Digital Signal Processing Reference
In-Depth Information
4.1.2 Properties
P.1
The PDF is symmetrical around its mean value.
The shape of the PDF remains the same for different values of
m
and is only shifted
along the
x
-axis, as shown in Fig.
4.2a
,b.
a
m=
-
3
m=
-
1
0.2
0.2
0.15
0.15
0.1
0.1
0.05
0.05
0
-
0
20
-
10
-
20
-
10
0
10
0
10
x
x
m=2
m=5
0.2
0.2
0.15
0.15
0.1
0.1
0.05
0.05
0
0
-
10
0
x
10
-
10
0
10
x
b
2
=4
NORMAL PDF
s
0.2
0.18
m=
-
3
0.16
0.14
m=5
0.12
0.1
m=
-
1
0.08
m=2
0.06
0.04
0.02
0
-
15
-
10
-
5
0
5
10
15
x
Fig. 4.2
Normal PDFs for different values of
m
and the variance
s
2
ΒΌ
4
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