scholarly journals Development of a phased array antenna powered by Rotman printed lens for a mobile satellite communication terminal

2021 ◽  
Vol 24 (2) ◽  
pp. 88-102
Author(s):  
Yuri G. Pasternak ◽  
Vladimir A. Pendyurin ◽  
Kirill S. Safonov ◽  
Sergey M. Fedorov
Keyword(s):  
Satellite Communication ◽  
Satellite Communications ◽  
The Internet ◽  
Fiber Optic Communications ◽  
Phased Array Antenna ◽  
Broadband Internet ◽  
Almost Everywhere ◽  
Share Data ◽  
Mobile Satellite ◽  
Mobile Satellite Communication

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.

THE MAIN DIRECTIONS OF THE CONCEPT OF COMMUNICATIONS IN A LOW-ORBIT RELAY SATELLITES COMMUNICATION SYSTEM

2021 ◽  
Author(s):  
И.Н. ПАНТЕЛЕЙМОНОВ ◽  
А.А. МОНАСТЫРЕНКО ◽  
А.В. БЕЛОЗЕРЦЕВ ◽  
В.В. БОЦВА ◽  
Л.В. ЩЕРБАТЫХ ◽  
...  
Keyword(s):  
Communication System ◽  
Information Exchange ◽  
Satellite Communication ◽  
Satellite Communications ◽  
Broadband Access ◽  
Transmission Networks ◽  
Mobile Satellite ◽  
Access To Data ◽  
Subscriber Terminal ◽  
Mobile Satellite Communication

Рассмотрены проблемы организации связи в системе персональной подвижной спутниковой связи (СППСС) на низкоорбитальных спутниках-ретрансляторах для обеспечения широкополосного доступа к сетям передачи данных с применением небольшого персонального абонентского терминала (АТ). Дан краткий анализ существующих СППСС, определены требования к системе связи,представлены основные направления организации информационного обмена,предложенорешение создания АТ. The paper is devoted to the problems of communication organization in the low-orbit personal mobile satellite communication system for providing broadband access to data transmission networks using a small personal subscriber terminal. A brief analysis of the existing systems of personal mobile satellite communications is given, the requirements for the communication system are defined, the main directions of information exchange organization are considered, and a solution for creating a subscriber terminal is proposed.

ASSESSMENT OF RUSSIA'S REAL NEEDS FOR MOBILE SATELLITE COMMUNICATIONS SERVICES

2021 ◽  
Author(s):  
В.С. АЛЕШИН ◽  
С.Г. ДОГАЕВ
Keyword(s):  
Satellite Communication ◽  
Arctic Region ◽  
Satellite Communications ◽  
Communication Services ◽  
Russian Economy ◽  
Northern Sea Route ◽  
Communications Services ◽  
The Russian Federation ◽  
Mobile Satellite ◽  
Mobile Satellite Communication

Приведена количественная оценка реальных потребностей Российской Федерации в услугах подвижной спутниковой связи на период 2021-2030 гг. Оценка выполнялась путем прямого подсчета численности потенциальных потребителей услуг в разных сферах народного хозяйства России, включая ее Арктический регион и Северный морской путь, с учетом возможностей реализации альтернативных спутниковым вариантов предоставления этих услуг. A quantitative assessment of the real needs of the Russian Federation for mobile satellite communication services in 2021-2030 is presented. The assessment was carried out by directly calculating the number of potential consumers of services in various areas of the Russian economy, including its Arctic region and the Northern Sea Route, taking into account the possibilities of implementing alternative economic options for providing these services.

Joint Selection of OFDM Parameters in Mobile Satellite Communications

2013 ◽  
Vol 385-386 ◽  
pp. 1586-1590
Author(s):  
Jia Jia Wang ◽  
Cheng Mei Li ◽  
Bin Li ◽  
Hao Chang ◽  
Jian Jun Wu
Keyword(s):  
Satellite Communication ◽  
Doppler Frequency ◽  
Satellite Communications ◽  
System Capacity ◽  
Delay Spread ◽  
Numeric Calculation ◽  
Mobile Satellite ◽  
The Impact ◽  
Mobile Satellite Communication ◽  
Selection Of

In mobile satellite communication based on OFDM technology, the system performance can’t be optimal if the cyclic prefix (CP) length and subcarrier interval of LTE specification are transplanted into mobile satellite communication directly. In this paper, we analyze the impact of inter symbol interference (ISI) and inter carrier interference (ICI) which are caused by multipath delay spread and Doppler frequency shift separately on system capacity, and derive the optimal CP length and subcarrier interval for GEO, MEO and LEO mobile satellite communication by numeric calculation. Finally, the simulation results show that the OFDM parameters of LTE specification can be used in GEO mobile satellite communications, but cannot in MEO and LEO.

An Energy-Efficient Coding in Mobile Satellite Communications

2014 ◽  
Vol 556-562 ◽  
pp. 4887-4892
Author(s):  
Geng Run Wang ◽  
Bang Ning Zhang ◽  
Ai Jun Liu ◽  
Dao Xing Guo ◽  
Jin Gang Wang
Keyword(s):  
Satellite Communication ◽  
Satellite Communications ◽  
Space Time ◽  
Space Time Coding ◽  
Satellite Channels ◽  
Time Coding ◽  
Analytical Result ◽  
Mobile Satellite ◽  
Mobile Satellite Communication ◽  
Diversity Gains

Diversity gains are believed to improve the transmission reliability in fading mobile satellite channels. Considering that the traditional Space-Time Coding (STC) is not suitable for the cooperative mobile satellite communication, in this paper a new cooperative mobile satellite communication system is proposed based on the Dynamic Space-Time Coding (D-STC). The transmit energy of the propose scheme is saved by avoiding forwarding erroneous signals in cooperative users. Meanwhile, the system benefits from diversity gains and the transmission is robust. Finally, the analytical result is validated by numerical simulations.

Obstacles to the Establishment of Mobile Satellite Communications

1973 ◽  
Vol 26 (2) ◽  
pp. 145-151
Author(s):  
D. O. Fraser
Keyword(s):  
Western Europe ◽  
Satellite Communication ◽  
Satellite Communications ◽  
Space Technology ◽  
Satellite Systems ◽  
Work Sharing ◽  
Commercial Space ◽  
Electrical Engineers ◽  
Mobile Satellite ◽  
Mobile Satellite Communication

The present deadlock between Western Europe and U.S.A. reflects a difference in emphasis on motivation largely traceable to the space technology gap. The problem is to establish institutional and work sharing arrangements bridging U.S. desire for early commercial space exploitation and European desire to promote its industrial space techology. The European approach is compatible with I.C.A.O. and I.A.T.A. preference for a non-operational experimental first phase Aerosat programme, and unless a compromise with U.S.A. is reached the best solution may be a European E.S.R.O. programme able to cater for the experimental mobile satellite communication system requirements of both aviation and shipping. The paper was presented at the Conference on Aeronautical and Maritime Satellite Systems held in London on 13–15 March and sponsored jointly by the Institution of Electrical Engineers with this Institute, the Institution of Electronic and Radio Engineers and the European Space Research Organization.

scholarly journals The development of maritime satellite communications since 1976

2019 ◽  
Vol 31 (1) ◽  
pp. 145-156
Author(s):  
Dimov Stojce Ilcev
Keyword(s):  
United Nations ◽  
Satellite Communication ◽  
Satellite Communications ◽  
Search And Rescue ◽  
Radio Propagation ◽  
Earth Orbit ◽  
The Us ◽  
Military Applications ◽  
Mobile Satellite ◽  
Mobile Satellite Communication

This research note runs on from the note published by the author in this issue of IJMH. It describes the development of Maritime Satellite Communications (MSC) systems for all type of commercial and military seagoing and inland sailing vessels since the 1970s. The main functions of MSC systems are to enhance the safety and security of seagoing vessels, mainly by alerting and Search and Rescue (SAR) operations, and to improve communication facilities between ships and shore infrastructures. The first MSC Geostationary Earth Orbit (GEO) system for military applications was developed in 1976 by the US and other partners, which soon became available for merchant ships. The next step was the development of an independent and international MSC system. To overcome the disadvantages associated with HF/VHF radio propagation and frequency congestions, the International Maritime Organization (IMO) in 1979 encouraged all member nations to establish Maritime Mobile Satellite Communication (MMSC) systems. At the behest of IMO and United Nations (UN) Maritime Body, and pursuant to the Convention on the International Maritime Satellite Organization, signed by 28 countries in 1976, the International Maritime Satellite (INMARSAT) Organization was founded.

scholarly journals Dynamic Radio Links Selection for Mobile Satellite Communication Systems

2019 ◽  
Vol 5 (4) ◽  
pp. 28-36 ◽  
Author(s):  
S. Dvornikov ◽  
S. Yakushenko ◽  
D. Lyanguzov
Keyword(s):  
Communication Systems ◽  
Satellite Communication ◽  
Satellite Communications ◽  
Radio Lines ◽  
Practical Application ◽  
Dynamic Identification ◽  
Communications Systems ◽  
Selection For ◽  
Mobile Satellite ◽  
Mobile Satellite Communication

In this paper presents suggestions for the noise immunity improval of mobile satellite communications lines in difficult physical and geographical conditions through the use of automatic dynamic identification algorithms for the suitability of radio lines and the dynamic antenna orientation devices of mobile satellite communications systems. Based on the results obtained, recommendations for practical application are formulated.

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