Journal articles: 'Satellite communication systems'

1

Harris, R. L. "Satellite communication systems." Electronics & Communications Engineering Journal 3, no. 6 (1991): 242. http://dx.doi.org/10.1049/ecej:19910040.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Saiko, Volodymyr, Teodor Narytnyk, Valeriy Gladkykh, and Natalia Sivkova. "INNOVATIVE SOLUTION FOR LEO-SYSTEM WITH DISTRIBUTED SATELLITE ARCHITECTURE." Information systems and technologies security, no. 1 (2) (2020): 77–83. http://dx.doi.org/10.17721/ists.2020.1.77-83.

Full text

Abstract:

An innovative solution for practical implementation in a LEO system with a "distributed satellite" architecture that can be used to provide low-orbital spacecraft communications with ground stations and users of 5G / IoT satellite services is proposed. The essence of the proposed development in the system of low-orbital satellite communication with FC-architecture is that to reduce the delay in signaling to consumers and the probability of overloading the network into a prospective system of low-orbital satellite communication, which contains artificial Earth satellites, each of which functions in Earth orbit and equipped with onboard repeaters, inter-satellite communications, a network of ground-based communication and control systems for artificial satellites of the Earth, a grouping of low-orbiting space their devices (LEO-system), which includes the grouping of root (leading) satellites and satellites-repeaters (slave), around each root satellite is formed micro-grouping of satellites-repeaters, and functions of the root satellite in the selected orbital phase of the orbital -or micro-satellites that are connected to the annular network by communication lines between satellites, and - functions of satellites-repeaters - kubsat, new is the introduction of a multilevel boundary cloud system, which is a heterogeneity distributed computing cloud structure. At the same time, the boundary clouds of the multilevel system are connected by ultra-high-speed wireless terahertz radio lines and wireless optical communication systems. The technique of estimation of access time in the proposed structure of "fog computing" on the basis of the model of access in "fog computing" with the resolution of collisions of data sources implementing the survey mode is presented.

APA, Harvard, Vancouver, ISO, and other styles

3

Ilchenko, M. Yu, T. M. Narytnyk, V. I. Prysiazhnyi, S. V. Kapshtyk, and S. A. Matvienko. "Space infrastructure of the Internet of things. State and prospects of development." Kosmìčna nauka ì tehnologìâ 27, no. 6 (2021): 65–84. http://dx.doi.org/10.15407/knit2021.06.065.

Full text

Abstract:

We present an overview of possibilities for existing Satellite Communication Systems utilization to provide Internet of Things Services. It is shown that existing Satellite Communication Systems provide traffic transmission for IoT Systems with Cloud Architecture. The proposals are explicated on the possibility of using Fog and Edge Computing for Satellite Communication Systems. The implementation of Fog and Edge computing in IoT Systems requires the modernization of the Low-Earth Orbit (LEO) and Geostationary Orbit (GEO) Satellite Communication Systems, and we show the ways of their enhancement. To increase the efficiency of IoT data processing and the reliability of IoT Data Storage, we propose to construct an Orbital Cloud Data Storage in GEO, which consists of several GEO Satellites - Cloud Computing Data Centers. Such a structure would require the development of methods of access providing to the Orbital Cloud Data Storage. For these purposes, our propositions include using GEO High-Throughput Satellites and satellites from the structure of LEO Satellite Communication. The issues of interaction between Orbital Cloud Data Storage and ground-based Cloud Data Processing and Storage Infrastructure are briefly considered. The orbital slots in GEO are proposed for the location of GEO Satellites - Cloud Computing Data Centers.

APA, Harvard, Vancouver, ISO, and other styles

4

Zhang, Haojie, Di Ren, and Fanghua Jiang. "A Beam Search-Based Channel Allocation Method for Interference Mitigation of NGSO Satellites with Multi-Beam Antennas." Aerospace 9, no. 4 (March 23, 2022): 177. http://dx.doi.org/10.3390/aerospace9040177.

Full text

Abstract:

In the past few years, non-geostationary orbit (NGSO) satellite communication constellations have regained popularity due to their conspicuous advantages. Nevertheless, with more NGSO satellites getting involved in communications, the spectrum resources should become much more scarce. Multi-beam high throughput satellite and spectrum sharing are two major techniques in communication design. The two techniques can significantly mitigate interference and highly augment the capacity of the communication system. Thus, they are commonly used in satellite communication systems nowadays. With a massive number of NGSO satellites comprising the communication system and moving in their orbits, interference scenarios are pretty complex. In this article, the relationship between the level of interference and the beam distance is deduced. Moreover, for beams with different tilting angles, the different off-axis angles may correspond to the same beam distance, which is directly related to the interference level. Through the interference analysis, we propose a channel allocation method that uses a beam search algorithm to optimize the channel allocation problem and achieves outstanding time efficiency. The performance of the proposed method is validated by a coexisting scenario of the geostationary orbit and NGSO satellite communication systems. The results show that the level of interference can be largely mitigated, and the capacity of communication systems is significantly augmented.

APA, Harvard, Vancouver, ISO, and other styles

5

Vahid oğlu Nasiyev, Müslim. "Research and application of satellite communication networks as an alternative to modern communication systems." SCIENTIFIC WORK 68, no. 07 (July 22, 2021): 78–83. http://dx.doi.org/10.36719/2663-4619/68/78-83.

Full text

Abstract:

Research work has been devoted to show how satellite technology can meet a variety of human needs and the ultimate measure of its effectiveness. Communication satellites, whether in geostationary Earth orbit (GEO) or non GEO, provide an effective platform to relay radio signals between points on the ground. The users who employ these signals enjoy a broad spectrum of telecommunication services on the ground, at sea, and in the air. In recent years, such systems have become practical to the point where a typical household can have its own satellite dish. That dish can receive a broad range of television programming and provide broadband access to the Internet. Key words: satellite, antenna, Earth orbit (GEO), transponder, VHF, frequency modulation (FM)10.36719/2663-4619/68/78-83 Müslim Vahid oğlu Nasiyev Azərbaycan Texniki Universiteti magistrant mnesiyev@gmail.com MÜASİR RABİTƏ SİSTEMLƏRİNƏ ALTERNATİV OLARAQ, PEYK RABİTƏ ŞƏBƏKƏLƏRİNİN ARAŞDIRILMASI VƏ TƏTBİQİ Açar sözlər: Peyk, antena, yer orbiti (GEO), transponder, VHF, tezlik modulyasiyası (FM) Research and application of satellite communication networks as an alternative to modern communication systems Summary Research work has been devoted to show how satellite technology can meet a variety of human needs and the ultimate measure of its effectiveness. Communication satellites, whether in geostationary Earth orbit (GEO) or non GEO, provide an effective platform to relay radio signals between points on the ground. The users who employ these signals enjoy a broad spectrum of telecommunication services on the ground, at sea, and in the air. In recent years, such systems have become practical to the point where a typical household can have its own satellite dish. That dish can receive a broad range of television programming and provide broadband access to the Internet. Key words: satellite, antenna, Earth orbit (GEO), transponder, VHF, frequency modulation (FM)

APA, Harvard, Vancouver, ISO, and other styles

6

Shaw, Brian M. "Book Review: Satellite Communication Systems." International Journal of Electrical Engineering & Education 30, no. 4 (October 1993): 380–81. http://dx.doi.org/10.1177/002072099303000419.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Jibrail, W. "Book reviews - Satellite communication systems." IEEE Communications Magazine 25, no. 8 (August 1987): 61. http://dx.doi.org/10.1109/mcom.1987.1093678.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Rosenberg, C. "Satellite communication systems [Book Review]." IEEE Communications Magazine 38, no. 6 (June 2000): 46–50. http://dx.doi.org/10.1109/mcom.2000.846074.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Norbury, J. R. "Satellite land mobile communication systems." Electronics & Communications Engineering Journal 1, no. 6 (1989): 245. http://dx.doi.org/10.1049/ecej:19890051.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Johnston, E. C. "Satellite Communication Systems (2nd edn.)." Electronics & Communications Engineering Journal 3, no. 6 (1991): 289. http://dx.doi.org/10.1049/ecej:19910047.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Pichugin, S. B. "Simplest Flow Queuing Models for LEO Satellite System." Proceedings of Higher Educational Institutions. Маchine Building, no. 1 (742) (January 2022): 61–70. http://dx.doi.org/10.18698/0536-1044-2022-1-61-70.

Full text

Abstract:

The relevance of the work is associated with the active deployment of low-orbit communication systems and the expansion of research in the field of corresponding satellite systems. A promising low-orbit communication system based on relay satellites with the function (RSRFs) of routing message packets is considered. The low earth orbit communications systems use the BGP protocol and the AAA functionality at the ground station. For assessing the characteristics of RSRF inter-satellite paths, a scenario was created for the message packets arrival from a group of inter-satellite paths to one subscriber path. The corresponding analytical models have been developed using the mathematical apparatus of queuing systems with the simplest flows of requests and exponential distribution of the service time. The RSRF characteristics of a promising low-orbit communication system are predicted. It is proposed to make the mathematical apparatus of analytical models more complicated to take into account the dynamics of displacements and failures of the RSRF in a low-orbit communication system.

APA, Harvard, Vancouver, ISO, and other styles

12

SEO, KYUNG-RYONG, and KYU-HO PARK. "TASK ASSIGNMENT IN HOST-SATELLITE SYSTEMS." Journal of Circuits, Systems and Computers 06, no. 03 (June 1996): 213–25. http://dx.doi.org/10.1142/s0218126696000170.

Full text

Abstract:

This paper deals with the problem of assigning task modules of a program over a multiple computer system such that the sum of execution and communication costs is minimized. If the number of processors is two, this problem can be solved efficiently using the network flow approach pioneered by Stone.13 However, the general n-processor problem (n>3) in a fully connected system is known to be NP-complete.14 A host-satellite system considered in this paper is composed of a powerful host processor p0 and N homogeneous satellite processors pk’s, 1≤k≤N, in which each satellite processor pk is connected to the host processor p0 through a communication link. When any two satellite processors are to communicate with each other, the host processor p0 must participate in the communication. Therefore, the interprocessor communication cost per unit of information transferred between any two satellite processors is twice as much as that between a satellite processor and the host processor p0. In this paper, we propose an algorithm which finds an optimal assignment on a host-satellite system in polynomial time. A task assignment problem for a host-satellite system is first transformed into a network flow problem, and then solved by applying the well known network flow algorithm in time no worse than O(NM3), where N and M are the number of satellites and the number of modules, respectively.

APA, Harvard, Vancouver, ISO, and other styles

13

Vilderman, E. N. "Hyperphase Modulation in Satellite Communication Systems." Rocket-space device engineering and information systems 7, no. 3 (2020): 36–41. http://dx.doi.org/10.30894/issn2409-0239.2020.7.3.36.41.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Chambers, B. "Book Review: Satellite Communication Systems Engineering." International Journal of Electrical Engineering & Education 23, no. 4 (October 1986): 374. http://dx.doi.org/10.1177/002072098602300427.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Brussaard, G., and D. V. Rogers. "Propagation considerations in satellite communication systems." Proceedings of the IEEE 78, no. 7 (July 1990): 1275–82. http://dx.doi.org/10.1109/5.56938.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Ananasso, Fulvio, and Francesco Delli Priscoli. "Satellite systems for personal communication networks." Computer Standards & Interfaces 20, no. 6-7 (March 1999): 423. http://dx.doi.org/10.1016/s0920-5489(99)90834-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Almalki, Faris A., and Soufiene Ben Othman. "Predicting Joint Effects on CubeSats to Enhance Internet of Things in GCC Region Using Artificial Neural Network." Mobile Information Systems 2021 (November 25, 2021): 1–16. http://dx.doi.org/10.1155/2021/1827155.

Full text

Abstract:

Satellite telecommunication systems promise to bridge digital gaps and deliver wireless communication services to any corner of the world. However, despite satellites’ global connectivity and wide footprint, still atmospheric and dust impairments are open challenges that face satellite systems, especially at high-frequency bands in arid and semiarid regions. Therefore, this paper aims to predict joint effects of atmospheric and dust attenuations in Gulf Cooperation Council (GCC) countries on CubeSat communications using Artificial Neural Network (ANN). The prediction model has been carried out using a massive Multiple-Input Multiple-Output (MIMO) antenna payload at K-frequency Bands. Consider these joint effects have positive relations in calculating satellites link margin, which leads to obtaining efficient communication system, delivering better quality of service (QoS), and enhancing Internet of Things (IoT) connectivity, or even Internet of Space Things (IoST). Predicated results infer that the ANN attenuation predictions, along with the 5G MIMO antenna on-board the CubeSat, offer much promise channel model for satellite communications, which in turn leads to not only supporting IoT connectivity but also reducing power consumption, thus enhancing lifetime of CubeSat. Also, this study can provide a reference for CubeSat engineers to guarantee large-capacity communication.

APA, Harvard, Vancouver, ISO, and other styles

18

Kong, Bo, Wei Heng Dai, Xiao Jie, and Fei Hong Dong. "Research on Coded Cooperative Strategy in Satellite Communications." Applied Mechanics and Materials 198-199 (September 2012): 1684–89. http://dx.doi.org/10.4028/www.scientific.net/amm.198-199.1684.

Full text

Abstract:

Aiming at the satellite mobile communication, the cooperative communication technology is applied to the forward downlink in this paper, and one scheme with two satellites based on the coded cooperative which used the Alamouti space time block code is presented. Simulation results show the coded cooperative strategy can obtain better performance than the traditional uncoded systems, which is lower than the MIMO system with two transmit antennas and one receive antenna based on the Alamouti code, but the power of the terminal was decreased. It has the advantage in communication range and low complex mobile terminal, which has a certain application prospects in satellite mobile communications in the future.

APA, Harvard, Vancouver, ISO, and other styles

19

Vizzarri, Alessandro, Franco Mazzenga, and Romeo Giuliano. "Future Technologies for Train Communication: The Role of LEO HTS Satellites in the Adaptable Communication System." Sensors 23, no. 1 (December 21, 2022): 68. http://dx.doi.org/10.3390/s23010068.

Full text

Abstract:

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 systems in the rail sectors, such as Adaptable Communication Systems (ACS) and Future Railway Mobile Communication Systems (FRMCS), can manage different bearers as 4G/5G terrestrial technologies and satellites. In this environment, the new High Throughput Satellite (HTS) Low-Earth Orbit (LEO) constellations promise very interesting performances from data rate and coverage points of view. The paper analyzes the LEO constellations of Starlink and OneWeb using public data. The Rome–Florence railway line is considered for simulations. The results evidence the LEO satellite can provide interesting performance in terms of visibility, service connectivity, and traffic capacities (up to 1 Gbps). This feature enables the LEO to fully manage a high amount of data, especially in the railway scenarios of the next years when video data applications will be more present.

APA, Harvard, Vancouver, ISO, and other styles

20

Cai, Bowen, Qianqian Zhang, Jungang Ge, and Weiliang Xie. "Resource Allocation for Cognitive LEO Satellite Systems: Facilitating IoT Communications." Sensors 23, no. 8 (April 11, 2023): 3875. http://dx.doi.org/10.3390/s23083875.

Full text

Abstract:

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 satellite spectrum and the high cost of designing satellites, it is difficult to launch a dedicated satellite for IoT communications. To facilitate IoT communications over LEO SatCom, in this paper, we propose the cognitive LEO satellite system, where the IoT users act as the secondary user to access the legacy LEO satellites and cognitively use the spectrum of the legacy LEO users. Due to the flexibility of code division multiple access (CDMA) in multiple access and the wide use of CDMA in LEO SatCom, we apply CDMA to support cognitive satellite IoT communications. For the cognitive LEO satellite system, we are interested in the achievable rate analysis and resource allocation. Specifically, considering the randomness of spreading codes, we use the random matrix theory to analyze the asymptotic signal-to-interference-plus-noise ratios (SINRs) and accordingly obtain the achievable rates for both legacy and IoT systems. The power of the legacy and IoT transmissions at the receiver are jointly allocated to maximize the sum rate of the IoT transmission subject to the legacy satellite system performance requirement and the maximum received power constraints. We prove that the sum rate of the IoT users is quasi-concave over the satellite terminal receive power, based on which the optimal receive powers for these two systems are derived. Finally, the resource allocation scheme proposed in this paper has been verified by extensive simulations.

APA, Harvard, Vancouver, ISO, and other styles

21

Ma, Ji, Rui Kang, Ruiying Li, Qingyuan Zhang, Liang Liu, and Xuewang Wang. "Uncertainty Theory-Based Resilience Analysis for LEO Satellite Communication Systems." Symmetry 14, no. 8 (July 29, 2022): 1568. http://dx.doi.org/10.3390/sym14081568.

Full text

Abstract:

Resilience, the ability of a system to withstand disruptions and quickly return to a normal state, is essential for a low-Earth-orbit satellite communication system (LEO-SCS), as its large number of satellites, may encounter various disturbances. As a developing system with asymmetrical and insufficient data, it is with both aleatory and epistemic uncertainties, which renders existing resilience measures inapplicable. This paper utilizes uncertainty theory to define belief instantaneous availability, based on which a new resilience measure for the LEO-SCS is proposed. As the resilience is mainly determined by the dynamic and uncertain characteristics of an LEO-SCS, an uncertain satellite network evolution model is developed to describe its operating patterns, and an evaluation method is proposed to estimate its resilience. To illustrate our proposed uncertain theory-based resilience evaluation method, an LEO-SCS case with 48 satellites is studied, and its resilience values under different backup strategies are compared to assist in system design decisions.

APA, Harvard, Vancouver, ISO, and other styles

22

Zhou, Li. "Optical System in Laser Inter-Satellites Communication." Advanced Materials Research 945-949 (June 2014): 2213–16. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.2213.

Full text

Abstract:

We know that Inter-satellites communica-tion is a very important to us.However, real global coverage can only be achieved by satellite systems. Satellites communication is the most important mean of the communication network. The traditional satellites communication and inter-satellites links are built by microwave. Recent years, laser links for inter-satellites communication are becoming more and more important.

APA, Harvard, Vancouver, ISO, and other styles

23

Richardson, Caleb, Mark Reith, and Wayne Henry. "Ensuring the Security of Space Systems from Eavesdropping Attacks." International Conference on Cyber Warfare and Security 17, no. 1 (March 2, 2022): 522–26. http://dx.doi.org/10.34190/iccws.17.1.65.

Full text

Abstract:

In a day and age where satellite communications are more important than ever to ensure global communication, establish international military power, and support our everyday way of life, satellite security must be at the forefront of innovation. However, eavesdropping attacks pose a serious threat to satellite communication systems that have not been adequately addressed. An eavesdropping attack threatens to put sensitive data in the wrong hands or even jeopardize critical missions. Research is needed to explore why defense against eavesdropping attacks is crucial, particularly for satellite systems. Three potential solutions to the problem are presented, addressing different challenges. Realistic solutions to the eavesdropping threat are needed urgently to defend the space domain from malicious threats.

APA, Harvard, Vancouver, ISO, and other styles

24

Trotsko, Oleksandr. "Analysis of ways to improve the efficiency of modern satellite communication systems." Technology audit and production reserves 3, no. 2(65) (June 30, 2022): 51–56. http://dx.doi.org/10.15587/2706-5448.2022.260346.

Full text

Abstract:

Nowadays, the satellite segment in telecommunications occupies an important place and provides positioning of the global coverage system. However, the development of satellite technologies, compared to terrestrial wireless technologies, is slow. For example, the new DVB-S2 (Digital Video Broadcasting via Satellite) satellite standard contains a small number of improvements and refinements over the previous DVB-S standard. The main improvements are the introduction of codes with low density of LDPC (Low Density Parity Check) and the introduction of adaptive modulation and coding. Given the above, the object of research is modern satellite communication system. The subject of the research is the way to increase the efficiency of modern satellite communication systems. The research aims to analyze the feasibility of using a number of effective technologies in modern wireless systems, such as OFDM, UWB and MIMO, in satellite communication systems. The implementation of the considered options for the use of MIMO technology in satellite communication systems will increase the bandwidth and efficiency of these systems. However, there is a need for additional research to adapt this technology in satellite communication systems. Thus, the analysis allows forming the main directions of improving the efficiency of modern satellite communication systems. This analysis allows: – to formulate new approaches to increase the efficiency of modern satellite communication systems; – to substantiate new technological solutions for the construction of transceivers of satellite communication systems; – to identify possible areas of research to improve the efficiency of modern satellite communication systems.

APA, Harvard, Vancouver, ISO, and other styles

25

Dai, Tianfang. "APR Reduction Technique based on OFDM Pilot Filter Bank Limiting for Satellite Mobile Communications." MATEC Web of Conferences 246 (2018): 03002. http://dx.doi.org/10.1051/matecconf/201824603002.

Full text

Abstract:

Combined with OFDM (Orthogonal Frequency Division Multiplexing), satellite mobile communications will effectively achieve on-demand communication in areas with an ultra-low density of users. With OFDM multiple access optimization, the bandwidth utilization efficiency can be increased by 5 to 10 times. However, satellites are power-constrained systems, so higher PAPR requires greater power backoff, resulting in a decline in satellite transmission capacity. To use OFDM technology in satellites, there are problems such as reduced transmission capacity resulted from high PAPR, complication of lowering PAPR, and difficulty in hardware implementation. In order to deal with the problem of high bit error rate and hardware implementation difficulties in PAPR reduction technique of non-orthogonal frequency division multiplexing, this paper proposes a limiting PAPR reduction technique with OFDM pilot filter banks for satellite mobile communications. Firstly, the applicability of OFDM in satellite mobile communications is analyzed, and the influence of high PAPR on satellite power utilization and the influence of frequency shift sensitivity on inter-satellite communication interference are obtained. Then design the PAPR reduction technique based on the pilot filter bank. By setting the tunable filter bank to the pilot, the sideband power suppression in the OFDM frequency domain is realized, and the PAPR of the OFDM signal is reduced. Finally, the experimental results show that the PAPR performance is improved by 3dB without reducing the bit error rate.

APA, Harvard, Vancouver, ISO, and other styles

26

Strizhachenko, Alexander Vladimirovich, and Sergey Nikolayevich Shulga. "Narrow-band filter for satellite communication systems." International Journal of Informatics and Communication Technology (IJ-ICT) 10, no. 3 (December 1, 2021): 198. http://dx.doi.org/10.11591/ijict.v10i3.pp198-203.

Full text

Abstract:

Design narrow-band compact filters, based on high-quality waveguide-dielectric resonators with anisotropic materials is the subject of this paper. Filter represents a segment of a rectangular waveguide rotated around the longitudinal axis of the waveguide 90 degrees and containing one or more dielectric inserts that completely fill the resonator along the narrow wall of the waveguide and partially along the wide one. A distinctive feature of the proposed filter is higher slope steepness of the amplitude-frequency characteristic, and high manufacturability in the centimeter range. The designed narrow-band filter satisfies contradictory requirements: it combines narrow bandwidth (≈ 0.1% of center frequency <em>f</em><sub>0</sub>) with low passband insertion loss (≤ 1 dB).

APA, Harvard, Vancouver, ISO, and other styles

27

MIYASAKA, Akihiro. "Technology Trends for Communication Satellite Antenna Systems." Journal of the Institute of Electrical Engineers of Japan 137, no. 3 (2017): 166–69. http://dx.doi.org/10.1541/ieejjournal.137.166.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Del re, E., and R. Fantacci. "Multicarrier demodulator for digital satellite communication systems." IEE Proceedings I Communications, Speech and Vision 136, no. 3 (1989): 201. http://dx.doi.org/10.1049/ip-i-2.1989.0029.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Perrotta, G., G. Losquadro, and R. Giubilei. "Satellite communication systems for domestic/business services." International Journal of Satellite Communications 5, no. 2 (April 1987): 85–103. http://dx.doi.org/10.1002/sat.4600050207.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Zhang, Yuanyuan, and Zhibo Zhai. "An efficient and provably secure key agreement scheme for satellite communication systems." PLOS ONE 16, no. 4 (April 26, 2021): e0250205. http://dx.doi.org/10.1371/journal.pone.0250205.

Full text

Abstract:

Satellite communication has played an important part in many different industries because of its advantages of wide coverage, strong disaster tolerance and high flexibility. The security of satellite communication systems has always been the concern of many scholars. Without authentication, user should not obtain his/her required services. Beyond that, the anonymity also needs to be protected during communications. In this study, we design an efficient and provably secure key agreement scheme for satellite communication systems. In each session, we replace user’s true identity by a temporary identity, which will be updated for each session, to guarantee the anonymity. Because the only use of lightweight algorithms, our proposed scheme has high performance. Furthermore, the security of the proposed scheme is proved in the real-or-random model and the performance analysis shows that the proposed scheme is more efficient than some other schemes for satellite communication systems.

APA, Harvard, Vancouver, ISO, and other styles

31

Solyman, Ahmad A. A., and Ismail A. Elhaty. "Potential key challenges for terahertz communication systems." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 4 (August 1, 2021): 3403. http://dx.doi.org/10.11591/ijece.v11i4.pp3403-3409.

Full text

Abstract:

The vision of 6G communications is an improved performance of the data rate and latency limitations and permit ubiquitous connectivity. In addition, 6G communications will adopt a novel strategy. Terahertz (THz) waves will characterize 6G networks, due to 6G will integrate terrestrial wireless mobile communication, geostationary and medium and low orbit satellite communication and short distance direct communication technologies, as well as integrate communication, computing, and navigation. This study discusses the key challenges of THz waves, including path losses which is considered the main challenge; transceiver architectures and THz signal generators; environment of THz with network architecture and 3D communications; finally, Safety and health issues.

APA, Harvard, Vancouver, ISO, and other styles

32

Soltus, Anatoliy, and Maksym Rud. "Prospects for the Application of the Global High-speed, Low Latency Broadband Satellite Internet in the Field of Road Transport." Central Ukrainian Scientific Bulletin. Technical Sciences, no. 4(35) (2021): 254–64. http://dx.doi.org/10.32515/2664-262x.2021.4(35).254-264.

Full text

Abstract:

The article examines the problems of navigation and communication with the use of satellite technologies in road transport in the context of the growth of globalization processes in the world economy and the transformations of freight transport technologies caused by a large-scale transition to transport with zero emissions and the development of unmanned vehicles. The paper discusses the principles of building a global high-speed broadband satellite Internet with low latency. Potential capabilities of technologies such as digital antenna arrays and laser communication channels used in such systems are analyzed. Also considered are the existing and potential problems, both technical with electromagnetic compatibility with existing satellite communication systems and between systems under construction or planning, and legal caused by changes in the principles of information transfer at the interstate level. The main players in the emerging market of high-speed satellite communications are considered and the parameters of the systems declared by them are described. The comparison of the current state of building satellite constellations of individual projects is carried out and the ability to implement the announced plans by individual companies is analyzed. The disadvantages that create obstacles for the introduction of high-speed satellite communications in road transport at the moment and the directions of their overcoming are highlighted. Considering the potential of satellite Internet systems, the current state of construction, as well as existing technical and legal restrictions, the introduction of reliable satellite communications will significantly speed up the transition to autonomous unmanned vehicles. In this regard, the most successful opportunities for the new communication technology will be able to realize the transport companies, which will simultaneously update the fleet of vehicles towards zero emissions and with unmanned technologies.

APA, Harvard, Vancouver, ISO, and other styles

33

Parker, R. Stephen, John L. Kent, and Karl B. Manrodt. "The usage of mobile communication systems in the trucking industry." Journal of Transportation Management 12, no. 1 (April 1, 2000): 49–56. http://dx.doi.org/10.22237/jotm/954547500.

Full text

Abstract:

This article reports the findings of a mobile communications survey mailed out to over 2,000 trucking firms. The findings indicate that 68% of respondents use some form of mobile communication system in their firm. Various types of mobile communication systems were reported, including two-way pagers, one-way pagers, cell phones, two-way radio, and satellite communications. Additionally, implementation decision factors for mobile communication systems were evaluated for both users and non-users of mobile communication systems.

APA, Harvard, Vancouver, ISO, and other styles

34

Blumberg, R. S., V. V. Sukhotin, and O. I. Sizykh. "Method of determining the coordinates of the radio signal source in satellite communication systems." Spacecrafts & Technologies 7, no. 1 (March 24, 2023): 60–67. http://dx.doi.org/10.26732/j.st.2023.1.07.

Full text

Abstract:

Telecommunications have penetrated deeply into all spheres of human activity. Due to the use of digital technologies, it has become possible to transmit and receive information of various kinds in one stream (not separately). Three geostationary satellites are sufficient to provide data transmission from anywhere in the world to another point using artificial Earth satellites. Data transmission systems using the satellite should contain at least two Earth Stations and a repeater of the communication satellite. There are no means of combating any types of artificial interference in the Earth Stations equipment. The jammer, an illegitimate user, can emit a signal from any point in space within a telecommunications satellite system. The paper provides an analysis of existing methods for determining the coordinates of a radio signal source, describes a method for determining the coordinates of an radio signal source (illegitimate user) in satellite telecommunications systems using a geostationary spacecraft. The development was based on a three-position virtual antenna array, the positions of which determined the base of an irregular tetrahedron, and the radio signal source itself was its vertex. In the course of the solution, canonical equations of straight lines in space were compiled, at the intersection point of which the source of the radio signal is located. The coordinates of the radio signal source were the roots of the system, when finding the unit vectors lying on these lines.

APA, Harvard, Vancouver, ISO, and other styles

35

Boran-Keshishyan, AL, AA Alekseev, and VV Popov. "Stability of radio loops covering navigation systems and communication systems." Journal of Physics: Conference Series 2061, no. 1 (October 1, 2021): 012073. http://dx.doi.org/10.1088/1742-6596/2061/1/012073.

Full text

Abstract:

Abstract The development of the concept of E-navigation in modern shipping makes it necessary to create very reliable lines for the transmission of information packets and the interchange of data via radio networks to a huge number of consumers, practically all over the world. With such a scale, radio communication must be extremely reliable and stable, which is provided by the planetary system of satellite communication channels. The study proposes a method of signal loops of satellite communication systems for diagnosing the quality of the radio path, which will allow quickly localizing the external causes of the deterioration of the linear stability of communication in the absence of deep diagnostics during the daily operation of radio transmitting equipment. The organization of an external loop will make it possible to make a more accurate spatial adjustment of the antenna system to the zone of stable traffic with an increase in the steepness of the guidance system characteristics according to its own signal returned from the loop from the satellite. The external loop allows for more precise tuning of the antenna system of the stations, relative to the “steepness” of your own signal and to localize the external causes of signal deterioration by applying the method of signal loops.

APA, Harvard, Vancouver, ISO, and other styles

36

HORI, TOSHIKAZU. "Antenna Technologies for Advanced Communication System. Antennas for Satellite Communication Systems." Journal of the Institute of Electrical Engineers of Japan 118, no. 10 (1998): 606–9. http://dx.doi.org/10.1541/ieejjournal.118.606.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

M. K., Arti. "Data Detection in Large MIMO Satellite Communication Systems." IEEE Wireless Communications Letters 10, no. 5 (May 2021): 1032–35. http://dx.doi.org/10.1109/lwc.2021.3056555.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Lin, Zhi, Min Lin, Jian Ouyang, Wei-Ping Zhu, Athanasios D. Panagopoulos, and Mohamed-Slim Alouini. "Robust Secure Beamforming for Multibeam Satellite Communication Systems." IEEE Transactions on Vehicular Technology 68, no. 6 (June 2019): 6202–6. http://dx.doi.org/10.1109/tvt.2019.2913793.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Evans, J. V. "Communication satellite systems for high-speed Internet access." IEEE Antennas and Propagation Magazine 43, no. 5 (2001): 11–22. http://dx.doi.org/10.1109/74.979363.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Arti, M. K., and Varun Jain. "Relay selection-based hybrid satellite-terrestrial communication systems." IET Communications 11, no. 17 (November 30, 2017): 2566–74. http://dx.doi.org/10.1049/iet-com.2016.1425.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Hwang, Min-Shiang, Chao-Chen Yang, and Cheng-Yeh Shiu. "An authentication scheme for mobile satellite communication systems." ACM SIGOPS Operating Systems Review 37, no. 4 (October 2003): 42–47. http://dx.doi.org/10.1145/958965.958970.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Abiodun, Adigunade. "Future remote sensing, meteorological and communication satellite systems." Photogrammetria 41, no. 1 (October 1986): 28–30. http://dx.doi.org/10.1016/0031-8663(86)90004-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Arti, M. K. "Channel Estimation and Detection in Satellite Communication Systems." IEEE Transactions on Vehicular Technology 65, no. 12 (December 2016): 10173–79. http://dx.doi.org/10.1109/tvt.2016.2529661.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Shark, L. K., T. J. Terrell, and R. J. Simpson. "Adaptive frame synchroniser for digital satellite communication systems." IEE Proceedings F Communications, Radar and Signal Processing 135, no. 1 (1988): 51. http://dx.doi.org/10.1049/ip-f-1.1988.0007.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Abdrabou, Mohammed, and T. Aaron Gulliver. "Authentication for Satellite Communication Systems Using Physical Characteristics." IEEE Open Journal of Vehicular Technology 4 (2023): 48–60. http://dx.doi.org/10.1109/ojvt.2022.3218609.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Kazama, Hiroshi, Tetsu Sakata, Shuzo Kato, and Tsutomu Saka. "Transmission power control for TDMA satellite communication systems." Electronics and Communications in Japan (Part I: Communications) 77, no. 8 (August 1994): 48–58. http://dx.doi.org/10.1002/ecja.4410770805.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Huang, Xinping. "A direct conversion receiver for satellite communication systems." International Journal of Satellite Communications and Networking 23, no. 2 (2005): 129–41. http://dx.doi.org/10.1002/sat.810.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Riva, Carlo G., Lorenzo Luini, Alberto Panzeri, Filippo Morandi, Laura Resteghini, Danilo De Donno, Christian Mazzucco, and Renato Lombardi. "A Clutter Loss Model for Satellite Communication Systems." Electronics 12, no. 1 (December 30, 2022): 186. http://dx.doi.org/10.3390/electronics12010186.

Full text

Abstract:

Buildings and vegetation in the proximity of a terrestrial base station induce a significant additional loss, typically referred to as “clutter loss”, which sums up to free space loss and atmospheric attenuation. Clutter loss is essentially due to the radiowave reflection and diffraction caused by buildings and vegetation, and tends to reduce the interference between terrestrial systems, such as upper 6 GHz (U6G), and satellite systems operating in the same frequency bands. In fact, for example, at low elevation angles, the clutter loss could reach some tens of dB in the U6G band. A novel clutter loss model in urban and suburban environments for frequencies up to 10 GHz is proposed. The model relies on the Monte Carlo simulation approach presented in Report ITU-R P.2402-0, but some limitations have been removed to extend its applicability to more complex scenarios and possibly increase its accuracy for U6G systems. An analytical approach is also proposed to model the clutter loss statistics obtained by properly fitting the obtained statistics for the cities of London and Melbourne. Finally, the proposed model is validated by comparing its results to those obtained by a commercial ray tracer.

APA, Harvard, Vancouver, ISO, and other styles

49

Stojce Ilcev, Dimov. "Implementation of innovative aeronautical communication, navigation and surveillance (CNS) systems." International Journal of Engineering & Technology 8, no. 4 (November 17, 2019): 572. http://dx.doi.org/10.14419/ijet.v8i4.30014.

Full text

Abstract:

This paper introduces implementation of innovative Satellite Communication, Navigation and Surveillance (CNS) systems in function of Global Satellite Augmentation System (GSAS) integrated by the current and new projected Regional Satellite Augmentation System (RSAS) worldwide. The satellite communication and navigation systems are presently in use, however the main aspect of any hypothetical RSAS network is implementation of satellite surveillance system employing previous and new CNS solutions for improved Air Traffic Control (ATC) and Air Traffic Management (ATM) in all phases of flight, approaching to airports and during landing. The CNS network also enhances safety and emergency systems, transport security and control of transportation freight, logistics and the security of the crew and passengers onboard aircraft. The proposals for modern multifunctional space segment, DVB-RCS network, RSAS infrastructure, Satellite Automatic Dependent Surveillance-Broadcast SADS-B system for surveillance and movement guidance and control are also discussed as special solutions in airports environments.

APA, Harvard, Vancouver, ISO, and other styles

50

Chenina, Hachemi, Djamel Benatia, and M’ Hamed Boulakroune. "New modeling approach of laser communication in constellation and through atmospheric disturbances." Bulletin of Electrical Engineering and Informatics 10, no. 4 (August 1, 2021): 2088–99. http://dx.doi.org/10.11591/eei.v10i4.2792.

Full text

Abstract:

Laser communication between satellites in the constellation and from the satellites to ground stations offers a gigantic data rate for the users. This principal advantage drives telecom companies to develop this technology to use it like a carrier signal, the most disadvantage of this technology is the need to very complicated pointing systems between the transmitter and the receiver due to a very small beam divergence, continually moving of satellites in orbits and the distance between the satellites (tens of thousands of kilometers). The laser beam suffers continuously from several factors like atmospheric turbulences, internal and external vibrations. All these factors lead to an increase in the bit errors rate and cause degradation in the communication quality. This paper deals with a new method of modelisation of external effects in transmission of signal light from a ground station to the satellite through atmospheric disturbances. Indeed, an in-depth investigation, of the influences of satellite vibrationsinlaser signal transmission between satellites constellation, has been conducted by studying the effect of the intensity of vibrations on the optical signal amplitude. Some solutions are proposed to improve the efficiency of optical satellites communications.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Satellite communication systems'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles