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8/14/2019 ANALOG COMMUNICATION Lecture 02
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Introduction to Signals
Lecture 02
Mansoor Khan
EEE352 Analog Communication Systems
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Signals
A signal is a set of information or data.
Examples
a telephone or television signal,
monthly sales of a corporation,
the daily closing prices of a stock market
We deal exclusively with signals that are functions
of time.
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01/10/2009 EEE 352 3
Speech Signal
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Energy of Signals
The signal energy Eg ofg(t) is defined (for a
real signal) as
In the case of a complex valued signal g(t), the
energy is given by
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Energy Signals
A signal g(t) is an energy signal ifEg