Sequential Frequency-Domain Imaging Algorithm for Near-Field MIMO-SAR With Arbitrary Scanning Paths

2019 ◽  
Vol 12 (8) ◽  
pp. 2967-2975 ◽  
Author(s):  
Rongqiang Zhu ◽  
Jianxiong Zhou ◽  
Binbin Cheng ◽  
Qiang Fu ◽  
Ge Jiang
Keyword(s):  
Frequency Domain ◽  
Near Field ◽  
Imaging Algorithm ◽  
Sequential Frequency

A High-resolution Imaging Algorithm for MIMO SAR Based on the Sub-band Synthesis in Frequency Domain

2011 ◽  
Vol 33 (5) ◽  
pp. 1082-1087 ◽  
Author(s):  
Yun-kai Deng ◽  
Qian Chen ◽  
Hai-ming Qi ◽  
Hui-fang Zheng ◽  
Ya-dong Liu
Keyword(s):  
High Resolution ◽  
Frequency Domain ◽  
High Resolution Imaging ◽  
Imaging Algorithm ◽  
Resolution Imaging

scholarly journals REGULARIZATION IMAGING ALGORITHM WITH ACCURATE G MATRIX FOR NEAR-FIELD MMW SYNTHETIC APERTURE IMAGING RADIOMETER

2014 ◽  
Vol 58 ◽  
pp. 193-203 ◽  
Author(s):  
Jianfei Chen ◽  
Yuehua Li ◽  
Jianqiao Wang ◽  
Yuanjiang Li ◽  
Yilong Zhang
Keyword(s):  
Near Field ◽  
Synthetic Aperture ◽  
Synthetic Aperture Imaging ◽  
Imaging Algorithm

scholarly journals Frequency-Diverse Holographic Metasurface Antenna for Near-Field Microwave Computational Imaging

2021 ◽  
Vol 8 ◽  
Author(s):  
Jiaqi Han ◽  
Long Li ◽  
Shuncheng Tian ◽  
Xiangjin Ma ◽  
Qiang Feng ◽  
...  
Keyword(s):  
Frequency Domain ◽  
Imaging System ◽  
Near Field ◽  
Horn Antenna ◽  
Computational Imaging ◽  
Simulation Studies ◽  
Field Patterns ◽  
Full Wave ◽  
Imaging Reconstruction ◽  
Iterative Shrinkage

This article presents a holographic metasurface antenna with stochastically distributed surface impedance, which produces randomly frequency-diverse radiation patterns. Low mutual coherence electric field patterns generated by the holographic metasurface antenna can cover the K-band from 18 to 26 GHz with 0.1 GHz intervals. By utilizing the frequency-diverse holographic metasurface (FDHM) antenna, we build a near-field microwave computational imaging system based on reflected signals in the frequency domain. A standard horn antenna is adopted to acquire frequency domain signals radiated from the proposed FDHM antenna. A detail imaging restoration process is presented, and the desired targets are correctly reconstructed using the 81 frequency-diverse patterns through full-wave simulation studies. Compressed sensing technique and iterative shrinkage/thresholding algorithms are applied for the imaging reconstruction. The achieved compressive ratio of this computational imaging system on the physical layer is 30:1.

A Frequency-Domain Imaging Algorithm for Translational Invariant Bistatic Forward-Looking SAR

2013 ◽  
Vol E96.B (2) ◽  
pp. 605-612 ◽  
Author(s):  
Junjie WU ◽  
Jianyu YANG ◽  
Yulin HUANG ◽  
Haiguang YANG ◽  
Lingjiang KONG
Keyword(s):  
Frequency Domain ◽  
Imaging Algorithm ◽  
Forward Looking

On 2D-Imaging Algorithm for Underwater Target in Near-Field

2008 ◽  
Author(s):  
Ming-min Zhang ◽  
Guang-li Cheng ◽  
Guo-jun Xu ◽  
Cheng-yuan Liu
Keyword(s):  
Near Field ◽  
Imaging Algorithm ◽  
2D Imaging ◽  
Underwater Target

scholarly journals mmWave Measurement of RF Reflectors for 5G Green Communications

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Tao Hong ◽  
Jin Yao ◽  
Cong Liu ◽  
Fei Qi
Keyword(s):  
Near Field ◽  
Computation Time ◽  
Line Of Sight ◽  
Green Communications ◽  
Green Communication ◽  
High Quality ◽  
Field Range ◽  
Imaging Algorithm ◽  
Array Configuration ◽  
Range Migration

In recent years, with the energy consumption and environmental degradation, science and technology embarked on a path of sustainable development. In this situation, 5G green communication system has been widely used. This paper introduces the application of RF reflectors to 5G mmWave, where line-of-sight (LoS) blockage is a major hindrance for the coverage. In particular, we investigate the lab measurement of RF reflectors, which is a critical step from the theory to the practice. Furthermore, through the lab measurement, a 3D near-field range migration (RM) imaging algorithm for MIMO array configuration is proposed, and the sampling scheme is improved to save the computation time while providing high-quality images.

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