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Isomorphism between pulsed-wave Doppler ultrasound anddirection-of-arrival estimation. I. Basic principles

机译:脉冲多普勒超声与到达方向估计之间的同构一,基本原则

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Direction-of-arrival (DOA) estimation of signals is an importantnarea of research in sonar and radar signal processing. Over the last fewndecades, numerous techniques have been developed for high-resolution DOAnestimation. In this paper, we show that velocity measurement usingnpulsed-wave Doppler ultrasound and DOA estimation are isomorphicnproblems. We discuss a number of DOA methods and their potentialnapplication to flow velocity measurement using ultrasound. Wide-band DOAnmethods are of special interest because the pulses used for Dopplernultrasound are also wide band. These wide-band methods generally involvena preprocessing step to convert wideband signals to narrow band beforenapplying high-resolution techniques. Application of DOA methods tonDoppler ultrasound provides tools for high-resolution velocitynmeasurement, identification of multiple velocity components within ansample volume, and clutter rejection
机译:信号的到达方向(DOA)估计是声纳和雷达信号处理研究的重要领域。在过去的几十年中,为高分辨率DOA评估开发了许多技术。本文表明,利用脉冲多普勒超声进行速度测量和DOA估计是同构问题。我们讨论了许多DOA方法及其在超声波测量流速中的潜在应用。宽带DOAnmethod尤其令人关注,因为用于Dopplernultrasound的脉冲也是宽带的。这些宽带方法通常包括预处理步骤,以在应用高分辨率技术之前将宽带信号转换为窄带。 DOA方法的应用tonDoppler超声提供了用于高分辨率速度测量,识别样品体积内多个速度分量以及杂波抑制的工具

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