EE 3120
Chapter 1
Lecture 3
Manipulation of Signals in
Time

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Manipulation of Signals in time
We can manipulate signals many different ways – first steps in signal processing
Shifting
f(t) = sin(t)
f(t-T) shifting right T seconds
f(t+T) shifting left T seconds
f(t-T) = sin(t-T)
f(t) = sin(t+T)

Manipulation of Signals in time
Flipping or Reversing
f(t)
f(-t)
f(t)
f(-t)
f(2) = 2 ; for t = 2
f(-2) = 2 ; for t = 2

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