Digital Signal Processing Reference
In-Depth Information
3
3
PADE: FPT
(−)
B
0
=7T
B
0
=7T
FOURIER: FFT
2.5
2.5
N/32 = 64
N/32 = 64
2
2
1.5
1.5
1
1
0.5
0.5
0
0
5
4
3
2
1
5
4
3
2
1
(i) Chemical shift (ppm)
(iv) Chemical shift (ppm)
3
3
PADE: FPT
(−)
FOURIER: FFT
B
0
=7T
B
0
=7T
2.5
2.5
N/16 = 128
N/16 = 128
2
2
1.5
1.5
1
1
0.5
0.5
0
0
5
4
3
2
1
5
4
3
2
1
(ii) Chemical shift (ppm)
(v) Chemical shift (ppm)
3
3
PADE: FPT
(−)
FOURIER: FFT
B
0
=7T
B
0
=7T
2.5
2.5
N/8 = 256
N/8 = 256
2
2
1.5
1.5
1
1
0.5
0.5
0
0
5
4
3
2
1
5
4
3
2
1
(iii) Chemical shift (ppm)
(vi) Chemical shift (ppm)
FIGURE 7.9
Fourier (left) and Pade (right) absorption spectra using the FFT and FPT
(−)
,
respectively, from the FID encoded at B
0
=7T [141], shown at 3 partial signal
lengths (N/32 = 64,N/16 = 128,N/8 = 256).
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