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

Figure 3

Iterations for overlapping LPM ultrasonic echoes with a 0.05 m/s step of the grid-search method. (a) Two overlapping LPM ultrasonic echoes with and of 3.3 m/s and 2 m/s, respectively. (b) Three overlapping LPM ultrasonic echoes with , , and of 1 m/s, −2 m/s, and 5 m/s, respectively.

(a)

(b)