Moreover, the material has been effectively taught over the years while I was
an instructor for Besser Associates, and adjunct for Polytechnic University of New York. I have had
tremendous feedback during these sessions, which have improved the content and delivery of this book.
I cannot conclude without offering my appreciation to my editor Steve Chapman of McGraw-Hill
and to Gita Raman, project manager at ITC, for providing corrections, suggestions, and a continued
sense of urgency to keep this book on schedule.
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SIGNAL PROCESSING
FOR WIRELESS
COMMUNICATIONS
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CHAPTER 1
WIRELESS TOPICS
1.1 INTRODUCTION
Wireless communications has enabled a variety of services starting from Voice continuing to Data and
now to Multimedia. We are about to enter an era that has never been seen before as cell phones, laptops,
cameras, personal digital assistants (PDAs), and televisions all converge into a potentially single
consumer electronic device.
Since the conception of cellular communications, we have learned to enjoy the freedom that comes
with mobility. The first generation cellular system was AMPS, Analog Mobile Phone System. It used the
traditional frequency modulation (FM) scheme to enable communication among voice users.
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