This book provides a practical guide to satellite transmission engineering. Although there are a
number of textbooks in the field, this book has two distinguishing features: (1) the focus is more
on practical results and less on the actual derivation of the mathematical equations, and (2) usage
of satellite transmission in an IPv6 environment is highlighted. This is the first book on the market
to address the issue of satellite communications in IPv6 networks. Key aspects to consider include
transmission theory, impairments, antennas’ geometry/size, and reception techniques. Modulation
is fundamental to any transmission system and high symbol-rate digital modulation in satellite
transmission is now the norm. Multiplexing is also an important capability in any modern communication
system. Multiplexing can take place at the physical layer, at the data-link layer, and
at the packet layer. Many variables control the quality, bandwidth, and reliability of the received
signal, such as transmit power, antenna/Low Noise Amplifier gain, antenna size, fade phenomena,
and Forward Error Correction techniques, among others. A Link Budget Analysis determines the
kind of tradeoffs that can be made to achieve engineering objectives. IPv6 is increasingly being
deployed around the world. Because of intrinsic latency in satellite transmission, special considerations
have to be taken into account for TCP traffic, in order to optimize throughput. As a corollary
of multiplexing techniques, Very Small Aperture Terminals make use of statistical in-channel
multiplexing to support a relatively large base of medium-throughput users, especially for data
applications. All of these topics are discussed at a pragmatic level in this text.
There is now a global interest by (all) the telcos in Europe, Asia, and North America to enter
the Internet Protocol TV (IPTV) distribution, and Digital Video Broadcast–Handheld (DVB-H),
or OMA BCAST mobile video markets in order to replace revenues that have eroded to cable TV
companies and wireless providers. Nearly all the traditional telcos worldwide are looking into
these technologies at this juncture. Telcos need to compete with cable companies and IPTV, and
DVB-H is the way to do it. In fact, even the cable TV companies themselves are looking into
upgrading their ATM technology to IP. While these services are now starting out by using IPv4,
IPv6 is just around the corner. Finally, government agencies looking to deploy IPv6 and also use
satellite communication can benefit from this text.
After the Introduction, Chapter 2 covers electromagnetic propagation. Chapter 3 discusses
basic antenna theory. Modulation and multiplexing techniques are discussed in Chapter 4.
Chapter 5 covers Forward Error Correction. The critical topic of Link Budget Analysis is discussed
in Chapter 6. IPv6 is discussed in Chapter 7. TCP/IPv6 issues are covered in Chapter 8.
Considerations related to IPv6 support in satellite environments are surveyed in Chapter 9 and in