Log in

Relevant bibliographies by topics / Satellite communications / Journal articles

To see the other types of publications on this topic, follow the link: Satellite communications.

Journal articles on the topic 'Satellite communications'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 June 2024

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

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Satellite communications.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Torikai, Tsutomu. "Satellite application technology on communications; Data communication via communications satellite." Journal of the Institute of Television Engineers of Japan 43, no. 9 (1989): 913–15. http://dx.doi.org/10.3169/itej1978.43.913.

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

Radhakrishnan, Radhika, Qing-An Zeng, and William E. Edmonson. "Inter-Satellite Communications for Small Satellite Systems." International Journal of Interdisciplinary Telecommunications and Networking 5, no. 3 (July 2013): 11–22. http://dx.doi.org/10.4018/jitn.2013070102.

Full text

Abstract:

Small satellite technology has opened a new era in aerospace engineering by decreasing space mission costs, without greatly reducing the performance. The concept of formation flying using small satellites is becoming popular because of their potential to perform coordinated measurements of remote sensing space missions. The current state of art in satellite communications is a one hop link between satellite and ground station. Very little work has been done on inter-satellite communications. This paper aims to design and evaluate feasible MAC and routing layer protocols for distributed small satellite networks. The possibility to implement proposed MAC and routing protocols for two different formation flying patterns are investigated. To validate the authors’ proposed system model, they use extensive simulations to evaluate the performance of the system using throughput, access delay and end-to-end delay.

APA, Harvard, Vancouver, ISO, and other styles

4

Wu, W. W. "Satellite communications." Proceedings of the IEEE 85, no. 6 (June 1997): 998–1010. http://dx.doi.org/10.1109/5.598421.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Dundas, P. A. "Satellite communications." Proceedings of the IEEE 73, no. 8 (1985): 1342. http://dx.doi.org/10.1109/proc.1985.13292.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Johnston, E. C. "Satellite Communications." Electronics and Power 33, no. 1 (1987): 71. http://dx.doi.org/10.1049/ep.1987.0045.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Haworth, D. P. "Satellite Communications." Electronics & Communications Engineering Journal 3, no. 6 (1991): 289. http://dx.doi.org/10.1049/ecej:19910048.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Tozer, T. C., and D. J. Withers. "Satellite communications." IEE Proceedings F Communications, Radar and Signal Processing 133, no. 4 (1986): 317. http://dx.doi.org/10.1049/ip-f-1.1986.0054.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

He, Wang, Liu, Song, Zhou, Wang, Gao, et al. "Shipborne Acquisition, Tracking, and Pointing Experimental Verifications Towards Satellite-to-Sea Laser Communication." Applied Sciences 9, no. 18 (September 19, 2019): 3940. http://dx.doi.org/10.3390/app9183940.

Full text

Abstract:

Acquisition, tracking, and pointing (ATP) is a key technology in free space laser communication that has a characteristically high precision. In this paper, we report the acquisition and tracking of low-Earth-orbit satellites using shipborne ATP and verify the feasibility of establishing optical links between laser communication satellites and ships in the future. In particular, we developed a shipborne ATP system for satellite-to-sea applications in laser communications. We also designed an acquisition strategy for satellite-to-sea laser communication. In addition, a method was proposed for improving shipborne ATP pointing error. We tracked some stars at sea, achieving a pointing accuracy of less than 180μrad.We then acquired and tracked some low-Earth-orbit satellites at sea, achieving a tracking accuracy of about 20μrad. The results achieved in this work experimentally demonstrate the feasibility of ATP in satellite-to-sea laser communications.

APA, Harvard, Vancouver, ISO, and other styles

10

SHIMOSEKO, Sachio. "Satellite communications and satellite broadcasting." Journal of the Japan Society for Precision Engineering 57, no. 5 (1991): 782–86. http://dx.doi.org/10.2493/jjspe.57.782.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

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

12

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

13

Yang, Qiang. "One Early Warning and Traffic Control Method for Satellite Communication System and the Implement of Time Prediction Algorithm." Journal of Physics: Conference Series 2136, no. 1 (December 1, 2021): 012033. http://dx.doi.org/10.1088/1742-6596/2136/1/012033.

Full text

Abstract:

Abstract This article introduces an early warning and control method of user satellite communication traffic applied to satellite communication system. Due to the high communication cost of transportation satellites, in order to avoid high communication bills, the full-service ability to collect call data records (CDR) by Transportation Satellite Business Support System is required to provide early warning and business control over the four dimensions of voice, data, text messages, and package fees for satellite communications. At the same time, the system predicts the typical user behavior through the time series prediction Prophet algorithm, which serves as the default reminder rule to achieve full coverage of users.

APA, Harvard, Vancouver, ISO, and other styles

14

Ledesma, Oscar, Paula Lamo, Juan A. Fraire, María Ruiz, and Miguel A. Sánchez. "Architectural Framework and Feasibility of Internet of Things-Driven Mars Exploration via Satellite Constellations." Electronics 13, no. 7 (March 30, 2024): 1289. http://dx.doi.org/10.3390/electronics13071289.

Full text

Abstract:

This study outlines a technical framework for Internet of Things (IoT) communications on Mars, leveraging Long Range (LoRa) technology to connect Martian surface sensors and orbiting satellites. The designed architecture adapts terrestrial satellite constellation models to Martian environments and the specific needs of interplanetary communication with Earth. It incorporates multiple layers, including Martian IoT nodes, satellite linkage, constellation configuration, and Earth communication, emphasizing potential Martian IoT applications. The analysis covers four critical feasibility aspects: the maximum communication range between surface IoT nodes and orbiting satellites, the satellite constellation’s message processing capacity to determine IoT node volume support, the communication frequency and visibility of IoT nodes based on the satellite constellation arrangement, and the interplanetary data transmission capabilities of LoRa-based IoT devices. The findings affirm LoRa’s suitability for Martian IoT communication, demonstrating extensive coverage, sufficient satellite processing capacity for anticipated IoT node volumes, and effective data transmission in challenging interplanetary conditions. This establishes the framework’s viability for advancing Mars exploration and IoT in space exploration contexts.

APA, Harvard, Vancouver, ISO, and other styles

15

Pasternak, Yuri G., Vladimir A. Pendyurin, Kirill S. Safonov, and Sergey M. Fedorov. "Development of a phased array antenna powered by Rotman printed lens for a mobile satellite communication terminal." Physics of Wave Processes and Radio Systems 24, no. 2 (September 6, 2021): 88–102. http://dx.doi.org/10.18469/1810-3189.2021.24.2.88-102.

Full text

Abstract:

Connecting to the Internet whenever and wherever you travel is no longer a luxury. All people have the ability to connect to the Internet and share data away from home. Satellite communications are now an integral part of successful and high-quality communications. Satellite communications antennas are usually installed on mobile ground terminals. Due to its wide coverage and versatility, satellite communications are continuously improving and adapting to the telecommunications needs of many countries, despite the fact that broadband, Internet and fiber - optic communications are used almost everywhere. We know that more than 50 % of all satellites in orbit are communications satellites.

APA, Harvard, Vancouver, ISO, and other styles

16

Cui, Jun Xia, and Hu Li Shi. "A Novel Satellite Telephone Communication System Based on SIGSO Satellite." Applied Mechanics and Materials 446-447 (November 2013): 1642–46. http://dx.doi.org/10.4028/www.scientific.net/amm.446-447.1642.

Full text

Abstract:

In recent years, the coverage of terrestrial mobile communication network is more and more extensive, and the mobile phones have occupied the vast majority of voice communications in almost all countries. However, satellite voice communication system is still playing an irreplaceable role on the vast sea and the land area which are not covered by the land mobile communication network. The motion characteristics of the SIGSO satellites and its new demands and characteristics to the system are analyzed, and a novel very low rate satellite telephone system is put forward. The speech coding algorithms are studied, and a suitable speech coding algorithm and coding rate of 600bps is selected for the SIGSO satellite communication system. The overall design of the satellite voice communication network is given, including link budgets, network structure, system components, system signaling and so on. This satellite telephone system can get access to the PSTN network through ground gateway to achieve interoperability with the public network.

APA, Harvard, Vancouver, ISO, and other styles

17

Ruan, Xin. "Deep Learning Algorithms for BCH Decoding in Satellite Communication." Highlights in Science, Engineering and Technology 38 (March 16, 2023): 1104–15. http://dx.doi.org/10.54097/hset.v38i.6012.

Full text

Abstract:

Deep learning is widely used in various fields due to the advancement of algorithms, the enrichment of high-efficiency databases, and the increase in computing power. Especially in the satellite communication, the learning and parallel computing capabilities of neural networks make them ideal for decoding. Many researchers have recently applied deep learning neural networks to decode high-density parity check (HDPC) codes (such as BCH and RS code), improving the decoder’s performance. This review aims to provide general insights on applying neural network decoders to satellite communications. Due to the neural network’s learning ability, the neural network-based decoder can be trained to change the weights, thereby reducing the influence of non-white noise in satellite communications, such as the influence between the satellite and the terrestrial network and the mutual interference within the satellites. To compensate for non-white noise, shortest circles in Tanner graph and unreliable information, a decoder system model for satellite communication constructed by three neural networks is presented.

APA, Harvard, Vancouver, ISO, and other styles

18

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

19

Johnston, E. C. "Satellite Communications Systems." IEE Review 34, no. 2 (1988): 86. http://dx.doi.org/10.1049/ir:19880028.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Johnson, E. C. "Satellite Communications Systems." Electronics and Power 32, no. 7 (1986): 545. http://dx.doi.org/10.1049/ep.1986.0316.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Dyer, P. E. "Laser satellite communications." Optics & Laser Technology 20, no. 3 (June 1988): 164. http://dx.doi.org/10.1016/0030-3992(88)90050-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Everett, J. L. "Satellite Communications Systems." Journal of the Institution of Electronic and Radio Engineers 56, no. 8-9 (1986): 280. http://dx.doi.org/10.1049/jiere.1986.0118.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Wu, W. W., E. F. Miller, W. L. Pritchard, and R. L. Pickholtz. "Mobile satellite communications." Proceedings of the IEEE 82, no. 9 (1994): 1431–48. http://dx.doi.org/10.1109/5.317086.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Yavisya, Valerii, Olexandr Lysenko, Olena Tachinina, Sergiy Ponomarenko, and Ihor Sushyn. "PROTOTYPE OF COMMUNICATION SYSTEM FOR MARS EXPLORATION." InterConf, no. 14(113) (June 20, 2022): 448–58. http://dx.doi.org/10.51582/interconf.19-20.06.2022.046.

Full text

Abstract:

This manuscript proposes the creation of a communication and navigation system for researchers who need to move away from the base settlement on Mars. One of the main requirements for a communication system is its ease of deployment, so it will be advisable to use satellite facilities. For interplanetary expeditions, the cost of each kilogram of payload is very high, so it is important to ensure that the design of communications satellites is minimized by weight and size criteria. In view of this, one of the possible options for building a satellite communications system on Mars is to use a group consisting of a nanosatellites.

APA, Harvard, Vancouver, ISO, and other styles

25

Koukis, Georgios, and Vassilis Tsaoussidis. "Satellite-Assisted Disrupted Communications: IoT Case Study." Electronics 13, no. 1 (December 20, 2023): 27. http://dx.doi.org/10.3390/electronics13010027.

Full text

Abstract:

In recent years, the space industry has witnessed a resurgence, characterized by a notable proliferation of satellites operating at progressively lower altitudes, promising extensive global coverage and terrestrial-level data transfer speeds, while remaining cost-effective solutions. In particular, Wireless Sensor Networks (WSNs) can benefit from the wide coverage of space infrastructure due to their extensive deployment, disrupted communication nature, and the potential absence of terrestrial support. This study explored the utility of Low-Earth Orbit (LEO) satellite constellations as a communication infrastructure for interconnecting “smart” devices via ground stations in Internet of Things (IoT) scenarios. To this end, we designed and implemented a series of experiments conducted within the OMNeT++ simulator, utilizing an updated iteration of the original Open Source Satellite Simulator (OS3) framework. Our research encompassed an IoT Case Study, incorporating authentic sensor data sourced from the Smart Santander testbed. Throughout our experimentation, we investigated the impact of the constellation design parameters such as the number of satellites and orbital planes, as well as the inter-satellite link configuration on the obtained Round-Trip Time (RTT) and packet loss rates.

APA, Harvard, Vancouver, ISO, and other styles

26

Li, Qiuyuan, Shuquan Wang, and Long Zhang. "Design of Pointing Control Mechanism for Spacecraft Antenna Communication." Journal of Physics: Conference Series 2203, no. 1 (February 1, 2022): 012001. http://dx.doi.org/10.1088/1742-6596/2203/1/012001.

Full text

Abstract:

Abstract Satellite antennas are widely used in satellite communications and now have become an indispensable part of satellite. It affects and restricts the performance and functions of the entire wireless communication system. Flexible pointing and low power consumption are required for antennas installed on satellites, which makes the design of the pointing mechanism of the satellite antenna more challenging. This paper focuses on the design and analysis of the pointing control mechanism to help improve the flexibility of satellite communication. An optimized structure consisting of spring hinge mechanism, manipulator arm and universal adjustment mechanism is proposed. The material selection and mechanical analysis are also made. Finally, the pointing angle is described based on the mathematical model of the pointing control mechanism.

APA, Harvard, Vancouver, ISO, and other styles

27

Wei, Junyong, Jiarong Han, and Suzhi Cao. "Satellite IoT Edge Intelligent Computing: A Research on Architecture." Electronics 8, no. 11 (October 31, 2019): 1247. http://dx.doi.org/10.3390/electronics8111247.

Full text

Abstract:

As the number of satellites continues to increase, satellites become an important part of the IoT and 5G/6G communications. How to deal with the data of the satellite Internet of Things is a problem worth considering and paying attention to. Due to the current on-board processing capability and the limitation of the inter-satellite communication rate, the data acquisition from the satellite has a higher delay and the data utilization rate is lower. In order to use the data generated by the satellite IoT more effectively, we propose a satellite IoT edge intelligent computing architecture. In the article, we analyze the current methods of satellite data processing, combined with the development trend of future satellites, and use the characteristics of edge computing and machine learning to describe the satellite IoT edge intelligent computing architecture. Finally, we verify that the architecture can speed up the processing of satellite data. By demonstrating the performance of different neural network models in the satellite edge intelligent computing architecture, we can find that the lightweight of neural networks can promote the development of satellite IoT edge intelligent computing architecture.

APA, Harvard, Vancouver, ISO, and other styles

28

Ma, Lihua, Chao Hu, and Jun Pei. "Polarization Tracking Study of Earth Station in Satellite Communications." Earth Science Research 5, no. 1 (November 26, 2015): 10. http://dx.doi.org/10.5539/esr.v5n1p10.

Full text

Abstract:

Satellite communications, in telecommunications, the use of satellite can provide communications links between various points on the earth. Typical satellite communication is composed of a communication satellite, a signal transmitter and a signal receiver. As the signal transmitter or the signal receiver, an earth station plays a vital role in the satellite communications. Accurately adjustment of antenna azimuth, elevation and polarization angles on the earth station is the key to satellite communications. In the present paper, a study of polarization tracking of earth station is presented, and a detailed adjustment procession of the polarization angle is given. Combing with observation series of MEASAT-2 satellite in geostationary orbit, the polarization tracking accuracy is verified. The method can be embeded into computer program of antenna polarization adjustment in earth station.

APA, Harvard, Vancouver, ISO, and other styles

29

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

30

Li, H. J., Y. Lu, F. H. Dong, and R. Liu. "Communications Satellite Multi-Satellite Multi-Task Scheduling." Procedia Engineering 29 (2012): 3143–48. http://dx.doi.org/10.1016/j.proeng.2012.01.455.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Thacker, Keith. "Mobile satellite communications - current status of maritime systems." Aeronautical Journal 95, no. 950 (December 1991): 351–58. http://dx.doi.org/10.1017/s0001924000024295.

Full text

Abstract:

Any review of the development of maritime satellite communications is essentially the history of Inmarsat and its predecessor system, Marisat. With perhaps two qualifications, one might extend the definition to mobile satellite communications generally. In the land mobile satellite communications domain two companies, Geostar and Qualcomm, have also made their mark. Geostar was recently declared bankrupt but Qualcomm continues to go from strength to strength.We are frequently asked ‘what is Inmarsat?'. The term Inmarsat is generally used, and used herein, to mean the permanent staff (the Directorate), Land Earth Station (LES) operators, manufacturers and value-added service providers who offer mobile satellite communications products or services via the satellites and other infrastructure which makes up the Inmarsat system. It is, essentially, a partnership but within it there is also internal competition. LES operators compete in the provision of telecommunications services (quality is consistently high, but they each decide what services to offer and at what tariffs). Manufacturers compete to secure market dominance and profitabilty for their products. Not all will be equally successful. More than anything, Inmarsat is a global partnership dedicated to meeting mankind's need to communicate while on the move. It aims to do so cost-effectively and using satellites.

APA, Harvard, Vancouver, ISO, and other styles

32

Cui, Jun Xia, Hu Li Shi, Chang Lv, and Rui Zhu He. "SIGSO Satellite Tracking Characteristics of Large-Diameter Parabolic Antenna." Applied Mechanics and Materials 365-366 (August 2013): 1328–31. http://dx.doi.org/10.4028/www.scientific.net/amm.365-366.1328.

Full text

Abstract:

SIGSO satellite is a special kind of geosynchronous orbit communications satellites. Its orbit height is the same as geostationary orbit, but its inclination varies periodically and annually, with variation in the range of 0 ° to 15 °. When communication master station uses large-diameter antenna tracking SIGSO satellites, only a fraction of 1 degree of the antenna beam width is relatively small along with its inclination becomes bigger. Then which kind of tracking mode should be selected to keep precisely pointing to the SIGSO satellite becomes a very important issue. This paper takes Apstar-1 satellite as an example to analyze SIGSO satellites motion characteristics. Pros and cons of a 16-meter antenna with Truss-step tracking Apstar-1 satellite were studied and actual measurement was carried out in Beijing. Finally, mono-pulse tracking and turntable antenna mount is recommended which lays a good foundation for the system optimization design.

APA, Harvard, Vancouver, ISO, and other styles

33

Preet, Shiv. "Satellite Internet Communication: A Race with Contemporary Optical Fiber Network with the Help of SPT Algorithm." ECS Transactions 107, no. 1 (April 24, 2022): 33–43. http://dx.doi.org/10.1149/10701.0033ecst.

Full text

Abstract:

The internet is the backbone of today’s digital world. A cobweb of fiber optics/wireless towers have been spread all over the globe for internet access in every nook and corner of the globe. Though fiber optics is a very costly affair, major industries are still opting for fiber network instead of satellite communication. Satellites can be placed in three different orbits for connectivity. These are LEO, MEO, and GEO. Despite so much advancement in the space technologies, satellite broadband is still in its infancy stage. This paper reviews why fiber optics have been the choice of technology giants instead of satellite communications. This paper also discusses various difficulties in implementation of satellite broadband and the implementation of the Starlink project for satellite broadband. This paper also sheds light on how the SPT (Squeeze Pack and Transfer) compression algorithm helps in improving internet implementation using satellite communication.

APA, Harvard, Vancouver, ISO, and other styles

34

Sloan, Elinor. "Communications satellites in Canadian security policy: History and prospects." International Journal: Canada's Journal of Global Policy Analysis 76, no. 2 (May 18, 2021): 204–20. http://dx.doi.org/10.1177/00207020211016476.

Full text

Abstract:

This article traces Canada’s early interest in space, before turning to its late 1960s decision to focus on a domestic, commercial/civilian communications satellite system in geostationary orbit and the subsequent decline in Canada’s military space efforts. It then highlights the wake-up call of the 1991 Gulf War, which demonstrated the critical importance of military communications satellites to future operations, and the steps Canada has taken to gain assured access to such satellites in the decades since. The final section outlines recent advances in low Earth orbit satellite communications (LEO satcom) and the ways in which these systems can address shortfalls in their geostationary cousins. Drawing reference to a new international security environment, it concludes that Canada should move expeditiously to incorporate LEO satcom into efforts to address the growing imperative of military satellite communications in the Canadian Arctic.

APA, Harvard, Vancouver, ISO, and other styles

35

Ito, Nobuyuki. "Satellite Communications - Inmarsat FX." Marine Engineering 57, no. 2 (March 1, 2022): 215–20. http://dx.doi.org/10.5988/jime.57.215.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Koehler, J. "Satellite communications - International considerations." IEEE Communications Magazine 25, no. 1 (January 1987): 33–35. http://dx.doi.org/10.1109/mcom.1987.1093429.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Kucar, A. "Book reviews - Satellite communications." IEEE Communications Magazine 25, no. 4 (April 1987): 72–73. http://dx.doi.org/10.1109/mcom.1987.1093573.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Luglio, M. "Mobile multimedia satellite communications." IEEE Multimedia 6, no. 4 (October 1999): 10–14. http://dx.doi.org/10.1109/mmul.1999.809228.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Johnston, E. C. "Satellite Communications Systems Engineering." Electronics and Power 32, no. 9 (1986): 681. http://dx.doi.org/10.1049/ep.1986.0405.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

AGRAWAL, BRIJ N. "High Latitude Communications Satellite." Naval Engineers Journal 105, no. 4 (July 1993): 133–42. http://dx.doi.org/10.1111/j.1559-3584.1993.tb02315.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Greenberg, Joel S. "Communications satellite business ventures." Space Policy 2, no. 1 (February 1986): 37–51. http://dx.doi.org/10.1016/0265-9646(86)90008-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Ashiya, R. "Developments in Satellite Communications." IETE Technical Review 15, no. 5 (September 1998): 319–30. http://dx.doi.org/10.1080/02564602.1998.11416766.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Cummings, D., and C. G. Wildey. "Military aeronautical satellite communications." IEE Proceedings F Communications, Radar and Signal Processing 133, no. 4 (1986): 411. http://dx.doi.org/10.1049/ip-f-1.1986.0066.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Mahle, C. E., B. D. Geller, J. R. Potukuchi, and G. Hyde. "Advanced communications satellite technology." IEEE Aerospace and Electronic Systems Magazine 3, no. 11 (November 1988): 3–10. http://dx.doi.org/10.1109/62.17924.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Golding, L. S., and L. C. Palmer. "Personal communications by satellite." International Journal of Satellite Communications 10, no. 5 (September 1992): 283–91. http://dx.doi.org/10.1002/sat.4600100513.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Jackson, Bruce P. "Mobile satellite EMS communications." American Journal of Emergency Medicine 13, no. 1 (January 1995): 110. http://dx.doi.org/10.1016/0735-6757(95)90274-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Cao, Lei, and Xing Yang. "Research on the Convergence Application of Satellite Mobile Communication and Wireless Ad Hoc Network." Journal of Physics: Conference Series 2187, no. 1 (February 1, 2022): 012056. http://dx.doi.org/10.1088/1742-6596/2187/1/012056.

Full text

Abstract:

Abstract The article analyzes the networking modes and main features of satellite mobile communications and wireless ad hoc networks, and proposes to build a dual-function terminal of satellite mobile communications and wireless ad hoc networks. By merging the respective advantages of the two communication modes, the application range of satellite mobile communication can be further expanded, and finally exemplified typical application scenarios.

APA, Harvard, Vancouver, ISO, and other styles

48

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

49

Zhang, Yu, Shuangrui Zhao, Ji He, Yuanyu Zhang, Yulong Shen, and Xiaohong Jiang. "A Survey of Secure Communications for Satellite Internet Based on Cryptography and Physical Layer Security." IET Information Security 2023 (October 26, 2023): 1–15. http://dx.doi.org/10.1049/2023/5604802.

Full text

Abstract:

Satellite internet serves as an indispensable component of the upcoming sixth-generation networks for providing global broadband internet access service. Due to the open nature of satellite-ground communication, security issue in satellite internet has always been an important concern for both industry and academia. Although many researchers focus on secure communications in satellite internet, the literature is surprisingly sparse, with no comprehensive overview of the state-of-the-art security techniques. This paper provides an in-depth survey of secure communications for various satellite internet scenarios. Based on different security mechanisms, we first categorize the existing works of secure communications in satellite internet into two categories: cryptography-based and physical layer security-based. The former includes classical encryption-based and quantum encryption-based secure communication, and the latter is further divided into precoding-based, cooperative jamming-based, relay selection-based, and physical-layer authentication-based secure communication depending on the applied techniques. Finally, we provide some future research directions.

APA, Harvard, Vancouver, ISO, and other styles

50

Butash, Tom, Peter Garland, and Barry Evans. "Non‐geostationary satellite orbit communications satellite constellations history." International Journal of Satellite Communications and Networking 39, no. 1 (August 27, 2020): 1–5. http://dx.doi.org/10.1002/sat.1375.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!