Research Article
Fractional Fourier Transform for Ultrasonic Chirplet Signal Decomposition
Table 8
Estimated parameters of the 8 dominant chirplets for ultrasonic experimental data.
| | (us) | (MHz) | | (MHz)2 | (MHz)2 | (Rad) |
| | Echo 1 |
2.95
|
3.87
|
1.06
|
20.16
|
13.17
|
2.80
| | Echo 2 |
3.47
|
5.53
|
0.63
|
56.86
|
−41.06
|
−2.70
| | Echo 3 |
0.33
|
6.57
|
0.54
|
37.45
|
28.66
|
1.76
| | Echo 4 |
1.18
|
7.24
|
0.54
|
27.14
|
30.17
|
3.71
| | Echo 5 |
2.08
|
6.66
|
0.53
|
39.13
|
−15.50
|
2.75
| | Echo 6 |
2.40
|
6.00
|
0.47
|
62.91
|
60.24
|
2.47
| | Echo 7 |
4.64
|
6.23
|
0.18
|
4.75
|
−0.18
|
−2.36
| | Echo 8 |
1.49
|
3.97
|
0.12
|
0.73
|
−0.04
|
−6.64
|
|
|
