Digital Signal Processing Reference
In-Depth Information
3
3
PADE: FPT
(−)
FOURIER: FFT
B
0
=7T
B
0
=7T
2.5
2.5
N/4 = 512
N/4 = 512
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/2 = 1024
N/2 = 1024
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
(−)
B
0
=7T
B
0
=7T
FOURIER: FFT
2.5
2.5
N = 2048
N = 2048
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 7.10
Fourier (left) and Pade (right) absorption spectra using the FFT and FPT
(−)
,
respectively, from the FID encoded at B
0
=7T [141], shown at 2 partial signal
lengths (N/4 = 512,N/2 = 1024) as well as the full signal length N = 2048.
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