Digital Signal Processing Reference
In-Depth Information
Answers to Selected Problems
CHAPTER 2
2.1.
Hint:
b.
Xf
s
()
2.5 /
T
f
kHz
8
16
−
1.5
1.5
6.5
9.5
14.5
17.5
−
9.5
−
8
−
6.5
2.2.
Hint:
a.
Xf
s
()
2.
/
T
kHz
f
−
11.2
−
10.5
−
5.5
−
4.8
−
3.2
−
2.5
2.5
3.2 4.8
5.5
8
10.5
11.212.8
13.5
16
18.5
19.2
2.5.
Hint:
Xf
s
()
2.
/
T
f
kHz
−
11.5
−
10.5
−
5.5
−
4.5
−
3.5
−
2.5
2.5
3.5 4.5
5.5
8
10.5
11.5 12.5
13.5
16
18.5 19.5
c.
The aliasing frequency
¼
3.5 kHz
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