To show the benefits more clearly, Figure 10(c) shows the Doppler profile with the 2nd beam bin and the 141st range bin, which have the same direction and range with the injected target.
From the comparison results in range-Doppler spectrum and Doppler profile, the proposed algorithm can absolutely restrain radio and clutter while introducing no false target outside the injected target position.
The Doppler profile, on the other hand, is a TF-dependent function that depends only on the channel's angular statistics.
In the remainder of this section, we present some graphical examples of the 4D TF-CF [R.sub.H](t, f; [DELTA]t, [DELTA]f) in (45) and the corresponding time-varying delay profile [P.sub.H](t; [tau]) and TF-dependent Doppler profile [D.sub.H](t, f; v).
Time-Frequency Dependent Doppler Profile. Finally, Figure 6 shows a 3D graph and a contour plot of the TF-varying Doppler profile [D.sub.H](t, f; v) evaluated at t = 0.8[T.sub.0].
Caption: Figure 6: Absolute value of the TF-varying Doppler profile [D.sub.H](t, f; v) for t = 0.8[T.sub.0] and [T.sub.0] = 320 ms.
Caption: Figure 7: Contour plot of the absolute value of the TF-varying Doppler profile [D.sub.H](t, f; v) for t = 0.8[T.sub.0], [T.sub.0] = 320 ms, and an extended observation window in the frequency domain.
In 24 chapters, anesthesiologists and cardiologists from the US explain the principles of ultrasound and Doppler ultrasound; transducers and instrumentation; equipment, infection control, and safety; quantitative M-mode and 2D echocardiography; quantitative Doppler; Doppler profiles
and assessment of diastolic function; cardiac, pericardium and extra-cardiac, and cardiac valve anatomy and pathology; intra-cardiac masses and devices; left ventricular and segmental left ventricular systolic function; the 17 segment model; assessment of perioperative events and problems; congenital heart disease; artifacts and pitfalls; related diagnostic modalities; the structured TEE examination; and sonographic formulas.