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Digital Communication Systems

Reference subjects of digital information in English and fully understandable. This book was written to be a textbook for seniors or first - year graduate students interested in electrical communication systems. The book departs from the usual formata in two major respects. First, the text does not cover analog or pulse modulation systems. | y DIGITAL COMMUNICATION SYSTEMS PEYTON Z. PEEBLES JR. Ph.D PROFESSOR OF ELECTRICAL ENGINEERING THE UNIVERSITY OF FLORIDA 8 gh . 60if H 22VQJ 5 L. D. . LZV Siy. Bibltûiecû. Prentice Hall International Inc. This edition may be sold only in those countries to which it is consigned by Prentice-Hall International. It is not to be re-exported and it is not for sale in the U.S.A. Mexico or Canada. 1987 by Prentice-Hall Inc. A Division of Simon Schuster Englewood Cliffs New Jersey 07632 All rights reserved. No part cf this book may be reproduced in any form or by any means without permission in writing from the publisher. Printed in the United States cf America 10 98765432 ISBN 0-13-211 1b2-S 025 Prentice-Hall International UK Limited London Prentice-Hall of Australia Pty. Limited Sydney Prentice-Hall Canada Inc. Toronto Prentice-Hall Hispanoamericana S.A. Mexico Prentice-Hall of India Private Limited New Delhi Prentice-Hall of Japan Inc. Tokyo Prentice-Hall of Southeast Asia Pte. Ltd. Singapore Editora Prentice-Hall do Brasil Ltda. Rio de Janeiro Prentice-Hall Inc. Englewood Cliffs New Jersey To my wife Barbara and sons Peyton III and Edward Contents PREFACE xv Chapter 1 Introduction 1 1.1 SOME HISTORY 1 1.2 SOME DEFINITIONS 4 Analog Sources and Signals 4 Digital Sources and Signals 5 Signal Classifications 5 Carrier Modulation 5 1.3 DIGITAL SYSTEM BLOCK DIAGRAM AND BOOK SURVEY 6 Transmitting Station 6 Channel 8 Receiving Station 8 1.4 SIMPLE BASEBAND SYSTEM FOR REFERENCE 9 REFERENCES 10 Chapter 2 Sampling Principles 11 2.0 INTRODUCTION 11 2.1 SAMPLING THEOREMS FOR LOWPASS NONRANDOM SIGNALS 12 Time Domain Sampling Theorem 12 A Network View of Sampling Theorem 15 Aliasing 17 Frequency-Domain Sampling Theorem 18