DTFT, DFT, ZT, and FFT
533
Time
0
500
1000
1500
2000
frequency in Hz
Frequency
2500
3000
3500
4000
0
500
1000
1500
2000
2500
3000
3500
4000
5
0
200
400
600
−10
0
0
0.005
0.01
0.015
0.02
0.025
0.03
0.035
10
0
Phase of
DFT[f(n-32)]
Magnitude
DFT[f(n-32)]
Amplitude in time
−5
f(n-32) analyzed in the time and frequency domains
FIGURE 5.45
Plots of f(n − 32) in time and frequency of Example 5.10.
Error analysis in the time and frequency domains
0
1000
500
0
0
500
1000 1500 2000 2500 3000 3500 4000 4500
0
0
2
4
6
500
1000 1500 2000 2500
frequency in Hz
3000 3500 4000 4500
−10
−5
0
5
0.005
0.01
0.015
0.02
0.025
0.03
0.035
Phase
Magnitude
Magnitude in time
Time
Frequency
FIGURE 5.46
Error plots in time and frequency of Example 5.10.
CRC_47760_CH005.indd 533
CRC_47760_CH005.indd 533
7/23/2008 1:47:37 PM
7/23/2008 1:47:37 PM