Biomedical Engineering Reference
In-Depth Information
Figure 5.20
Frequency-wavenumber spectra of plane waves: (
a
) spatiotemporal (left) and
frequency-wavenumber (right) representations of a sinusoidal wave of frequency
f
1
traveling at
propagation velocity
v
1
; (
b
) sinusoidal wave of frequency
f
2
traveling at propagation velocity
v
2
; (
c
)
sum of the above. The two-dimensional PSDs clearly show the component waveform spectra and
propagation velocity.
the classical and high-resolution spectral estimation approaches. As shown in Figure 5.21,
using spatiotemporal data
g
(
t,r
),
…
…
x
0,0
x
0,1
.
.
.
x
0,
R
1
x
1,0
x
1,1
.
.
.
x
1,
R
1
x
N
1,0
x
N
1,1
.
.
.
x
N
1,
R
1
g
(
t
,
r
)
…
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