Compatibility Analysis of ARABSAT 2A at 30.5 0 Case Study

Broadcasting, IEEE …, 2006

2014

Satellite communication is one of the most impressive spin-offs from the space programs and has made a major contribution to the pattern of international communication. A communication satellite is basically an electronic communication package placed in orbit whose prime objective is to initiate or assist another through space. This paper will explain overview of satellite communications, its working, types of satellites and services provided by these communications. This communication further includes satellite orbits and their comparison. We had also discussed satellite merits and demerits which made this communication successful along with its applications in today world (usage). New invention satellites are also discussed.

1999

The use of registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant laws and regulations and therefore free for general use. The publisher makes no representation, express or implied, with regard to the accuracy of the information contained in this book and cannot accept any legal responsibility or liability for any errors or omissions that may be made.

IEEE Communications Magazine, 1999

Satellite and Space Communications (SSC) Committee has provided a forum for technical interchange T" among those working in this field for nearly 40 years. It began in the early 1960s soon after it was recognized that the rocket capabilities demonstrated by the Soviet Union and United States in the late 1950s could readily be used to launch communications satellites. From that time, the development and impact of satellite communications has been revolutionary. In the early days, the major activity was associated with business, political and technical issues associated with the development and introduction of the first communications satellites. The technical community was occupied with the tradeoff studies associated with satellite orbits, frequency bands, and link design. However, the first communications satellites came along quickly with low earth orbit launches of Telstar and Relay in 1962, the first synchronous orbit satellite, Syncom, in 1963, and the launch of INTELSAT 1 and MOLNIYA 1 in 1965. Since that time, the field of satellite communications has continued to grow rapidly. Satellites have become dramatically larger, capable of increased capacity and employing rapidly developing light weight electronics technology, spacecraft control, and power generation and storage devices. Significant development went into sophisticated space-borne regional and spot-beam dual polarized antennas at both C-and Ku-band to increase payload capacity through frequency reuse techniques. Next, Very Small Aperture Terminal (VSAT) networks and applications, and direct broadcast satellite systems and technologies, were introduced. Quickly, the exploitation of the Ka-band frequencies for future growth became an important topic within the satellite communications community. During the 1970s and 1980s, major engineering efforts were devoted to the development of higher power amplifiers, lighter weight, improved performance microwave filters and circuit switches, and electric power generation and storage devices, which contributed to larger communications satellite payloads that fit the launch constraints of available launch vehicles. Eventually, systems that provide communications services to mobile terminals (e.g., ships, land vehicles, and aircraft) were developed. These systems exploited one of the major attributes of communications satellites, i.e., the capability to offer wireless services over a large service area. Today, communications satellites carry about one-third of voice and essentially all international television traffic. Significant advances in video compression and data protocol enhancement technology have made new and many previously

2011 IFIP Wireless Days (WD), 2011

Keywords-Broadband wireless access (BWA); satellite earth station (ES); interference; path loss I.

2007 International Workshop on Satellite and Space Communications, 2007

A panoramic view on the study and design of digital designed by the DVB-T2 group. Again, the DVB-T2 specifisatellite communication links is the focus of this paper. Starting cations will be OFDM-based and will include state-of-the-art from the characterization of satellite propagation channel in solutions such as MIMO, low density parity check (LDPC) different application environments (from broadcast to fixed terminals, to broadband mobile satellite access), we address scodin scm,prolayrorte rocreinFC physical layer aspects related to satellite communications in the smart and fast synchronization techniques. attempt of providing the Reader with an overview of the new Satellite communications are not immune from this wave trends and open issues in this field. of innovation. In the DVB forum, after the publication of the DVB-S2 standard and the approval of the DVB-SH specifica

The World Academy of Research in Science and Engineering

Communication has revolutionized by the Satellites. Its importance and services to human race cannot be neglected. In general, it helps us to predict weather, storm warning and also provides communication services in many fields like telephone, mobiles, television etc. In satellites Communication between two parties can be done by various modulation techniques. For example: FDMA, TDMA, CDMA. This paper describes the history of satellite communications, its types and its technological trends in different areas especially mobile communications.

IEE Proceedings F Communications, Radar and Signal Processing, 1984

The characteristics of advanced digital transmission systems were measured using newly developed small earth stations and a K-band (30/20 GHz) and C-band (6/4 GHz) communication satellite. Satellite link performance for data, facsimile, video and packet switching information transmission at bit rates ranging from 6.4 kbit/s to 6.3 Mbit/s have been confirmed, using a small K-band (30/20 GHz) earth station and a demandassignment time division multiple access (DA-TDMA) system. A low-capacity omni-use C-band (6/4 GHz) terminal experiment has verified a telephone channel transmission performance by spread-spectrum multiple access (SSMA). Single point to multipoint transmission characteristics of the 64 kbit/s data signals from the computer centre were tested using a receive-only 4 GHz earth terminal. Basic satellite link performance was confirmed under clear-sky conditions; however, evaluation of the satellite link is also described based on rain attenuation and sun-transit interference data. Precise satellite orbit and attitude keeping experiments were carried out to obtain precise satellite antenna pointing accuracy for development of K-band earth stations that do not require satellite tracking equipment. Precise station keeping accuracy of 0.02 degrees was obtained.

IEEE Journal on Selected Areas in Communications, 1985

The potentih interference of spurious. radiation from the local oyillators of direct broadcast satellite (DBS) television receivers to terrestrial 11, GHz microwave qdio services is examined. Typical parameters for DBS receive? are identified and used in a computer simulation to calculate the aggregate effect of a.large number of units distributed about a terrestrjal repeater .site.-e results of the analysis show that for a local oscillator frequency of 11.2 GHz, DBS LO leakage o f ,-70 dBW/unit, and a density of 26oo/km2 (lOOO/mi*) the cumulative interference power would be comparable to the thermal noise level of a terrestrial radio system under .realistic conditions., Methods of scaling the results for other system parameters are also presented.