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:
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/
Click here for a sample chapter for this book: 0201695820.pdf
I. OVERVIEW.1. History of Communication Satellites.
Background. Arthur C Clarke's Vision. The Early Days of Satellite Communications. SYNCOM. The Early Commercial Geostationary Earth Orbit Satellites: INTELSAT I and II. The Evolution of Communication Satellites. The Hughes Direct Broadcast Satellites. Frequency Bands. Summary.2. Regulatory Framework.
The 1977 World Administrative Radio Council and 1983 Regional Administrative Radio Council. Federal Communications Commission Licensing. Recovery and Reallocation of Spectrum.3. An Overview of the DBS Communication System.
Overview. Multiple Access and Multiplexing. Transponder Power and Configuration. The Throughput. Overall Throughput. More Services per Orbital Slot. Link Analysis. Degradation Because of Rain. Energy Dispersal.
II. THE KEY SUBSYSTEMS AND DESIGN DECISIONS.4. Key Elements of the Radio Frequency Subsystem.
Introduction. The Shaped Reflector Antenna. Modulation and Demodulation. The Low-Noise Block. Traveling Wave Tube Amplifier.5. Forward Error Correction.
What Is Error Correction? Types of Codes. Block Codes: Cyclic Codes. Reed-Solomon Codes. Interleaver. Convolutional Codes/Viterbi Decoding. Performance.6. Conditional Access.
Objectives of a CA System for DBS. Types of Attackers. Some Encryption Preliminaries. Mathematical Preliminaries. Cryptographic Algorithms. Generic CA System.
III. MPEG INTERNATIONAL STANDARDS.7. MPEG 2 Systems.
The Role of MPEG Systems. Transport Stream. Individual Stream Operations (PES Packet Layer). Program Specific Information. Adaptation Field.8. MPEG 2 Video Compression.
The Need for Video Compression. Profiles and Levels. Digital Video Primer. Structure of MPEG 2 Coded Video. Detailed MPEG 2 Coding of Pictures. The Video Decoding Process. Prediction Modes.9. MPEG 1 Audio Compression.
MPEG Audio Compression Overview. Description of the Coded Audio Bitstream. Detailed Encoder. The Audio Decoding Process.
IV. GROUND SUBSYSTEMS.10. DBS Uplink Facilities.
Existing Uplink Facilities. Constituents of an Uplink Facility. Key Uplink Subsystems. Statistical Multiplexing.11. Integrated Receiver Decoder.
IRD Components. The IRD Architecture. Electronic Program Guide. Menu Selections. Multiple TV Sets.
V. THE FUTURE.12. Spaceway and the Global Broadcast Service.
Spaceway Overview. Global Spaceway. The Global Broadcast Service.13. Intelligent Compression: MPEG 4.
Raster and Waveform Emulation versus Symbolic Compression. MPEG 4: The First Steps Toward Symbolic Compression. MPEG 4 Overview. Technical Description of the MPEG 4 Standard. Conclusion. Appendices.A. Performance Degradation Because of Rain.
This book, intended for electronics and communications engineers, describes how all of the individual developments of today's Direct Broadcast Satellites (DBS) came together to provide an overall communication system capable of delivering more than 200 audio-video services.
The state-of-the-art in communications technology is changing so rapidly that it is difficult for anyone associated with electronic communications to remain current. The developments in compression, in particular, are proceeding at a pace that exceeds even the staggering rate of Moore's law, which predicts the increasing capabilities of semiconductors that underlie almost all current technologies.
This book starts with a specific communication system, Direct Broadcast Satellite services, and then shows how the MPEG-1 and MPEG-2 standards were used to implement this system. Thus, the book provides the reader with not just an MPEG or communications satellite discussion, but a complete discussion of how the MPEG standards are used to implement a modern satellite broadcast system.Organization of the Book
The book is divided into the following five parts:
This book is intended for a diverse group of readers, ranging from those who want to obtain a general overview of Direct Broadcast Satellite to those who want to delve deeply into one or all of the technical facets of DBS systems. To accommodate this diversity, sections within the book are annotated by an icon system:
Certain reference materials, which make the book more self-contained for communications engineers, are included in the appendices. Technical decisions made by DIRECTV(TM) and the international Digital Video Broadcast standard are used as case studies throughout the book.