Fast Imaging Algorithm for Dielectric Target Based on Spatial Three Dimensional Non-Uniform SISO Array Radar

被引：0
|
作者：
Deng G.-L. [1 ,2 ]
Deng B. [1 ]
Chen X. [1 ]
Zeng Y. [1 ]
机构：
[1] College of Electronic Science and Technology, National University of Defense Technology, Hunan, Changsha
[2] Unit 78156 of the PLA, Chongqing
来源：
Tien Tzu Hsueh Pao/Acta Electronica Sinica | 2024年 / 52卷 / 01期
基金：
中国国家自然科学基金;
关键词：
3D non-uniform SISO array; fast imaging algorithm; half space medium target; virtual uniform array; wavenumber domain;
D O I：
10.12263/DZXB.20221331
中图分类号：
学科分类号：
摘要：
In recent years, with the rapid development of high-precision orientation system, the imaging array based on handheld millimeter wave radar has attracted extensive attention in the fields involving internal structure imaging such as nondestructive testing and medical imaging. Different from the common two-dimensional (2D) planar single-input-single-output (SISO) array, the elements of the handheld millimeter wave radar imaging array are usually unevenly distributed in three-dimensional (3D) space, which means that the existing fast imaging algorithms for dielectric targets are inapplicable. In this paper, a fast imaging algorithm for 3D non-uniform SISO array is proposed. The proposed algorithm expands each element of the 3D spatial random array into a virtual uniform array, and then transforms the data of all virtual arrays into wavenumber domain and coherently accumulates them, and finally performs fast imaging through 3D inverse fast Fourier transform (IFFT). Under the imaging parameters given in this paper, numerical simulation and experimental measurements show that the proposed algorithm can achieve the same imaging quality with reducing the imaging time by more than 94% compared with the improved backward projection (IBP) algorithm. © 2024 Chinese Institute of Electronics. All rights reserved.
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收藏
页码：274 / 287
页数：13
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