| 基于分布式时延矢量联合估计的血流检测算法 |
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| 引用本文： | 肖杨,余建国. 基于分布式时延矢量联合估计的血流检测算法[J]. 声学技术, 2011, 30(3): 227-231. DOI: 10.3969/j.issn.1000-3630.2011.03.005 |
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| 作者姓名： | 肖杨 余建国 |
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| 作者单位： | 复旦大学电子工程系,上海,200433 |
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| 基金项目： | 上海市重点学科建设资助项目(B112) |
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| 摘 要： | 依据超声血流散射回波信号的产生机理,引入更精确的分布式回波阵列模型来代替传统的点目标模型.基于散射子的运动效应对序列脉冲串激励信号的检测回波之间产生的附加时延效应,定义函数形式已知的分布式时延矢量,该矢量含有两个未知参数:中心速度和分布参数,利用其与回波阵列协方差矩阵的噪声子空间的正交特性,进行二维参数的联合搜索.搜索...
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| 关 键 词： | 分布式回波阵列 时延矢量 联合搜索 流速剖面 |
| 收稿时间： | 2011-06-07 |
| 修稿时间： | 2010-10-25 |
A blood flow movement measurement method based on joint time-delay vector estimation of distributed echo array |
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| XIAO Yang and YU Jian-guo. A blood flow movement measurement method based on joint time-delay vector estimation of distributed echo array[J]. Technical Acoustics, 2011, 30(3): 227-231. DOI: 10.3969/j.issn.1000-3630.2011.03.005 |
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| Authors: | XIAO Yang and YU Jian-guo |
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| Affiliation: | XIAO Yang,YU Jian-guo(Department of Electronic Engineering,Fudan University,Shanghai 200433,China) |
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| Abstract: | According to the ultrasonic echo signal mechanism from the human blood,the distributed model firstly men-tioned in this paper represents the echo array more accurately than the conventional point source model.As a time-delay problem,a vector corresponding to a known distribution function is defined,which has two unknown pa-rameters including a central velocity and a distribution parameter.By the two-dimensional joint search,the two pa-rameters can be estimated using orthogonal property between noise subspac... |
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| Keywords: | distributed echo array time-delay vector joint estimation velocity profile |
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