毫米波点云生成论文 阅读笔记 | 3D Point Cloud Generation with Millimeter-Wave Radar
毫米波点云生成论文 | 3D Point Cloud Generation with Millimeter-Wave Radar
Kun Qian, Zhaoyuan He, Xinyu Zhang
UCSD
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (ACM IMWUT)
原始论文地址: http://xyzhang.ucsd.edu/papers/KQian_UbiComp21_RadarPointCloud.pdf
Video地址:ACM SIGCHI官方频道
本文为毫米波点云生成论文
3D Point Cloud Generation with Millimeter-Wave Radar
的阅读笔记, 原载于R.X. NLOS的博客
大量参考了作者的 Pre-recorded presentations for UbiComp/ISWC 2021, September 21–26
笔记难免存在问题,欢迎联系 981591477@qq.com 指正。
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文章目录
- 毫米波点云生成论文 | 3D Point Cloud Generation with Millimeter-Wave Radar
- 1 Introduction
- 2 困难和解决方法
- 3 实验与结果
- 总结
1 Introduction
- Sensors for Automomous Driving
- Lidar, Camera and Radar
- Radar is more robust against bad weathers
- Limitations of MmWave Radar (2 main drawbacks)
Extremely low resolution
❌ due to its small form factor
❌ only generates intensity maps with strong reflection peaks
Blindness due to specular reflection
❌ specularly reflected by most objects
- An Existing Solution: Non-coherent Imaging
Fusing measurements along the Radar’s moving trajectory
✅ To some extent, alleviate the specular reflection problem (by illuminating from diverse locations)
❌ The imaging resolution is still limited by the physical size of the antenna array
❌ Cannot be fundamentally improved through spatial sampling
- MilliPoint: Coherent Imaging
Raw radar measurements are directly combined with SAR
✅ low-end vehicle radars
✅ coherently combines measurements of the radar
✅ generate dense and high-resolution 3D point clouds
2 困难和解决方法
- Enabling SAR with Vehicle Radar
- Challenge 1: SAR requires accurate tracking of the radar
- 左图:uniform motion (位置已知)
- 右图: Variable motion (位置未知)、
- 结论: Without the knowledage of the radar’s location, the image of the object can be highly distorted
- Solution: a self cross-range tracking method
Radar Speed = Cross Range Movement / Elapsed Time
Observation: Different Tx-Rx pairs experience similar channel responses while moving along the cross-range
▪ The radar has equally spaced 4 antennas
▪ As the radar moves, the 1st antenna pair at time t1t_1t1 coincides with the 2nd antenna pair at time t0t_0t0
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