Digital Signal Processing Reference
In-Depth Information
ABSORPTION SHAPE SPECTRA (TOTAL: Left and COMPONENT: Right) in FPT
(−)
; FID LENGTH: N
P
= 180, 220, 260
Absorption Component Shape Spectra
Absorption Total Shape Spectrum
18
18
PADE: FPT
(−)
PADE: FPT
(−)
B
0
=1.5T
B
0
=1.5T
N
P
= 180
N
P
= 180
14
6
14
5+6+7
Peak 11 unresolved
Peak 12 overestimated
Converged
14+15
10
10
16+17
15
8
22+23
9
6
7
6
10
16
21
19
20
11+12
1+2
22
3+4
8
9
21
19
20
12
13
18
14
10
17
18
25
5
3
24
2
2
1
2
25
13
24
4
23
0
0
5
4
3
2
1
5
4
3
2
1
(i) Chemical shift (ppm)
(iv) Chemical shift (ppm)
Absorption Component Shape Spectra
Absorption Total Shape Spectrum
18
18
PADE: FPT
(−)
PADE: FPT
(−)
B
0
=1.5T
B
0
=1.5T
N
P
= 220
N
P
= 220
14
14
6
5+6+7
Converged
Converged
14+15
10
10
16+17
15
8
22+23
9
6
7
6
10
21
19
20
11+12
16
1+2
22
3+4
8
9
21
19
20
13
18
10
17
18
14
12
25
5
3
24
2
1
2
2
25
24
13
4
11
23
0
0
5
4
3
2
1
5
4
3
2
1
(ii) Chemical shift (ppm)
(v) Chemical shift (ppm)
Absorption Component Shape Spectra
Absorption Total Shape Spectrum
18
18
PADE: FPT
(−)
PADE: FPT
(−)
B
0
=1.5T
B
0
=1.5T
N
P
= 260
N
P
= 260
14
14
6
5+6+7
Converged
Converged
14+15
10
10
16+17
15
8
22+23
6
6
9
7
10
21
16
19
20
11+12
1+2
22
3+4
8
9
21
19
20
18
13
17
14
12
10
25
5
24
3
2
1
2
2
25
24
18
13
11
4
23
0
0
5
4
3
2
1
5
4
3
2
1
(iii) Chemical shift (ppm)
(vi) Chemical shift (ppm)
FIGURE 3.11
Absorption component shape spectra (left) and absorption total shape spec
tra (right) from the FPT
(−)
near full convergence for signal lengths N
P
=
180, 220, 260. On panel (iv) for N
P
= 180, the total shape spectrum reached
full convergence, despite that on panel (i) for the corresponding component
shape spectra, the 11th peak is missing and the 12th peak is overestimated.
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