un mundo vigilado

Fundamentals of Digital Television Transmission. Gerald W. Collins, PE
Copyright  2001 John Wiley & Sons, Inc.
ISBNs: 0-471-39199-9 (Hardback); 0-471-21376-4 (Electronic)

FUNDAMENTALS OF
DIGITAL TELEVISION
TRANSMISSION

FUNDAMENTALS OF
DIGITAL TELEVISION
TRANSMISSION

GERALD W. COLLINS, PE
GW Collins Consulting

A Wiley-Interscience Publication
JOHN WILEY & SONS, INC.
New Yorkž

Chichester

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Weinheim

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ISBN 0-471-21376-4
This title is also available in print as ISBN 0-471-39199-9.
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To God
who created the electromagnetic force
and
the law that governs its operation in communications systems
and
To my beautiful wife Wilma
who, after 39 years of marriage,
still wonders why I’m thinking about my work!

CONTENTS

Preface
Acknowledgments
1 Digital Television Transmission Standards

xi
xiii
1

ATSC terrestrialtransmission standard, vestigial sideband modulation,
DVB-T transmission standard, ISDB-T transmission standard, channel
allocations, antenna height and power, MPEG-2
2 Performance Objectives for Digital Television

21

System noise, external noise sources, transmission errors, error vector
magnitude, eye pattern, interference, cochannel interference, adjacent
channel interference, analog todigital TV, transmitter requirements
3 Channel Coding and Modulation for Digital Television

43

Data synchronization, randomization/scrambling, forward error
correction, interleaving, inner code, frame sync insertion, quadrature
modulation, 8 VSB, bandwidth, error rate, COFDM, flexibility,
bandwidth

vii

viii

CONTENTS

4 Transmitters for Digital Television

67

Precorrection andequalization, up conversion, precise frequency
control, RF amplifiers, solid-state transmitters, RF amplifier modules,
power supplies, power combiners, Wilkinson combiner, ring
combiner, starpoint combiner, cooling, automatic gain or level control,
ac distribution, transmitter control, tube transmitters, tube or
solid-state transmitters, performance quality, retrofit of analog
transmitters forDTV
5 Radio-Frequency Systems for Digital Television

98

Constant-impedance filter, output filters, elliptic function filters,
cavities, channel combiners
6 Transmission Line for Digital Television

117

Fundamental parameters, efficiency, effect of VSWR, system AERP,
rigid coaxial transmission lines, dissipation, attenuation, and power
handling, higher-order modes, peak power rating,...