Chapter 1: Overview of Signals and Systems

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Chapter 1 Overview of Signals and Systems
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Signals

• Can be measured
• Voltages
• Currents
• Tempertures
• Pressures
• Images
• etc

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Systems

• Hardware that processes signals
• Control
• Car with cruise control system
• Signal Processing
• CD, CD player, etc
• Communications
• Radio waves, superheterodyne receiver, speakers,
  etc

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Ch. 2 Continuous-time Signals

• A signal is a function of an independent variable
  such as
• Time
• Location
• Angle
• Signals can be measured
• Definition vs description vs property

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Function Algebra

• Sum of functions
• Product of functions
• Quotient of functions
• Difference of functions
• Point-by-point operation
• Composition of functions (functions of functions)

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Basic C-T signals

• Unit step function
• Unit Impulse function
• Product with unit impulse function (sifting
  property equivalence property)
• Relationship to unit step
• Use in integrals

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Basic C-T signals

• Exponential signals
• Sinusoidal signals
• Angular measurments,