A High-Precision Frequency-Domain Imaging Algorithm of Millimeter-wave Sparse Planar Array

被引：0
|
作者：
Meng X.-X. [1 ]
Liu T.-R. [1 ]
Da M. [1 ]
Liu Z.-X. [1 ]
机构：
[1] Brainware Terahertz Information Technology Company Limited, Hefei, 230088, Anhui
来源：
Tien Tzu Hsueh Pao/Acta Electronica Sinica | 2020年 / 48卷 / 08期
关键词：
FFT-based algorithm; Handheld human body security inspection; Noise robustness; Sparse planner array; The modified RMA algorithm;
D O I：
10.3969/j.issn.0372-2112.2020.08.004
中图分类号：
学科分类号：
摘要：
Sparse cross array that operating in the 90~94GHz frequency band was designed for the handheld millimeter-wave human body security inspection.The time-domain correlation algorithm and the modified range migration algorithm (RMA)were chosen as image reconstruction methods.Due to the existence of spherical wave expansion approximation and complex interpolation processes in the deriving of the modified RMA algorithm, a high-precision FFT-based imaging algorithm without spherical wave expansion and complex interpolations was proposed.The electromagnetic simulation software was used to build target model obtaining raw echo data, the resolution test and noise robustness verification experiments were carried out.The azimuth resolution can achieve 5mm, which meets the system design requirements, and verifies the effectiveness of the proposed algorithm.The computational efficiency of the proposed algorithm is better than that of the time-domain correlation algorithm and the noise robustness is better than the modified RMA algorithm.It can be concluded that the proposed algorithm is a better choice in real-time imaging scenarios of the handheld millimeter-wave human body security inspection. © 2020, Chinese Institute of Electronics. All right reserved.
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页码：1479 / 1485
页数：6
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