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
$\uparrow$ 打开上述链接即可阅读全文

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

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

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

II. MILLIMETER-WAVE FMCW RADAR SYSTEM

• 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 (${\Delta }_r=2$