Essential Guide to Digital Signal Processing, The

Prentice Hall
Richard G. Lyons / D. Lee Fugal  
Total pages
May 2014
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Using everyday examples and simple diagrams, two leading DSP consultants and instructors completely demystify signal processing with this text. Students will discover what digital signals are, how they’re generated, and how they’re changing life. Students will learn all they need to know about digital signal collection, filtering, analysis, and more, and how DSP works in today’s most exciting devices and applications.


  • Plain-English explanations of digital signal collection, filtering, analysis, and modern applications
  • Includes a complete glossary demystifying signal processing jargon and acronyms
  • By Richard Lyons, internationally-renowned author of Prentice Hall's best-selling Understanding Digital Signal Processing, Third Edition
  • An indispensable resource for all marketers, technical writers, PR specialists, and non-technical managers and investors concerned with DSP technology and products

Table of Contents

Preface        xi

Chapter 1: What Is Digital Signal Processing?         1

The Phantom Technology   1

What Is a Signal?   2

Analog and Digital Signals   3

Digital Signal Processing   3

What You Should Remember   5


Chapter 2: Analog Signals        7

What Is an Analog Signal?   7

A Temperature Analog Signal   7

An Audio Analog Signal   8

An Electrical Analog Signal   10

A Human Speech Analog Signal   21

What You Should Remember   22


Chapter 3: Frequency and the Spectra of Analog Signals         25

Frequency   25

The Concept of Spectrum   29

Analog Signal Spectra   30

What You Should Remember   42


Chapter 4: Digital Signals and How They Are Generated         43

What Is a Digital Signal?   43

How Digital Signals Are Generated   48

The Sample Rate of a Digital Signal   52

A Speech Digital Signal   53

An Example of Digital Signal Processing   55

Another Example of Digital Signal Processing   57

Two Important Aspects of Sampling Analog Signals   61

Sample Rate Conversion   63

What You Should Remember   66


Chapter 5: Sampling and the Spectra of Digital Signals         67

Analog Signal Spectra–A Quick Review   67

How Sampling Affects the Spectra of Digital Signals   71

The Spectrum of a Digital Sine Wave Signal   82

The Spectrum of a Digital Voice Signal   85

The Spectrum of a Digital Music Signal 86

Anti-Aliasing Filters   89

Analog-to-Digital Converter Output Numbers   93

What You Should Remember   94


Chapter 6: How We Compute Digital Signal Spectra         95

Computing Digital Spectra   95

A Spectral Computation Example   97

A Spectral Analysis Example   103

What You Should Remember   106


Chapter 7: Wavelets         107

The Fast Fourier Transform (FFT)–A Quick Review   107

The Continuous Wavelet Transform (CWT)   109

What You Should Remember   117


Chapter 8: Digital Filters         119

Analog Filtering   119

Generic Filter Types   121

Digital Filtering   122

What You Should Remember   126


Chapter 9: Binary Numbers         127

Number Systems   128

Binary Data   133

Why Use Binary Numbers?   134

Binary Numbers and Analog-to-Digital Converters   136

What You Should Remember   139


Appendix A: Scientific Notation         141


Appendix B: Decibels         145

Decibels Used to Describe Sound Power Values   146

Decibels Used to Measure Earthquakes   147

Decibels Used to Describe Signal Amplitudes   149

Decibels Used to Describe Filters   153


Appendix C: AM and FM Radio Signals         155

AM Radio Signals   155

FM Radio Signals   157

Comparing AM and FM Radio   159


Appendix D: Binary Number Formats         161

Unsigned Binary Number Format   161

Sign-Magnitude Binary Number Format   162

Two’s Complement Binary Number Format   163

Offset Binary Number Format   165

Alternate Binary Number Notation   166


Glossary         169


Index         185


Richard G. Lyons, consulting systems engineer and lecturer with Besser Associates, received the IEEE Signal Processing Society’s 2012 Educator of the Year Award and has taught DSP at the University of California, Santa Cruz Extension. Former associate editor for IEEE Signal Processing magazine, he created and edited its “DSP Tips and Tricks” column. His books include Understanding Digital Signal Processing, Third Edition (Prentice Hall, 2011).


D. Lee Fugal is president of S&ST Technical Consulting, chairman of the San Diego IEEE Signal Processing Society, and author of Conceptual Wavelets in Digital Signal Processing (Space & Signals Technical Publishing, 2009). Drawing on more than thirty years of industry experience, he teaches upper-division university courses in DSP and offers ATI short courses for working engineers throughout the United States. An IEEE Senior Member, he is a recipient of the IEEE’s Third Millennium Medal.