.png){kind=icon}
返回
Antenna Array Calibration Using a Sparse Scene
.png){kind=icon}
OA
AI
DOI：10.1109/OJAP.2021.3061935.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
In radar systems, antenna arrays acquire direction-dependent information to localize targets or create images of the environment. However, because of unknown complex amplitudes per channel and mutual coupling, a calibration is necessary for good performance. Common calibration approaches measure to targets under known angles in a multipath-free far-field environment, which often can only be provided by anechoic chambers. Therefore, this process is not suitable for low-cost and frequent calibration. To overcome these limitations, this paper proposes a novel calibration approach using an unknown but sparse target scene. Multiple measurements at known relative positions of the radar are combined to a synthetic aperture. Then, the full mutual coupling matrix is estimated simultaneously with the unknown target scene. The method requires neither target position information, far-field conditions, nor an anechoic chamber because multipath propagation can be suppressed easily for targets located in the near-field. The proposed calibration approach is validated by measurements of a commercial 77GHz radar. The performance is evaluated by comparing the achieved image quality using the calibration results of this work and the radar's ex-factory calibration data. The proposed novel calibration procedure improves the image quality, while considerably lowering the demands on the calibration measurements and environment.
Keyword:
Antenna measurements
Mutual coupling
Anechoic chambers
Radar antennas
Calibration
Synthetic aperture radar
Antenna arrays
Antenna array
calibration
compressed sensing
mutual coupling
radar
sparsity
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
I
IF:
3.6
论文数:
823
被引数:
1.6K
机构
引用论文
Isothermal Titration Microcalorimetry Reveals the Cooperative and Noncompetitive Nature of Inhibition of Sinorhizobium meliloti L5-30 Dihydrodipicolinate Synthase by (S)-Lysine.png)
Biochemistry
BiochemistryIF0
PREAI
分享收藏分享收藏Indoleamine 2, 3-dioxygenase inhibitors in immunochemotherapy of breast cancer: challenges and opportunities乳腺癌免疫化疗中的吲哚胺2，3-双加氧酶抑制剂: 挑战与机遇BioImpacts
OAAI
BioImpactsIF0
OAAI分享收藏
查看更多内容