Digital Signal Processing Reference
In-Depth Information
12.4. a.
y
()
x
()
w
()
Interpolation
filter H(z
)
↑
3
f
=
24000
Hz
f
= 8000
Hz
f
=
24000
Hz
sL
s
sL
b.
Hamming window,
N ¼
133,
f
c
¼
3
;
700 Hz
12.7. a.
x
()
y
()
Interpolation
filter H1(z)
Anti-aliasing
filter H2(z)
4
↓
3
b.
Combined filter
HðzÞ
: Hamming window,
N ¼
133,
f
c
¼
2
;
700 KHz
12.8. a.
S
1
S
2
x
()
y
()
Anti-aliasing
filter H1(z)
320 kHz
Anti-aliasing
filter H2(z)
↓
↓
10
4
8kHz
32 kHz
f
=
s
b.
M
1
¼
10 and
M
2
¼
4
c.
Filter specification for
H
1
ðzÞ
: Hamming window,
N ¼
43,
f
c
¼
15
;
700 Hz
d.
Filter specification for
H
2
ðzÞ
: Hamming window,
N ¼
177,
f
c
¼
3
;
700 Hz
12.9.
(a)
wn
0
()
x
()
ym
0
()
y
(
)
↑
−
1
ρ
0
() .
z
=+
025 05
.
z
2
+
f
s
2
⋅
f
s
wn
1
()
ym
1
()
↑
ρ
1
() .
z
=
04
2
z
−1
(b)
wm
0
()
x
()
y
(
)
ym
0
()
↓
ρ
0
() .
z
=+
025 05
.
z
−
1
+
2
f
s
2
f
s
z
−1
wm
1
()
ym
1
()
↓
ρ
1
() . .
z
=+
04 06
z
−
1
2
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