Results 331 to 340 of about 1,429,207 (385)

Outage Performance of Uplink NOMA in Land Mobile Satellite Communications

IEEE Wireless Communications Letters, 2020
Non-orthogonal multiple access (NOMA) can be efficiently used in land mobile satellite (LMS) communications in order to increase link availability, coverage and reliability.
Sotiris A. Tegos, Panagiotis D. Diamantoulakis, Junjuan Xia, Lisheng Fan, G. Karagiannidis   +4 more
semanticscholar   +1 more source

Compact Dual-Polarized Corrugated Horn Antenna for Satellite Communications

IEEE Transactions on Antennas and Propagation, 2020
In this article, a structure and design procedure of a novel compact dual-polarized corrugated horn antenna with high gain and a stable phase center for satellite communication is presented. The antenna incorporates an ortho-mode transducer (OMT), a mode
S. Manshari, S. Koziel, Leifur Þ. Leifsson   +2 more
semanticscholar   +1 more source

Iterative Doppler Frequency Offset Estimation in Satellite High-Mobility Communications

IEEE Journal on Selected Areas in Communications, 2020
Satellite communication systems are able to provide diverse services for ground terminals in ubiquitous global coverage, which play a vital role in high-mobility communication environments.
Jiawei Wang, Chunxiao Jiang, Linling Kuang, Bofu Yang   +3 more
semanticscholar   +1 more source

Satellite Communication Systems

2004
Satellite-based communication has become a major facet of the telecommunication industry for two major reasons. First, it provides a means of broadcasting information to a large number of people simultaneously. Thus, satellite communication systems are an important ingredient in the implementation of a global communication infrastructure.
openaire   +2 more sources

Lunar communication satellites

Communications Satellite Systems Conference, 1966
Abstract Exploration of the surface of the moon and successful operation of lunar bases in the 1970's and beyond will depend on reliable, long-range communication over the lunar globe as well as between the earth and moon. A system of communication satellites in lunar orbit can provide the communications needed over the moon's surface.
openaire   +2 more sources

The Communication Satellite

1958
The Communication Satellite. The interrelations between an artificial satellite and the earth and the characteristics of satellites are reviewed to determine their effect on communication systems. The requirements for typical communication systems are studied. A set of services are proposed for integration into a large communication satellite.
openaire   +2 more sources

A Satellite Communications Controller

IBM Systems Journal, 1983
A satellite communications controller, which is a component of satellite earth stations, establishes a time division multiple access structure that provides flexibility and efficiency in the use of satellite transmission capacity. The controller blends digital, computer, and communications technology to establish precise timings required for system ...
B. D. Gobioff, J. W. Fennel
openaire   +2 more sources

Multimedia satellite communications

Seamless Interconnection for Universal Services. Global Telecommunications Conference. GLOBECOM'99. (Cat. No.99CH37042), 2003
Satellites are expected to carry a significant amount of future broadband multimedia communications. Satellites are able to offer global connectivity, coverage, rapid deployment and virtually a 'fiber-in-the-sky'. There are numerous exciting challenges and possibilities, and this paper focuses on some of the issues involved.
H. Skinnemoen, R. Rusch
openaire   +2 more sources

Active arrays for satellite communications

2012 Loughborough Antennas & Propagation Conference (LAPC), 2012
This presentation deals with the optimal synthesis of non periodic, isophoric arrays capable of generating high gain spot beams for satellite communications. After discussing the advantages and potentialities of such a kind of antennas, as well as the difficulty of their optimal design, a three step synthesis strategy and the algorithms for its ...
openaire   +3 more sources

History of Satellite Communications

2013
The history of satellite communications is a rich one that began centuries ago with the efforts to interpret the meaning of the “wandering planets” among the stars and to understand the structure of the cosmos. Early scientists such as Sir Isaac Newton and writers of speculative fiction both contemplated the idea that humans might one day launch ...
openaire   +2 more sources