low-orbit satellite IoT scenario. How to design a reliable random access…
pubmed
Nie Y, Zhang G
2023 Jan 27
置信度 0.82
-
The railway sector has been characterized by important innovations regarding digital technologies for train-to-ground communications. The actual GSM-R system is considered an obsolescent technology expected to be dismissed by 2030. The future communication sys…
pubmed
Vizzarri A, Mazzenga F, Giuliano R
2022 Dec 21
置信度 0.82
-
Endangered Asiatic lions ( Panthera leo persica ) are found in the Asiatic Lion Landscape, Gujarat, which includes protected areas and a multi-use land matrix. Therefore, monitoring lions' space-use and spatio-temporal location is vital for managing various fa…
pubmed
Ram M, Sahu A, Srivastava N, Jhala L 等
2022 Dec 28
置信度 0.82
-
Human immunodeficiency virus and acquired immune deficiency syndrome (HIV/AIDS) is still among the leading causes of disease burden and mortality in sub-Saharan Africa (SSA), and the world is not on track to meet targets set for ending the epidemic by the Join…
pubmed
Haeuser E, Serfes AL, Cork MA, Yang M 等
2022 Dec 19
置信度 0.82
-
Nowadays, mega-constellations of Low Earth Orbit (LEO) satellites have become increasingly important to provide high-performance Internet access with global coverage. This paper provides an updated comparison of four of the largest LEO mega-constellations: Tel…
pubmed
Merino-Fernandez I, Khemchandani SL, Del Pino J, Saiz-Perez J
2022 Dec 2
置信度 0.82
-
Low Earth Orbit (LEO) satellite communication networks have become an important means to provide internet access services for areas with limited infrastructure. Compared with the Geostationary Earth Orbit (GEO) satellites, the LEO satellites have limited on-bo…
pubmed
Guo S, Han K, Gong W, Li L 等
2022 Nov 29
置信度 0.82
-
With the vigorous development of information and communication technology, mobile internet has undergone tremendous changes. How to achieve global coverage of the network has become the primary problem to be solved. GEO satellites and LEO satellites, as import…
pubmed
Ding H, Zhu S, Meng S, Han J 等
2022 Nov 2
置信度 0.82
-
Satellite IoT networks (S-IoT-N), which have been a hot issue regarding the next generation of communication, are quite important for the coming era of digital twins and the metaverse because of their performance in sensing and monitoring anywhere, anytime, an…
pubmed
Lin W, Dong Z, Wang K, Wang D 等
2022 Oct 18
置信度 0.82
-
Optical satellite networks using laser intersatellite links are recognized as being capable of satisfying the increasing broadband communication demands. However, the Doppler shift due to relative movement between satellites must be taken into consideration. A…
pubmed
Tan L, Wang X, Cheng S, Ma J 等
2022 Jun 1
置信度 0.82
-
With the development of large low earth orbit (LEO) communication constellations, the efficiency of laser inter-satellite link (ISL) establishing become the bottleneck for subsequent large-scale launch and rapid networking applications of LEO communication con…
pubmed
Hu S, Yu H, Duan Z, Zhu Y 等
2022 Sep 12
置信度 0.82
-
The 3rd Generation Partnership Project (3GPP) narrowband Internet of Things (NB-IoT) over non-terrestrial networks (NTN) is the most promising candidate technology supporting 5G massive machine-type communication. Compared to geostationary earth orbit, low ear…
pubmed
Kim MG, Jo HS
2022 Sep 19
置信度 0.82
-
In the satellite multigroup multicast communication systems based on the DVB-S2X standard, due to the limitation of the DVB-S2X frame structure, user scheduling and beamforming design have become the focus of academic research. In this work, we take the massiv…
pubmed
Liu Y, Li C, Li J, Feng L
2022 Sep 10
置信度 0.82
-
In low earth orbit (LEO) satellite-based applications (e.g., remote sensing and surveillance), it is important to efficiently transmit collected data to ground stations (GS). However, LEO satellites' high mobility and resultant insufficient time for downloadin…
pubmed
Choi H, Pack S
2022 Sep 10
置信度 0.82
-
The multi-satellites cooperative transmission can effectively increase the data rate that can be achieved by internet of things (IoT) terminals. However, the dynamic characteristics brought by low Earth orbit (LEO) satellites will seriously decrease the data r…
pubmed
Xu B, Li X, Ma Y, Xin X 等
2022 Aug 12
置信度 0.82
-
With the fast development of giant LEO constellations, the effective spectrum utilization has been regarded as one of the key orientations for satellite communications. This paper focuses on improving the spectrum utilization efficiency of satellite communicat…
pubmed
Wang Y, Niu H, Zhao Q, Wang L 等
2022 May 17
置信度 0.82
-
The blooming of internet of things (IoT) services calls for a paradigm shift in the design of communications systems. Short data packets sporadically transmitted by a multitude of low-cost low-power terminals require a radical change in relevant aspects of the…
pubmed
Clazzer F, Grec M
2022 May 14
置信度 0.82
-
In order to solve the collaborative navigation problems in challenging environments such as insufficient visible satellites, obstacle reflections and multipath errors, and in order to improve the accuracy, usability, and stability of collaborative navigation a…
pubmed
Ye L, Yang Y, Ma J, Deng L 等
2022 Apr 22
置信度 0.82
-
This paper examines reliable and energy-efficient transmission in low earth orbit (LEO) satellite communication systems. In particular, we analyze the link transmission characteristics of the LEO satellite to the ground user and model the channel as a combinat…
pubmed
Bian H, Liu R
2022 Apr 15
置信度 0.82
-
There is a common practice to calculate orbital trajectories of space objects like satellites and space debris using Two-Line Element Sets (TLEs). However, TLEs provide rather coarse parameters for fine orbit computation and their precision varies with age of …
pubmed
Kovář P, Puričer P, Kovářová K
2022 Apr 10
置信度 0.82
-
Resilient navigation in Global Navigation Satellite System (GNSS)-degraded and -denied environments is becoming more and more required for many applications. It can typically be based on multi-sensor data fusion that relies on alternative technologies to GNSS.…
pubmed
Jardak N, Jault Q
2022 Mar 25
置信度 0.82
-
crossref
2024-03-20T08:23:30Z
置信度 0.70
-
crossref
2025-06-24T04:00:27Z
置信度 0.70
-
crossref
2005-12-06T05:30:38Z
置信度 0.70
-
crossref
2005-12-06T00:30:38Z
置信度 0.70
-
crossref
Yue Cui, Tian Liu
2026-05-06T19:39:29Z
置信度 0.70
-
crossref
Shiqi Guo, Long Zhao, Yanning Cui
2023-04-10T15:01:44Z
置信度 0.70
-
crossref
Zhenyu Na, Qinyang Guan, Ce Fu, Yang Cui 等
2014-02-11T02:19:31Z
置信度 0.70
-
crossref
James LaPrade
2012-12-18T09:48:28Z
置信度 0.70
-
This study investigates a wavelet-aided orthogonal time-frequency space (W-OTFS) modulation system operating in low earth orbit (LEO) satellite systems. The discrete wavelet transform (DWT) underlying the complex input signals (high-order modulation) is not ap…
crossref
Saifur Rahman Sabuj, Han-Shin Jo
2025-04-11T14:29:42Z
置信度 0.70
-
crossref
Leo Hartman
2012-12-18T14:48:28Z
置信度 0.70
-
crossref
Stefano Lagrasta
2007-12-18T17:56:43Z
置信度 0.70
-
crossref
2005-12-06T05:30:38Z
置信度 0.70
-
crossref
Kaiwei Wang, Shuo Wang
2023-01-02T19:09:01Z
置信度 0.70
-
crossref
Lihua Li, Jiping Huang, Kexin Chang, Wenhui Zhou
2024-04-08T20:33:44Z
置信度 0.70
-
crossref
Stephan Olariu
2006-07-01T19:33:45Z
置信度 0.70
-
crossref
Mogbonjubola Rahman, Tom Walingo, Fambirai Takawira
2015-11-23T17:42:45Z
置信度 0.70
-
This paper investigates an innovative approach to enable Joint Communication and Positioning (JCAP) in 5G Non-Terrestrial Networks (NTN) using Low Earth Orbit (LEO) multi-beam satellite systems. The integration of communication and navigation services is achie…
crossref
Alejandro Gonzalez Garrido, Jorge Querol, Symeon Chatzinotas, Henk Wymeersh
2025-02-11T23:48:11Z
置信度 0.70
-
crossref
Kazuhiro Kimura, Keizo Inagaki, Yoshio Karasawa
2004-10-21T18:03:07Z
置信度 0.70
-
<p>The increasing demand in data rates and new emerging applications require that the future generation of satellite networks will be designed at sub-THz frequencies with ultra-broad bandwidth. At such frequencies, the satellite channel is impaired by th…
crossref
Rajnish Kumar, Shlomi Arnon
2022-09-15T02:04:08Z
置信度 0.70
-
crossref
Yuan Fu
2021-11-25T20:30:53Z
置信度 0.70
-
crossref
2005-12-06T05:30:38Z
置信度 0.70
-
crossref
K.F. Kwok
2005-11-09T16:41:52Z
置信度 0.70
-
crossref
Dongnuan Cui, Weiqian Duar, Ruiliang Song
2022-01-04T20:36:39Z
置信度 0.70
-
crossref
Mohammed Abdrabou, T. Aaron Gulliver
2023-01-02T19:09:01Z
置信度 0.70
-
crossref
Joohan Park, Sungmin Oh
2026-02-19T20:55:29Z
置信度 0.70
-
crossref
Sengly Muy, JungRyun Lee
2024-12-18T21:38:22Z
置信度 0.70
-
crossref
Martin Deckett
2013-08-28T16:36:40Z
置信度 0.70
-
crossref
2021-02-09T03:09:17Z
置信度 0.70
-
crossref
2005-12-06T00:30:38Z
置信度 0.70
-
crossref
Zaher Zak Kassas
2024-08-06T14:05:49Z
置信度 0.70
-
crossref
Mario Franke, Christoph Sommer
2024-07-02T14:10:48Z
置信度 0.70
-
crossref
Pranathi Kunadi, Navrati Saxena, Yash Bhamre, Abhishek Roy
2025-02-06T18:31:53Z
置信度 0.70
-
crossref
Bagas Satriyotomo, Seongmin Pyo
2024-01-23T20:43:20Z
置信度 0.70
-
crossref
Tanyue Mao
2009-09-16T18:23:33Z
置信度 0.70
-
This study introduces a complex wavelet-based affine frequency division multiplexing (CW-AFDM) system designed to enable simultaneous communication and radar sensing in high-mobility satellite communication environments. We develop a transceiver architecture e…
crossref
Saifur Sabuj, Sung-Hun Lee, Han-Shin Jo
2025-07-24T22:22:24Z
置信度 0.70
-
crossref
2005-12-06T05:30:38Z
置信度 0.70
-
crossref
Kawsu Sidibeh, Tanya Vladimirova
2008-08-06T20:14:32Z
置信度 0.70
-
crossref
2005-12-06T05:30:38Z
置信度 0.70
-
crossref
2005-12-06T05:30:38Z
置信度 0.70
-
crossref
Zuolin Jin, Dechao Chen, Jinxuan Huang
2023-03-27T14:29:19Z
置信度 0.70
-
crossref
Changhong Wang, Fei Gao
2019-11-05T11:45:27Z
置信度 0.70
-
crossref
Di Zhang
2026-07-28T19:03:32Z
置信度 0.70
-
crossref
Jianwei Li, Dongdong Wang, Lizhe Liu, Bin Wang 等
2023-03-27T18:29:19Z
置信度 0.70
-
crossref
Aqiel Al-Mamori
2026-07-16T15:10:39Z
置信度 0.70
-
crossref
Karim A. Fouad, XiaoJian Xu
2008-11-25T10:48:47Z
置信度 0.70
-
crossref
Akihiro Nakao
2025-08-12T17:51:39Z
置信度 0.70
-
crossref
He Sun, Wenhua Chen, Zhen Gao, Silong Zhang 等
2013-10-11T22:42:13Z
置信度 0.70
-
crossref
Donatella Darsena, Giacinto Gelli, Ivan Iudice, Francesco Verde
2024-02-07T18:36:02Z
置信度 0.70
-
The 6G communication system will be designed at sub-THz frequencies due to increasing demand in data rates, emerging new applications and advanced communication technologies. These high-performing systems will heavily rely on artificial intelligence (AI) for e…
crossref
Rajnish Kumar, Shlomi Arnon
2022-11-28T08:43:03Z
置信度 0.70
-
crossref
Olivier de Weck, Darren (Datong) Zhang, Cyrus Jilla
2012-12-18T14:48:28Z
置信度 0.70
-
crossref
2019-12-20T08:12:10Z
置信度 0.70
-
crossref
Darby Cooper, Jeffrey Lasater, Robert Sternowski, William Byrd
2013-08-28T16:48:05Z
置信度 0.70
-
crossref
Xian Liu
2023-03-23T17:39:46Z
置信度 0.70
-
crossref
Jihoon Lee, Gun-Goo Lee, Joon-Gyu Ryu
2026-02-19T20:55:29Z
置信度 0.70
-
crossref
K.I. Thimothy, Tan Soon Hie, N. Nagarajan
2003-10-01T14:55:21Z
置信度 0.70
-
A collaborative energy-efficient routing algorithm reduces excessive power consumption of satellites in shadow regions in LEO optical networks, decreasing life consumption of heavily loaded satellites by 29.7% compared to conventional methods.
crossref
Zijian Cui, Yongli Zhao, Wei Wang, Xin Li 等
2025-06-03T14:57:35Z
置信度 0.70
-
crossref
Young Hoon Kwon, Ji Young Yun, Dan Keun Sung
2002-08-25T19:47:39Z
置信度 0.70
-
crossref
Faria, Arsalan Ahmad, Salman Ghafoor
2024-10-08T17:33:15Z
置信度 0.70
-
crossref
Hartmut Brandt, Falco Krepel, Carsten Tittel
2012-12-18T14:48:28Z
置信度 0.70
-
crossref
Wenyi Zhang, Zihan Xu, Sangeetha Abdu Jyothi
2024-10-22T12:20:28Z
置信度 0.70
-
crossref
Jing Ma, Lei Zhong, Ryokichi Onishi
2024-02-26T14:45:36Z
置信度 0.70
-
This presentation introduces NTT’s recent activities toward future satellite optical communications. Some services using remote sensing data and IoT control, and the research for flexible topology control for complex LEO satellite optical networks are presente…
crossref
Katsuaki Higashimori
2025-07-07T15:54:46Z
置信度 0.70
-
crossref
I Wayan Mustika, Sevia M. Idrus, Fauza Khair, Anggun Fitrian Isnawati 等
2024-02-07T18:36:02Z
置信度 0.70
-
crossref
Peiman Aliparast, Sevda Aliparast
2016-07-20T12:36:02Z
置信度 0.70
-
crossref
Yonghwa Lee, Jeongho Kwak, Jihwan P. Choi
2021-12-07T20:49:57Z
置信度 0.70
-
crossref
Ruofei Ma
2025-09-18T17:47:26Z
置信度 0.70
-
India’s satellite programs, though advanced in payload development and launch operations, still rely predominantly on ground-station-dependent communication. This dependence leads to temporal gaps in data relay, increased mission latency, and limited real-time…
crossref
Shashank Mall
2025-10-13T10:43:56Z
置信度 0.70