DSＰ导论.pdf

嵌入式硬件设计参考系列之DSＰ导论.pdf
INTRODUCTION




SECTION 1

INTRODUCTION




1.a
INTRODUCTION




1.b
 INTRODUCTION


SECTION 1

INTRODUCTION
Walt Kester

ORIGINS OF REAL-WORLD SIGNALS AND THEIR UNITS
OF MEASUREMENT
In this book, we will primarily be dealing with the processing of real-world signals
using both analog and digital techniques. Before starting, however, let's look at a
few key concepts and definitions required to lay the groundwork for things to come.

Webster's New Collegiate Dictionary defines a signal as "A detectable (or
measurable) physical quantity or impulse (as voltage, current, or magnetic field
strength) by which messages or information can be transmitted." Key to this
definition are the wo