PREFACE viiAcademy), William Trench (Drexel University), and Carroll 0. Wilde (Naval
Postgraduate School) for their helpful reviews and suggestions. We would like to
express our gratitude to all the people whose efforts contributed to the second
edition of the book. Our colleagues Vuryl Klassen, Gerald Marley, and Harris
Scholtz (all at California State University-Fullerton), Ario Davis (Indiana Uni-
versity of Pennsylvania), R.E. Williamson (Dartmouth College), Calvin Wilcox
(University of Utah), Robert D. Brown (University of Kansas), Geoffrey Prince
(United States Naval Academy), and Elgin H. Johnston (Iowa State University).
For the third edition we thank our colleague C. Ray Rosentrater (Westmont
College) for class testing the material and for making many valuable sugges-
tions. In addition, we thank T.E. Duncan (University of Kansas), Stuart Gold-
enberg (California Polytechnic State University-San Luis Obispo), Michael Stob
(Calvin College), and Vencil Skarda (Brigham Young University) for reviewing
the manuscript.
To C. Ray Rosentrater (Westmont College), we also give thanks and kudos
for his faithful and consistent comments while the fourth edition of the text
was being prepared. We also wish to thank the students of Westmont College
and the University of Maryland for their many frank and helpful suggestions.
Special thanks go to Alison Setyadi for her superb questions and comments over
the fourth edition of this book, and to those students, too numerous to mention
individually, who have e-mailed us with comments and encouragement.
For this fifth edition we are indebted to several colleagues. Patti Hunter
(Westmont College) gave valuable suggestions in helping us nuance the histor-
ical material in Chapter 1. Robert A. Calabretta (Boeing Corporation, and an
expert in signal processing) suggested the inclusion of z-transforms and helped
with some of the key ideas in Chapter 9. Finally, many talented people gave
valuable time in reviewing the manuscript: Murray Eisenberg (University of Mas-
sachusetts), William Yslas Velez (University of Arizona), Paul Martin (Colorado
School of Mines), Al Hibbard (Central College), Christine Black (Seattle Uni-
versity), and Martin Bazant (MIT). Needless to say, we are grateful to all these
good folks for helping to make this text better.
In production matters we thank the people at Jones and Bartlett, the best
in the business: Tim Anderson (Acquisitions Editor), Amy Rose (Production Di-
rector), Tracey Chapman (Production Editor), and Kate Koch (Editorial Assis-
tant). They all consistently went the extra mile in helping to ensure the creation
of a textbook of the highest possible quality. Jenny Bagdigian, our copyeditor,
was very thorough and made many valuable suggestions. Finally, we thank Mike
and Sigrid Wile, who meticulously typeset this edition into Tu\TEX. Their careful
work gave us great comfort in the final stages of this edition.
We acknowledge the use of computer software for symbolic computations
and drawing graphs: F(Z)™, .MATLAB®, Maple™people at Art Matrix for the
color plate pictures connected with Chapter 4.