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