Research Article
Fractional Fourier Transform for Ultrasonic Chirplet Signal Decomposition
Table 4
Estimated parameters of chirplets (block with 1 mm SDH).
| | Chirplet parameters | Refracted angle | | 0° | 30° | 45° |
| | Amplitude (m-Volt) | 42.5 | 29 | 16.01 | Spherically focused transducer | TOA (us) | 76.62 | 82.6 | 89.39 | | Frequency (MHz) | 4.55 | 4.6 | 4.32 |
| | Amplitude (m-Volt) | 22.71 | 20.43 | 14.53 | Planar transducer | TOA (us) | 76.57 | 82.80 | 89.82 | | Frequency (MHz) | 4.48 | 4.67 | 4.81 |
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