Research Article
Fractional Fourier Transform for Ultrasonic Chirplet Signal Decomposition
Table 5
Estimated parameters of chirplets (block with 4 mm SDH).
| | Chirplet parameters | Refracted angle | | 0° | 30° | 45° |
| | Amplitude (m-Volt) |
87.75
|
59.34
|
32.61
| | Spherically focused transducer | Time of arrival (us) |
76.10
|
82.05
|
88.88
| | Frequency (MHz) |
4.61
|
4.54
|
4.39
|
| | Amplitude (m-Volt) |
41.72
|
37.62
|
27.97
| | Planar transducer | Time of arrival (us) |
76.11
|
82.36
|
89.42
| | Frequency (MHz) |
4.46
|
4.67
|
4.84
|
|
|
