Time Domain Representation of Continuous and Discrete Signals
79
Various moving averages
10
5
0
signal
signal+noise
moving ave/2term
signal
signal+noise
moving ave/3term
signal
signal+noise
moving ave/4term
0
2
4
6
8
10
12
14
16
18
20
magnitude
magnitude
magnitude
10
10
5
5
0
0
0
0
2
2
4
4
6
6
8
8
10
10
12
12
14
14
16
16
18
18
20
20
time index n
FIGURE 1.64
Plots of various moving averages of Example 1.15.
FIGURE 1.65
Plots of f(n), [f(n) + n(t)], and best moving average of Example 1.15.
Best approximation using moving averages
signal
signal+noise
moving ave/2term
7
6
5
4
3
2
1
0
0
2
4
6
8
10
12
14
16
18
20
magnitude
time index n
CRC_47760_CH001.indd 79
CRC_47760_CH001.indd 79
7/25/2008 4:16:26 PM
7/25/2008 4:16:26 PM