IEEE Access 2023 | Precise 2D and 3D Fluoroscopic Imaging by Using an FMCW Millimeter-Wave Radar

原始笔记链接:https://mp.weixin.qq.com/s?__biz=Mzg4MjgxMjgyMg==&mid=2247486665&idx=1&sn=6a3174ae4412f32160a4348c84765480&chksm=cf51be30f82637265c90104969e2bbfe0244eac26f7b15e66782bd4698eacaedba3141f4153c#rd
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IEEE Access 2023 | Precise 2D and 3D Fluoroscopic Imaging by Using an FMCW Millimeter-Wave Radar

IEEE Access 2023 | Precise 2D and 3D Fluoroscopic Imaging by Using an FMCW Millimeter-Wave Radar_第1张图片

毫米波雷达综述论文阅读笔记: IEEE Access 2023 | Precise 2D and 3D Fluoroscopic Imaging by Using an FMCW Millimeter-Wave Radar

Abstract

  • 本文
    • utilized MIMO-SAR to achieve 2D and 3D imaging
  • 方法
    • analyzing IF signal from transmitted and received chirp signals

      ⇒ \Rightarrow obtained Range FFT spectra with object distance and reflection intensity info

    • Integration of reflection intensity

      ⇒ \Rightarrow provide 不同距离下的综合图象

    • Developed data processing techniques for 3D imaging

  • 实验结果
    • 对箱子内隐藏物体的高分辨成像: spatial resolution < 1 mm

    • 重建穿着衣服的人的表面图像 :3D image of clothed human body surface

      ✅ 能够 identify concealed dangerous objects

I. INTRODUCTION

mmWave (30-300 GHz) have gained research attention for imaging due to advantages

  • imaging through obstacles
  • 无安全风险
  • 全天时全天候

本文目标:毫米波precise 3D shape measurement and processing

  • 用于非接触安检

挑战1:系统体积

  • 已有方法:系统过大、成本高
  • 本文:使用TI IWR1443, 成本低

挑战2:曲面成像

  • 已有方法:平面物体成像
    • poor visibility due to lack of 3D contour data processing

IEEE Access 2023 | Precise 2D and 3D Fluoroscopic Imaging by Using an FMCW Millimeter-Wave Radar_第2张图片

  • 本文:3D contour data processing
    • 处理点云,to faithfully reconstruct 3D shapes

II. MILLIMETER-WAVE FMCW RADAR SYSTEM

IEEE Access 2023 | Precise 2D and 3D Fluoroscopic Imaging by Using an FMCW Millimeter-Wave Radar_第3张图片

  • 系统概述

    • IWR1443 mmWave module
    • mounted on 2-axis stage for X-Z scanning
    • 77-81 GHz range, 40 μs duration
  • 数据处理

    • Received signal ⇒ \Rightarrow IF signal

    • IF signal ⇒ \Rightarrow Range FFT spectrum

      ✅ each peak in the spectrum reflects the position of the object surface

  • MIMO-SAR

    • MIMO: multiple Tx and Rx antennas
    • SAR: virtual track, transmit and receive signals while moving
    • Range resoltuion: 3.75 cm ( Δ r = c 2 B \Delta_r = \frac{c}{2B} Δr=2

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