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

Figure 4

(a) Two overlapping LPM ultrasonic echoes at distances of 0.65 m and 0.7 m from a sound source. (b) Estimation of two overlapping LPM ultrasonic echoes. (c) Three overlapping LPM ultrasonic echoes at distances of 0.5 m, 0.65 m, and 0.75 m from a sound source. (d) Estimation of the three overlapping LPM ultrasonic echoes.

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