Digital Transmission Systems
In the development of telecommunication networks throughout the world, digital transmission has now replaced analog transmission as the predominant choice for new transmission facilities. This trend began in the early 1960s when the American Telephone and
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Digital Transmission Systems
Chief, Transmission System Development Division Defense Communications Engineering Center Associate Professorial Lecturer Department of Electrical Engineering and Computer Science George Washington University
LIFETIME LEARNING PUBLIC ATIONS
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SPRINGER SCIENCE+BUSINESS MEDIA, LLC
Production Management: Bernie Scheier & Associates Designer: Rick Chafiar Copy Editor: Don Yoder Illustrator: John Foster Compositor: Science Typographers, Inc. © 1985 by Springer Science+Business Media New York
Originally published by Wadsworth, Inc. in 1985 Softcover reprint of the hardcover 1st edition 1985 All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transcribed, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher.
1 2 3 4 5 6 7 8 9 10--88 87 86 85 Library of Congress Cataloging in Publication Data Smith, David R. (David Russell), 1945Digital transmission systems. Includes index. 1. Digital communications. I. Title. TK5103.7.S65 1985 621.38 84-27049 ISBN 978-1-4757-1187-5 ISBN 978-1-4757-1185-1 (eBook) DOI 10.1007/978-1-4757-1185-1
To my wife, Carolyn, and our children Christy, Stacy, Allison, and Andrew.
Preface
In the development of telecommunication networks throughout the world, digital transmission has now replaced analog transmission as the predominant choice for new transmission facilities. This trend began in the early 1960s when the American Telephone and Telegraph Company first introduced pulse code modulation as a means of increasing capacity in their cable plant. Since that time, digital transmission applications have grown dramatically, notably in the United States, Canada, Japan, and Western Europe. With the rapidity of digital transmission developments and implementation, however, there has been a surprising lack of textbooks written on the subject. This book grew out of my work, research, and teaching in digital transmission systems. My objective is to provide an overview of the subject. To accomplish this end, theory has been blended with practice in order to illustrate how one applies theoretical principles to actual design and implementation. The book has abundant design examples and references to actual systems. These examples have been drawn from common carriers, manufacturers, and my own experience. Considerable effort has been made to include up-to-date standards, such as those published by the CCITT and CCIR, and to interpret their recommendations in the context of present-day digital transmission systems. The intended audience of this book includes engineers involved in development and design, system operators involved in testing, operations, and maintenance, managers involved in system engineering and system planning, and instructors of digital communications courses. For engineers, managers, and operators, the book should prove to be a valuable reference
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PREFACE
because of its practical approach and the insight it p
