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Algorithms for Millimeter Wave Imaging and Sensing

机译：毫米波成像和传感算法

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摘要

"Millimeter waves" have enabled potential solutions to key problems in the field of security scanning, medical imaging, automotive radars and next generation wireless communication systems. These applications have become possible due to the advancements in semiconductor technology, permitting inexpensive and densely packed millimeter wave circuits. Imaging and locating targets of interest with millimeter and terahertz waves have experienced dramatic performance improvement due to the higher bandwidth and smaller size of antenna elements at millimeter wave frequencies.;This dissertation develops novel signal processing algorithms to improve the performance of millimeter wave imaging and sensing systems. A two dimensional beamforming based millimeter wave imaging technique is formulated, which can reconstruct targets in the near field of an antenna array. The technique shows improved performance over existing switched array imaging. Besides the algorithmic development, a mathematical analysis is performed to investigate the sensitivity of the proposed imaging technique in the presence of phase errors.;The later part of this dissertation concentrates on imaging of targets in the far field of an imaging antenna array. Novel algorithms are designed to localize targets jointly across multiple dimensions using superresolution techniques. For the real time implementation of these algorithms, the emphasis is given on the computational cost reduction.;Finally, the low complexity far field imaging algorithms are validated with electromagnetic simulators as well as with 24 GHz radar testbed built at The University of Texas at Dallas. Details of radar testbed prototyping and antenna design are also presented.
机译：“毫米波”已为安全扫描，医学成像，汽车雷达和下一代无线通信系统领域中的关键问题提供了潜在的解决方案。由于半导体技术的进步，这些应用成为可能，从而允许使用廉价且密集的毫米波电路。由于毫米波频率上天线元件的带宽更高和尺寸更小，毫米波和太赫兹波感兴趣的成像和定位目标经历了显着的性能改善。系统。提出了一种基于二维波束成形的毫米波成像技术，该技术可以在天线阵列的近场中重建目标。与现有的开关阵列成像相比，该技术显示出更高的性能。除了算法的发展外，还进行了数学分析，以研究所提出的成像技术在存在相位误差的情况下的灵敏度。本文的后半部分着重于成像天线阵列远场中的目标成像。新型算法旨在使用超分辨率技术在多个维度上共同定位目标。对于这些算法的实时实现，重点在于降低计算成本。最后，低复杂度远场成像算法已通过电磁仿真器以及德克萨斯大学达拉斯分校建造的24 GHz雷达测试平台进行了验证。 。还介绍了雷达测试台原型和天线设计的详细信息。

著录项

  • 作者

    Patole, Sujeet.;

  • 作者单位

    The University of Texas at Dallas.;

  • 授予单位 The University of Texas at Dallas.;
  • 学科 Electrical engineering.
  • 学位 Ph.D.
  • 年度 2017
  • 页码 97 p.
  • 总页数 97
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 康复医学;
  • 关键词

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