Digital Signal Processing Reference
In-Depth Information
x
(
t
)
y
(
t
)
1
2
1
1
0
1
2
t
(a)
Amplifier
1
x
(
t
)
3
x
(
t
)
3
x
(
t
)
1
3
(b)
3
x
( )
1
2
1
1
0
1
2
1
4
2
0
2
t
2
2
(c)
3
x
(1
t/
2)
1
2
1
2
0
2
t
1
Figure 2.5
Signals for Examples 2.2 and
(d)
2.3.
which has (1) the time transformation of Example 2.1 and Figure 2.4 and (2) the amplitude
transformation of Example 2.2 and Figure 2.5(c). To plot this transformed signal, we first
transform the amplitude axis, as shown in Figure 2.5(c). The
t
-axis of Figure 2.4(a) is redrawn
in Figure 2.5(c) to facilitate the time transformation.
t
2
Q t = 2 - 2t.
t = 1 -
