日新月异的现代信息技术中，通信技术始终位于发展的前列。据统计，通信行业的年均增长率近10年来始终处于两位数的百分比。迅猛发展的技术催生了对通信技术人才的迫切需求，通信工程专业的学生也面临着巨大的挑战。而目前大学的通信工程专业大多局限于传统的电信通信系统，教学大纲主要包括程控交换和短波通信等内容。随着互联网技术的发展和逐步渗透，现代通信系统，特别是第三代移动通信系统，已经逐步从传统的电路交换，发展到以分组交换和IP传输为核心的新的通信系统架构。
在我们多年讲授“通信系统”课程的教学实践中，很难找到能够反映以上这种技术融合的中文教材，更别提双语教学中亟需的英语原文教材。尽管过去几年国内多家出版社引进多本电子通信系统方面的教材，但无论是教材内容的技术先进性还是内容的深度，都不能满足“通信系统”课程的需要。
可喜的是，无意之中在网上发现了Louis E Frenzel Jr所著的这本教材，发现本教材有关通信系统部分的论述是按照微波通信、光纤通信、卫星通信、移动通信、网络通信等内容分章进行的，这一点特别符合国内大多数院校的教学方式。在清华大学出版社的共同努力下，我们对原书的内容进行了改编。原书中包含了通信原理和通信系统两大部分的内容，考虑到国内大多数院校的课程设置，同时也受到篇幅的限制，在改编中删除了原书中有关通信原理的内容（原书第2章至第9章），剩余的章节重新进行了编号。此外，考虑到国内读者的习惯，在每章的大节之后增加了小节的三级编号。在征得原书作者的同意之后，对原书中的部分文字错误也进行了修订。
本人才疏学浅、水平有限，改编中难免存在不当之处，请读者批评指正。
刘家康
于北京理工大学
Preface
This new third edition of Principles of Electronic Communication Systems is fully revised and updated to make it one of the most current textbooks available on wireless, networking, and other communications technologies. Because the .eld of electronic communications changes so fast, it is a never-ending challenge to keep a textbook up to date. While principles do not change, their emphasis and relevance do as technology evolves. Furthermore, students need not only a .rm grounding in the fundamentals but also an essential understanding of the real world components, circuits, equipment, and systems in everyday use. This latest edition attempts to balance the principles with an overview of the latest techniques.
One of the major goals of this latest revision is to increase the emphasis on the system level understanding of wireless, networking, and other communications technologies. Because of the heavy integration of communications circuits today, the engineer and the technician now work more with printed circuit boards, modules, plug-in cards, and equipment rather than component level circuits. As a result, older obsolete circuits have been removed from this text and replaced with more integrated circuits and block diagram level analysis. Modern communications engineers and technicians work with speci.cations and standards and spend their time testing, measuring, installing, and troubleshooting. This edition moves in that direction. Detailed circuit analysis is still included in selected areas where it proves useful in understanding the concepts and issues in current equipment.
In the past, a course in communications was considered an option in many electronic programs. Today, communications is the largest sector of the electronics .eld with the most employees and the largest equipment sales annually. In addition, wireless, networking or other communications technologies are now contained in almost every electronic product. This makes a knowledge and understanding of communication a must rather than an option for every student. Without at least one course in communications, the student may graduate with an incomplete view of the products and systems so common today. This book can provide the background to meet the needs of such a general course.
As the Communications and Networking Editor for Electronic Design Magazine (Penton Media) and editor of the Wireless System Design Update online newsletter, I witness daily the continuous changes in the components, circuits, equipment, systems, and applications of modern communications. As I research the .eld, interview engineers and executives, and attend the many conferences for the articles and columns I write, I have come to see the growing importance of communications in all of our lives. I have tried to bring that perspective to this latest edition where the most recent techniques and technologies are explained. That perspective coupled with the feedback and insight from some of you who teach this subject has resulted in a text that best .ts the 21st century student.
New to this Edition
Here is a chapter-by-chapter summary of revisions and additions to this new edition.
Chapter 1 Signi.cant update of the applications section.
Chapter 2 Revised and updated section on .lters.
Chapters 3–6 General editing and updating of circuits.
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Chapter 7 Previously chapter 8 on Digital Communications Techniques. Exten
sive update of the section on data conversion to include new ADC and
DAC circuits and expanded speci.cations section. DSP section has also
been updated.
Chapter 8 Previously chapter 7 on Radio Transmitters. Expanded coverage of the
I/Q architecture for digital data transmission. Addition of broadband
linear power ampli.ers using feedforward and adaptive predistortion
techniques. Addition of ISM band IC transmitters. The section on vac
uum tube power ampli.ers has been removed but will be available on
line if anyone needs it.
Chapter 9 Expanded coverage of receiver sensitivity and signal to noise ratio, its
importance and calculation. Increased coverage of the software-de.ned
radio (SDR) and introduction to cognitive radio. Updated section on
receiver circuits and transceivers. Description of a typical wireless LAN
transceiver chip.
Chapter 2 Addition of code division multiple access, the Radio Data System and
SCA subsystems in FM radios. Elimination of the older no-longer-used
PAM telemetry system coverage. A new section on time and frequency
division duplexing.
Chapter 3 Expanded coverage of digital modulation and spectral ef.ciency. Addi
tion of an explanation of how different digital modulation schemes
affect the bit error rate (BER) in communications systems. Compar
isons based on BER vs. carrier to noise radio (C/N) are added. Updated
sections on spread spectrum and OFDM. A new section on convolu
tional and turbo coding.
Chapter 4 Previous chapter 12 Computer Networking has been revised into a new
chapter called Introduction to Networking and LANs. The coverage has
been expanded and updated to include things like mesh networking fun
damentals, the latest Ethernet standards including Power over Ethernet
(PoE), and improved explanation of LAN equipment.
Chapter 5 Minor revisions and updates.
Chapter 6 Improved explanation of the near and far .elds. Introduction to the
automatic antenna tuner.
Chapter 7 A new chapter focusing on the Internet, chapter 9 includes the Inter
net material from the previous chapter 12 but with extensive new mate
rial. Detailed explanation of how information travels via the Internet.
Addition of descriptions of Internet core technologies like ATM, Frame
Relay, and Sonet. Considerably expanded discussion of the TCP/IP
protocol. Expanded explanation of routers including line cards and
switch fabrics. Introduction of a new section on storage area networks
(SANs) and their transmission technologies including Fibre Channel
and iSCSI. A new section on Internet security including encryption and
authentication.
Chapter 8 Extensively revised and updated. New material on microwave antennas
including phased arrays, beam forming arrays, adaptive antennas, and
the smaller ceramic and PC board antennas like the loop, meander line,
and inverted-F. The concepts of diversity and multiple input multiple
output (MIMO) are added.
Chapter 9 Revised and updated. New materials include a section on Very Small
Aperture Terminals and expanded coverage of GPS.
Chapter 10 Elimination of the section on paging. Updated section on cordless
phones. New section on voice over Internet protocol (VoIP) digital
telephones.
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Chapter 11 New section on MSA optical transceiver modules, types and speci.cations. Expanded section on electronic dispersion compensation. New section on passive optical networks (PONs) used in .ber to the home (FTTH) broadband systems.
Chapter 12 This is a new chapter on Cell Phone Technologies. It covers all major analog and digital cell phone standards and systems and frequency allocations. GSM, GPRS, and EDGE TDM systems are covered as well as both cdma2000 and WCDMA systems. Typical chips are reviewed. Fourth generation systems are introduced.
Chapter 13 A new chapter on wireless technologies. Coverage includes wireless LAN (802.11a/b/g/n), Bluetooth, ZigBee, Ultra wideband (UWB), WiMAX, RFID, near .eld communications (NFC), ISM band short range radios, and infrared wireless. Coverage of personal area networks and mesh systems is included.
Chapter 14 Communications Tests and Measurement chapter is revised and updated. A new section on the widely used boundary scan and JTAG test system for chips and boards has been added.
Chapter 15 Television has been dropped from the book, but the chapter has been revised and updated, and placed on the Online Learning Center web-site for those who choose to assign it. It now includes new digital television information, new cable standards, and mobile (cell phone video) television standards.
In a large book such as this, it’s dif.cult to give every one what he or she wants. Some want more depth others greater breadth. I tried to strike a balance between the two. As always, I am always eager to hear from those of you who use the book and welcome your suggestions for the next edition.
Learning Features
Principles of Electronic Communication Systems third edition has been completely redesigned to give it a more attractive and accessible page layout. To guide readers and provide an integrated learning approach, each chapter contains the following features:
Chapter Objectives
Key Terms
Pioneers of Electronics articles
Good to Know margin features
Examples with solutions
Chapter Summary
Questions
Problems
Critical Thinking
Student Resources
Laboratory & Activities Manual
A major change with this third edition is the availability of a new laboratory manual. The Lab Manual developed for the second edition will be retained for those of you who use it. This new Laboratory & Activities Manual provides more actual hands-on hardware experiments with modern circuits and components. While many circuits are still explored, the attempt is to push toward more systems-level experiments. Building a practical, affordable but meaningful lab is one of the more dif.cult parts of creating a college course in communications. This new manual provides practice in the principles by
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using the latest components and methods. Affordable and readily available components and equipment have been used to make it easy for professors to put together a communications lab that validates and complements the text.
Many of the exercises in the Laboratory & Activities Manual involve web access and search to build the student's ability to use the vast resources of the Internet and World Wide Web. The practical engineers and technicians of today have become experts at .nding relevant information and answers to their questions and solutions to their problems this way. While practicing this essential skill of any communications engineer or technician knowledge, the student will be able to expand his or her knowledge of any of the subjects in this book, either to dig deeper into the theory and practice or get the latest update information on chips and other products.
Online Learning Center (“OLC”) website, www.mhhe.com/frenzel3e
This text-speci.c site includes a number of student-oriented resources, including:
.
Chapter outlines and summaries.
.
MultiSim version 9 Primer, for those who want to get up and running with this popular simulation software. The section is written to provide communications examples and applications.
.
MultiSim circuit .les for communications electronics.
.
Web Links to industrial and educational sites of interest.
.
Link to the Work-Ready Electronics; these activities, created by the MATEC research center, show the practical skills needed in various areas of interest—including communications—in the context of modern industry.
Instructor Resources
Instructor Productivity Center CD-ROM
This CD includes the following resources for adopters of the text:
.
Answers and solutions to all text problems.
.
Answers and information for the Lab & Activity Manual.
.
Electronic test banks with a mix of questions for each text chapter.
.
PowerPoint presentations for all chapters of the text.
Online Learning Center (“OLC”) website, www.mhhe.com/frenzel3e
The OLC contains student resources, plus the following instructor resources:
.
Answers and solutions to the text problems and lab activities, under password protection.
.
PowerPoint presentations for each chapter online.
.
Additional quiz questions for each chapter, which can be assigned or used for student self-study.
.
Blackboard and WebCT cartridges for use with these popular classroom management systems.
Classroom Performance System (CPS) from eInstruction is available for adopters; its “clicker” system provides a vehicle for in-class quizzing and concept reinforcement, and classroom management.
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Acknowledgements
While producing a new edition of a book does not involve the same effort as writing a new book, this latest revision was a major project. My special thanks to Managing Developmental Editor Jonathan Plant, and Publisher Thomas Casson for their continued support and encouragement to make this happen. It has been a pleasure to work with you both.
And my appreciation also goes out to those professors who reviewed the book and offered your feedback, criticism and suggestions. Thanks for taking the time to provide that valuable input. I have implemented virtually all of your recommendations. I especially appreciate the extensive input from Walt Curry of the United States Naval Academy, most of which I have included. The following reviewers looked over the manuscript in various stages, and provided a wealth of good suggestions for the new edition:
Heng Chan Robert J. Lovelace
Mohawk College (ON) East Mississippi Junior College (MS)
Captain Walter N. Currier Jr. Robert Most
United States Naval Academy (MD) Ferris State University (MI)
William C. Donaldson Tom N. Neal Jr.
Wake Techical College (NC) Grif.n Technical College (GA)
Robbie Edens Phillip C. Purvis
ECPI College of Technology (SC) George C. Wallace Community Terry Fleischman College (AL)
Fox Valley Technical College (WI) Pravin M. Raghuwanshi Richard Fornes DeVry University (NJ)
Johnson College (PA) William Salice
G. J. Gerard ECPI College of Technology (VA) Gateway Community College (CT) Randy Winzer
Georges C. Livanos Pittsburg Sate University (KS) Humber College (ON)
With the latest input from industry and the suggestions from those who use the book, this edition should come closer than ever to being an ideal text for teaching current day communications electronics.
Lou Frenzel Austin, Texas 2006
