PPT - Introduction to Signal & Systems Electrical Engineering (EE) Notes | EduRev

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SIGNAL AND SYSTEM SIGNAL AND SYSTEM
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SIGNAL AND SYSTEM SIGNAL AND SYSTEM
General Introduction General Introduction
? What are they?
? Signal
? System
Page 3


SIGNAL AND SYSTEM SIGNAL AND SYSTEM
General Introduction General Introduction
? What are they?
? Signal
? System
Fundamentals of Signals and Systems Fundamentals of Signals and Systems
Ø Signal: a function of one or more variables that convey
information on the nature of a physical  phenomenon.
Examples: v(t),i(t),x(t),heartbeat, blood pressure,
temperature, vibration.
 One-dimensional signals: function depends on a single
variable, e.g., speech signal
 Multi-dimensional signals: function depends on two or
more variables, e.g., image
Page 4


SIGNAL AND SYSTEM SIGNAL AND SYSTEM
General Introduction General Introduction
? What are they?
? Signal
? System
Fundamentals of Signals and Systems Fundamentals of Signals and Systems
Ø Signal: a function of one or more variables that convey
information on the nature of a physical  phenomenon.
Examples: v(t),i(t),x(t),heartbeat, blood pressure,
temperature, vibration.
 One-dimensional signals: function depends on a single
variable, e.g., speech signal
 Multi-dimensional signals: function depends on two or
more variables, e.g., image
Fundamentals of Signals and Systems Fundamentals of Signals and Systems
Ø System: an entity or operator that manipulates
one or more signals to accomplish a function,
thereby yielding new signals.
 Commonly encountered systems:
communications systems
Automatic speaker recoginition system
Aircraft landing system
.
Input signal
Output signal
System
Page 5


SIGNAL AND SYSTEM SIGNAL AND SYSTEM
General Introduction General Introduction
? What are they?
? Signal
? System
Fundamentals of Signals and Systems Fundamentals of Signals and Systems
Ø Signal: a function of one or more variables that convey
information on the nature of a physical  phenomenon.
Examples: v(t),i(t),x(t),heartbeat, blood pressure,
temperature, vibration.
 One-dimensional signals: function depends on a single
variable, e.g., speech signal
 Multi-dimensional signals: function depends on two or
more variables, e.g., image
Fundamentals of Signals and Systems Fundamentals of Signals and Systems
Ø System: an entity or operator that manipulates
one or more signals to accomplish a function,
thereby yielding new signals.
 Commonly encountered systems:
communications systems
Automatic speaker recoginition system
Aircraft landing system
.
Input signal
Output signal
System
? 1. CT and DT signals:
Classification of signals Classification of signals