Doppler Velocity Estimation of Overlapping Linear-Period-Modulated Ultrasonic Waves Based on an Expectation-Maximization Algorithm

Table 1

Estimation results for the two overlapping LPM ultrasonic echoes with 10 dB SNR.

LPM ultrasonic signals	First echo	Second echo
Actual velocities (m/s)	−5	3.5
	3.6	−1.6
	3.3	2
Estimated velocities (m/s)	−4.95	3.55
	3.65	−1.65
	3.3	1.95