Chapter: Digital Signal Processing - Signals and System

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Signals and System - Introduction

A SIGNAL is defined as any physical quantity that changes with time, distance, speed, position, pressure, temperature or some other quantity.

SIGNALS AND SYSTEM

 

INTRODUCTION

 

A SIGNAL is defined as any physical quantity that changes with time, distance, speed, position, pressure, temperature or some other quantity. A SIGNAL is physical quantity that consists of many sinusoidal of different amplitudes and frequencies.

Ex 

x(t) = 10t

X(t) = 5x2+20xy+30y

 

A System is a physical device that performs an operations or processing on a signal. Ex Filter or Amplifier.

 

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