Liu Jie, Kim Kang-Sik, Insana Michael F
Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
IEEE Trans Ultrason Ferroelectr Freq Control. 2007 May;54(5):1010-7. doi: 10.1109/tuffc.2007.346.
This paper defines the echo signal-to-noise ratio (eSNR) for pulse-echo systems that adapts to the effects of shift-varying impulse responses, spatiotemporal coding, and various beamformers. Measurement techniques using point targets or random scattering media can be interrelated for a broad range of experimental conditions through the eSNR. The eSNR definitions are also illustrated by comparing a spatial matched filter (SMF) beamformer to conventional dynamic receive focusing methods to evaluate performance based on resolution and sensitivity. Closed-form expressions are presented that predict eSNR gains from SMF approaches relative to other beamformers.
本文定义了适用于具有时变脉冲响应、时空编码和各种波束形成器的脉冲回波系统的回波信噪比（eSNR）。通过eSNR，在广泛的实验条件下，使用点目标或随机散射介质的测量技术可以相互关联。通过将空间匹配滤波器（SMF）波束形成器与传统动态接收聚焦方法进行比较，以基于分辨率和灵敏度评估性能，从而说明了eSNR的定义。给出了封闭形式的表达式，预测了相对于其他波束形成器，SMF方法的eSNR增益。
