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Short-range millimeter-wave fast 3D imaging method with arbitrary linear array configuration

A 3D imaging and millimeter wave technology, applied in the field of 3D imaging, can solve the problems of long imaging time, high algorithm complexity, limiting the freedom of system design and configuration optimization, etc., to achieve accurate and fast 3D imaging, short imaging time, The effect of low computational complexity

Active Publication Date: 2020-01-14
NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
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Problems solved by technology

[0003] At present, the research on "MIMO-plane scanning" mainly focuses on the system design and the optimization of the array configuration. As for the imaging algorithm, the Back Projection Algorithm (BPA) is generally used at present. Although this method can obtain good imaging Accuracy, but its algorithm complexity is high, imaging takes a long time, it is difficult to meet the application requirements
In addition, several existing imaging methods, including the back-projection algorithm, all have certain restrictions on the array configuration, and cannot achieve fast imaging of any array configuration, which limits the system design and configuration to a certain extent. degrees of freedom for type optimization

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  • Short-range millimeter-wave fast 3D imaging method with arbitrary linear array configuration

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[0050] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0051] The technical solutions provided by the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0052] as attached figure 1 As shown, the embodiment of the present invention provides a short-range millimeter-wave fast three-dimensional imaging method with any linear array configuration, the me...

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Abstract

The invention discloses a short-range millimeter wave fast three-dimensional imaging method with an arbitrary linear array configuration. The method comprises the following steps of constructing an echo signal and an imaging formula; performing NUFFT or FFT on a coordinate dimension in the echo signal; transforming the spectral domain data in the four-dimensional space into three dimensions by dimension reduction; using NUFFT for imaging. The short-range millimeter wave fast three-dimensional imaging method with an arbitrary linear array configuration provided by the invention, directed to a short-range millimeter-wave three-dimensional imaging system of "MIMO-plane scan" mode, can achieve accurate and fast three-dimensional imaging of arbitrary MIMO line array configuration with short required time-consuming for imaging and low computational complexity by adopting a "fast Gaussian mesh" based NUFFT technology.

Description

technical field [0001] The invention relates to the technical field of three-dimensional imaging, in particular to a short-range millimeter-wave fast three-dimensional imaging method with an arbitrary linear array configuration. Background technique [0002] The short-range active millimeter-wave synthetic aperture imaging technology can obtain 3D images with high dynamic range and high resolution of the target, and has a wide range of applications in the fields of dangerous goods detection, nondestructive testing, security imaging, and ground penetrating radar. Among them, the short-range millimeter-wave 3D imaging system using "Multi-Input-Multi-Output (MIMO) linear array + one-dimensional plane scanning" (referred to as "MIMO-plane scanning") is emerging in recent years and has More advantageous millimeter wave imaging system. Compared with the classic "Single-Input-Single-Output (SISO) line array + one-dimensional plane scanning" (referred to as "SISO-plane scanning") s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/89G01S7/41
Inventor 范波常强姜志杰姚雯周炜恩张俊
Owner NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
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