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Author: United States. Congress. House. Committee on Government Operations. Subcommittee on Government Information and Individual Rights
Publisher:
ISBN:
Category : Artificial satellites in telecommunication
Languages : en
Pages : 132
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Book Description
Author: United States. Congress. House. Committee on Government Operations. Subcommittee on Government Information and Individual Rights
Publisher:
ISBN:
Category : Artificial satellites in telecommunication
Languages : en
Pages : 132
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Book Description
Author: Donald C. Mead
Publisher: Pearson Education
ISBN:
Category : Computers
Languages : en
Pages : 328
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Book Description
With its higher power and superior video and audio quality, Direct Broadcast Satellite (DBS) communications is proliferating worldwide. Many new DBS systems are evolving and with the introduction of HDTV, DBS technology is predicted to become even more prevalent. Written by a leading DBS authority, this book is required reading for anyone involved in this burgeoning field. This comprehensive reference describes the history and structure of DBS systems, the regulatory environment, the subsystems that support it, and the underlying compression technology that makes it commercially feasible. Direct Broadcast Satellite Communications can be read as a broad overview of DBS systems or can serve as a detailed technical description. In particular, the author thoroughly explains how MPEG compression standards are used to implement modern satellite broadcast systems. You will find complete information on key topics such as: International and FCC regulations Radio frequency components of DBS systems, including the shaped reflector antenna Forward error correction, looking at block codes, interleaving, and Viterbi decoding The use of cryptography for conditional access to subscription services MPEG system and transport layer MPEG-2 video and audio compression Connecting terrestrial systems and DBS uplinks The Integrated Receiver Decoder In addition, the book explores future developments, including the Spaceway and the Global Broadcast Service, as well as the MPEG-4 compression standards. Numerous case studies involving DIRECTV(TM) and the European DVB standard appear throughout the book. For other books in this series, see http://www.awl.com/cseng/wirelessseries/
Author: Sara Fletcher Luther
Publisher: Oxford University Press, USA
ISBN:
Category : History
Languages : en
Pages : 248
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Book Description
The possibilities of Direct Broadcast by Satellite (DBS) have provoked serious debate in modern telecommunications circles, raising vital questions of state sovereignty, cultural interaction, and the functioning of political and economic systems. In this ground-breaking study, Dr. Luther identifies the social, political, and economic factors underlying the evolving international controversy and situates the debate in the larger arena of postwar power relationships, including the rise of socialist and Third World countries. Placing these issues in a unique historical framework, she discusses the rise of international regulation through the International Telecommunications Union (ITU), the role of radio interests in the United States, and the legitimizing effect of the then-emerging mass communications research and scholarship. Dr. Luther also devotes particular attention to the First Amendment and "free flow" arguments put forth by the United States in support of an unfettered international transmission of radio and television signals via satellite. A provocative, insightful work, The United States and the Direct Broadcast Satellite will do much to help clarify the ongoing DBS debate.
Author: Eur Ing
Publisher: Elsevier
ISBN: 1483292088
Category : Technology & Engineering
Languages : en
Pages : 231
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Book Description
Every facet of satellite technology is included in this concise reference guide to a fast developing field. The latest systems are included and the coverage is worldwide. Supplemented with tables, formulae and footprints for satellites, this pocket book is the first place for communications engineers, students, satellite industry personnel and enthusiasts to look for essential data.DBS and other enabling technologies for HDTV are covered, in this wide-ranging review of technologies used in Europe, America, the Middle East and Asia. Drawing on James Wood's extensive experience as an engineer in the international broadcasting industry and a technical broadcast journalist, this book will provide the essential details of satellite communications.
Author: James Wood
Publisher: IET
ISBN: 9780852969205
Category : Business & Economics
Languages : en
Pages : 304
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Book Description
Vol. 1 : The following topics are dealt with: radio instrument; foreign policy; information broadcasting; radio telephony; and wartime broadcasting.
Author: Steven J. Isakowitz
Publisher: AIAA
ISBN: 9781563473531
Category : Reference
Languages : en
Pages : 622
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Book Description
This best-selling reference guide contains the most reliable and up-to-date material on launch programs in Brazil, China, Europe, India, Israel, Japan, Russia, Ukraine, and the United States. Packed with illustrations and figures, the third edition has been extensively updated and expanded, and offers a quick and easy data retrieval source for policymakers, planners, engineers, launch buyers, and students.
Author: United States. Congress. House. Committee on Foreign Affairs
Publisher:
ISBN:
Category : Communication in international relations
Languages : en
Pages : 342
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Book Description
Examines foreign policy implications of international use of radio and TV broadcasting from satellites.
Author: United States. Congress. House. Committee on Foreign Affairs. Subcommittee on National Security Policy and Scientific Developments
Publisher:
ISBN:
Category : Artificial satellites in telecommunication
Languages : en
Pages : 338
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Book Description
Examines foreign policy implications of international use of radio and TV broadcasting from satellites.
Author: Teresa M. Braun
Publisher: John Wiley & Sons
ISBN: 1118345207
Category : Science
Languages : en
Pages : 400
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Book Description
This is the first book primarily about the satellite payload of satellite communications systems. It represents a unique combination of practical systems engineering and communications theory. It tells about the satellites in geostationary and low-earth orbits today, both the so-called bent-pipe payloads and the processing payloads. The on-orbit environment, mitigated by the spacecraft bus, is described. The payload units (e.g. antennas and amplifiers), as well as payload-integration elements (e.g. waveguide and switches) are discussed in regard to how they work, what they do to the signal, their technology, environment sensitivity, and specifications. At a higher level are discussions on the payload as an entity: architecture including redundancy; specifications--what they mean, how they relate to unit specifications, and how to verify; and specification-compliance analysis (“budgets”) with uncertainty. Aspects of probability theory handy for calculating and using uncertainty and variation are presented. The highest-level discussions, on the end-to-end communications system, start with a practical introduction to physical-layer communications theory. Atmospheric effects and interference on the communications link are described. A chapter gives an example of optimizing a multibeam payload via probabilistic analysis. Finally, practical tips on system simulation and emulation are provided. The carrier frequencies treated are 1 GHz and above. Familiarity with Fourier analysis will enhance understanding of some topics. References are provided throughout the book for readers who want to dig deeper. Payload systems engineers, payload proposal writers, satellite-communications systems designers and analysts, and satellite customers will find that the book cuts their learning time. Spacecraft-bus systems engineers, payload unit engineers, and spacecraft operators will gain insight into the overall system. Students in systems engineering, microwave engineering, communications theory, probability theory, and communications simulation and modelling will find examples to supplement theoretical texts.
Author: Hamid Mowlana
Publisher: SAGE
ISBN: 9780761952572
Category : Psychology
Languages : en
Pages : 290
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Book Description
The new edition of this major work offers a comprehensive analysis of international communication systems and the global flow of information. Hamid Mowlana places the analysis of global mass media and other forms of communication within a critical overview of international and intercultural relations. Extensively rewritten and revised, Global Information and World Communication deals with the phenomenon of global information flow in all contexts - political, economic, cultural, technological, legal and professional. Mowlana illustrates how different communication strategies and systems have contributed to the creation of powerful interests and have altered the global scene. He takes into account recent events and sho
