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Isomorphism between pulsed-wave Doppler ultrasound and direction-of-arrival estimation. II. Experimental results

机译:脉冲多普勒超声和到达方向估计之间的同构。二。实验结果

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For pt. I see ibid., vol. 43, no. 5, p. 911-22 (1996). Pt. I presented the basic principles for applying high-resolution wide-band direction-of-arrival estimation techniques to pulsed-wave Doppler ultrasound. Such techniques provide high-resolution velocity profiles and enable the identification of multiple velocity components inside a sample volume. Another important application is the identification and rejection of wall clutter signals. A first and essential step in applying these techniques is to convert the wide-band echoes to narrow band. The 2D DFT projection method is used for this conversion. Two different narrow-band high-resolution methods are then applied to estimate the velocity distributions; the minimum variance (MV) and the multiple signal classification (MUSIC). Experimental results are presented to illustrate the potentials and limitations of applying wide-band DOA methods to different applications in pulsed-wave Doppler ultrasound.
机译:对于pt。我看同上。 43号5,第911-22(1996)。铂我介绍了将高分辨率宽带到达方向估计技术应用于脉冲波多普勒超声的基本原理。此类技术可提供高分辨率的速度曲线,并能够识别样品体积内的多个速度分量。另一个重要的应用是壁杂波信号的识别和抑制。应用这些技术的第一步也是必不可少的步骤是将宽带回波转换为窄带。 2D DFT投影方法用于此转换。然后应用两种不同的窄带高分辨率方法来估计速度分布。最小方差(MV)和多信号分类(MUSIC)。给出实验结果以说明在脉冲波多普勒超声中将宽带DOA方法应用于不同应用的潜力和局限性。

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