A New Aliasing Extension Method for Ultrasonic 2-Dimensional Pulsed Doppler Systems
A New Aliasing Extension Method for Ultrasonic 2-Dimensional Pulsed Doppler Systems
复制标题
超声二维脉冲多普勒系统的新混叠扩展方法
DOI：
10.1177/016173468901100402
复制
发表时间：
1989
影响因子：
2.3
通讯作者：
S. B. Park
中科院分区：
文献类型：
--
作者：
K. Baek;M. Bae;S. B. Park
由脉冲重复频率引起的平均频率混叠问题是超声脉冲多普勒系统的主要限制之一。解决这个问题的传统方法是沿着时间轴跟踪接近和超过奈奎斯特频率的平均频率。本文针对同一问题，提出了沿空间轴沿着跟踪平均频率的新概念。该技术具有容错性，比传统方法更适合多门和2-D多普勒系统。仿真和实验结果表明，与传统系统相比，该系统具有更好的性能。
The mean frequency aliasing problem originating from the pulse repetition frequency is one of major limitations in ultrasound pulsed Doppler systems. A conventional approach to resolving this problem is to track the mean frequencies close to and beyond the Nyquist frequency along the temporal axis. In this paper, a new concept of tracking the mean frequencies along the spatial axis is proposed for the same problem. The technique is fault tolerable and more suitable for multigate and 2-D Doppler systems than conventional methods. Simulation and experimental results show that the proposed system has improved performance compared with that of the conventional systems.