• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >A Sub-Nyquist, Variable Sampling, High-Frequency Phased Array Beamformer
【24h】

A Sub-Nyquist, Variable Sampling, High-Frequency Phased Array Beamformer

机译：亚奈奎斯特，可变采样，高频相控阵波束形成器

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A digital receive beamformer implementing a “one sample per pixel” variable sampling technique is described. The sampling method reduces the required sampling rates by a factor of 3, and reduces the data capture rate by a factor of 2, in comparison with the previous systems based on variable sampling. The sampling method is capable of estimating broadband pulse envelopes accurate for bandwidths up to 83.0%. This beamforming method has been implemented on a field-programmable gate array with maximum transmit and receive delay errors measured to be less than ±1.0 ns. The beamformer was tested and verified on a previously described 45-MHz 64-element phased array. The system generates images with 128 lines, 512 pixels per RF line, and 2 transmit focal zones. The system generates images with approximately 55 dB of dynamic range and was tested by imaging wire targets submersed in a water bath, wire targets embedded in a tissue phantom, and real-time in vivo imaging of a human wrist.
机译：描述了一种实现“每像素一个样本”可变采样技术的数字接收波束形成器。与以前的基于可变采样的系统相比，该采样方法将所需的采样率降低了3倍，并将数据捕获率降低了2倍。采样方法能够准确估计带宽高达83.0％的宽带脉冲包络。该波束成形方法已在现场可编程门阵列上实现，其最大发射和接收延迟误差测得小于±1.0 ns。在先前描述的45-MHz 64元素相控阵上对波束形成器进行了测试和验证。该系统生成的图像具有128条线，每条RF线512个像素和2个发射焦点区。该系统生成的图像具有大约55 dB的动态范围，并通过对浸没在水浴中的线靶成像，嵌入组织体模中的线靶成像以及人手腕的实时体内成像进行了测试。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号