Digital Signal Processing Reference
In-Depth Information
NORMAL
S
IGNAL X1
1
0.5
0
-100
-50
0
50
100
UNIFORM
S
IGNAL X2
1
0.5
0
-100
-50
0
50
100
Fig. 7.32
ACFs in Exercise M.7.1
NORMAL SIGNAL X1
UNIFORM SIGNAL X2
10
0
10
0
0
0.2
0.4
0
0.2
0.4
ω
ω
NORMAL SIGNAL X1
UNIFORM SIGNAL X2
1
1
0.5
0.5
0
0
−100
0
100
−100
0
100
Fig. 7.33
PSDs and ACFs in Exercise M.7.1
signals
X
1
and
X
2
from Exercise M.6.7, respectively. Using the periodogram
method, estimate their PSDs and show the PSD plots for
A ¼
1 and
A ¼
2.
Solution
The PSD is estimated using the MATLAB file
periodogram.m
The estimated PSDs for
A ¼
1 on a linear and a logarithmic scale are shown in
Figs.
7.34
. and
7.35
. Figures
7.36
and
7.37
show the estimated PSDs for
A ¼
2.
Note the peaks in the PSDs at the frequency of sinusoidal signal.
Search WWH ::
Custom Search