Time Domain Representation of Continuous and Discrete Signals
85
f(n) versus n
f(n) is decimated with M=2
f(n) is decimated with M=4
4
2
0
−2
−4
4
2
0
−2
−4
Amplitude
Amplitude
Amplitude
time index n
0
50
100
4
2
0
0
10
−2
−4
time index n
20
30
time index n
0
20
40
60
f(n) is decimated with M=10
4
2
0
−2
−4
Amplitude
0
5
1 0
time index n
FIGURE 1.70
Decimation plots of f(t) of Example 1.17.
f(n) versus n
f(n) is upsampled with L=4
4
0
−2
−4
2
Amplitude
Amplitude
time index n
0
50
100
f(n) is upsampled with L=2
4
2
0
−2
−4
Amplitude
0
50
100
150
200
time index n
f(n) is upsampled with L=10
4
2
0
−2
−4
Amplitude
0
500
time index n
1000
4
2
−2
−4
0
0
100
200
300
400
time index n
FIGURE 1.71
Interpolation plots of f(t) of Example 1.17.
CRC_47760_CH001.indd 85
CRC_47760_CH001.indd 85
7/25/2008 4:16:27 PM
7/25/2008 4:16:27 PM