Digital Signal Processing Reference
In-Depth Information
1.2
1.2
1
1
0.8
0.8
0.6
0.6
0.4
0.4
0.2
0.2
0
0
0
0.1
0.2
0.3
0.4
0.5
0
0.1
0.2
0.3
0.4
0.5
Frequency (Hz)
Frequency (Hz)
(a)
(b)
1.2
1.2
1
1
0.8
0.8
0.6
0.6
0.4
0.4
0.2
0.2
0
0
0
0.1
0.2
0.3
0.4
0.5
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
Frequency (Hz)
Frequency (Hz)
(c)
(d)
1.2
1.2
1
1
0.8
0.8
0.6
0.6
0.4
0.4
0.2
0.2
0
0
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0
0.1
0.2
0.3
0.4
0.5
Frequency (Hz)
Frequency (Hz)
(e)
(f)
2
n
FIGURE 3.1
:
Modulus of the gapped-data spectral estimates [
N
01, two
gaps involving 49 (40%) missing samples]. (a) True spectrum, (b) WFFT, (c) complete-data
WFFT, (d) complete-data APES, (e) WFFT with interpolated data via GAPES, and (f )
GAPES.
=
128,
σ
=
0
.
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