User`s guide

105
Figure 26 Data input to Fourier analysis and results
0
2
4
0 2 4 6 8 10 12 14 16 18 20
Magnitude
Frequency (Hz)
FFT result: f=10.02Hz
-2
0
2
0 0.2 0.4 0.6 0.8 1
data input when frequency is about 128 Hz, D=128 (N=7)
0
1
2
3
0 2 4 6 8 10 12 14 16 18 20
Magnitude
Frequency (Hz)
FFT result: f=10.08Hz
-2
0
2
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
data input when sampling frequency is about 32 Hz, D=32 (N=5)
0
1
2
3
0 2 4 6 8 10 12 14 16 18
Magnitude
Frequency (Hz)
FFT result: f=10.32Hz