Collins - Fundamentals of Digital Television Transmission.pdf

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FUNDAMENTALS OF
DIGITAL TELEVISION
TRANSMISSION
GERALD W. COLLINS, PE
GW Collins Consulting
A Wiley-Interscience Publication
JOHN WILEY & SONS, INC.
New York ž Chichester ž Weinheim ž Brisbane ž Singapore ž Toronto
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Copyright 2001 by John Wiley & Sons, Inc. All rights reserved.
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ISBN 0-471-21376-4
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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
xi
Acknowledgments
xiii
1 Digital Television Transmission Standards
1
ATSC terrestrial transmission 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 to digital 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 and equalization, 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 for DTV
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, frequency response,
standard lengths, corrugated coaxial cables, wind load, waveguide,
bandwidth, waveguide attenuation, power rating, frequency response,
size trade-offs, which line? waveguide or coax? pressurization
7 Transmitting Antennas for Digital Television
150
Antenna patterns, elevation pattern, mechanical stability, null fill,
azimuth pattern, slotted cylinder antennas, gain and directivity, power
handling, antenna impedance, bandwidth and frequency response,
multiple-channel operation, types of digital television broadcast
antennas, antenna mounting
8 Radio-Wave Propagation
199
Free-space propagation, distance to the radio horizon, refraction,
multipath, ground reflections, surface roughness, effect of earth’s
curvature, Fresnel zones, linear distortions, diffraction, fading,
undesired signal, field tests, Charlotte, North Carolina, Chicago,
Illinois, Raleigh, North Carolina

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