Digital Signal Processing Reference
In-Depth Information
a
Input AUTOCORRELATION FUNCTION
0.5
0
-0.5
-1
-10
-5
0
5
10
τ
b
Input PSD
1
0.9
0.8
0.7
0.6
0.5
0.4
ω
ω
πδ
(
-
o)
πδ
(
ω
+
ω
o)
0.3
0.2
0.1
0
-3
-2
-1
0
1
2
3
ω
Fig. 7.29
(
a
) Input ACF. (
b
) Input PSD
7.6 MATLAB Exercises
Exercise M.7.1
(MATLAB file
exercise_M_7_1.m
) Using the periodogram
method, estimate the PSDs and show PSD plots for two white signals
X
1
(normal)
and
X
2
(uniform), both with
m ¼
0 and
s
2
¼
1.
Solution
The PSD is estimated using the MATLAB file
periodogram.m
The estimated PSDs are shown in Fig.
7.30
in a normal scale and in a logarithmic
scale in Fig.
7.31
.
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