Richard G. Lyons - The Essential Guide to Digital Signal Processing

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Richard G. Lyons
D. Lee Fugal

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Library of Congress Cataloging-in-Publication Data
Lyons, Richard G., 1948
The essential guide to digital signal processing/Richard G. Lyons, D. Lee Fugal.
pages cm
Includes index.
ISBN-13: 978-0-13-380442-3 (alk. paper)
ISBN-10: 0-13-380442-9 (alk. paper)
1. Signal processing--Digital techniques. I. Fugal, D. Lee. II. Title.
TK5102.9.L958 2014
621.38522dc23 2014006918

Copyright 2014 Pearson Education, Inc.

All rights reserved. Printed in the United States of America. This publication is protected by copyright, and permission must be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. To obtain permission to use material from this work, please submit a written request to Pearson Education, Inc., Permissions Department, One Lake Street, Upper Saddle River, New Jersey 07458, or you may fax your request to (201) 236-3290.

ISBN-13: 978-0-13-380442-3
ISBN-10: 0-13-380442-9
Text printed in the United States on recycled paper at RR Donnelley in Crawfordsville, Indiana.
First printing, May 2014

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Bernard Goodwin

Managing Editor
John Fuller

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Proofreader
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Cover Designer
Chuti Prasertsith

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Shepherd, Inc.

Were all familiar with the word signal as something that conveys information such as traffic signals, distress signals, or even smoke signals. In certain card games, we even try not to signal when weve been dealt a good hand. But what does it mean to process a signal? This book is written to answer that question for you as clearly and simply as possible, using real-world examples of signals and signal processing with which you are already familiar.

Although we dont often realize it, our daily lives are routinely influenced by signals and signal processing. This book not only shows why this is so, but goes further, to explain, for example, why the audio from an FM radio sounds so much better than the audio you hear from your cell phone.

This book is intended for nontechnical people rather than engineering students. As such, the book has two main objectives: to describe the fundamental concepts of signals and signal processing in an understandable way with a minimum of mathematics, and to introduce the reader to the languagethe lingoof signal processing. (To aid the reader, a comprehensive glossary of signal processing terminology and acronyms is included at the end of the book.)

In particular, for those nontechnical readers who are involved with companies that produce or use signal processing hardware or software, you have our utmost sympathy. You are exposed to a vast array of mysterious concepts and terminology. This book will remove that mystery so you can further understand signal processing and more effectively communicate with engineers and other technical people.

As it turns out, the topic of signals can be divided into two main categories: analog signals and digital signals. This book slowly and gently explains the nature of both types of signals and how they are used to improve the quality of our lives.

Weve written this book in what we think is a sensible progression of chapters, but its not necessary to read the chapters in order, or even to read all of them. describe the nature of analog and digital signals, while the other chapters cover the topics of the processing operations performed on analog and digital signals.

Having said all of that, please know your authors and publisher are on your side. We hope you enjoy this book and find it useful!

The Phantom Technology

The technology of digital signal processing (DSP) has affected our modern lives in the most significant ways. If you watch television, connect to the Internet, use a digital camera, make a cell phone call, drive a car, type on the keyboard of a home computer, or use a charge or debit card, you are taking advantage of DSP. In fact, DSP is the technical brains in all those devices. Although we take advantage of DSP dozens of times a day, very few people have ever heard of digital signal processing and this strange situation is why DSP has been called a phantom technology. To show how much we depend on this invisible DSP technology, provides a short list of what life would be like without DSP.