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Phased array close-distance digital imaging method

A digital imaging, close-range technology, applied in the direction of reflection/re-radiation of radio waves, use of re-radiation, measurement devices, etc., can solve problems such as lack of imaging recognition ability

Active Publication Date: 2018-12-21
SUZHOU WEIMO ELECTRONIC INFORMATION TECH CO LTD
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Problems solved by technology

This method is only a detection technology and does not have the ability of imaging recognition

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  • Phased array close-distance digital imaging method

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Embodiment Construction

[0108] Such as figure 1 As shown, when a certain rule is used to perform complex weighting processing on the signals of each unit of the antenna array, the separation of different target echo signals can be achieved, thereby forming a clear and recognizable image at the corresponding position behind the antenna array. In this imaging detection mechanism, the weighted processing of the echo signal includes two parts: antenna unit phase-shift weighting and propagation weighting, such as figure 2 As shown, and the phase shift characteristics of the antenna elements are different from those of the traditional digital beamforming (DBF) with the same phase difference.

[0109] The phased array close-range digital imaging method of the present invention is mainly based on the equivalent lens imaging principle, including:

[0110] Step 1. Determine the detection airspace. The detection airspace is often determined by the system usage requirements, including the detection of the far ...

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Abstract

The invention discloses a phased array close-distance digital imaging method. The method comprises the following steps of: Step 1, determining detection airspace; Step 2, determining spatial coordinates of each antenna unit; Step 3, processing and detecting signals received by each antenna unit; Step 4, determining a detection area of rough imaging detection; Step 5, splitting the detection area,and calculating the coordinates of each grid node; Step 6, determining phase shift amounts of each antenna unit; Step 7, determining radio propagation weighting coefficients from each antenna unit toa detection area splitting grid node; Step 8, calculating an image field of the detection area; Step 9, detecting a target according to a field value distribution condition of an imaging area; and Step 10, measuring the coordinates of the target. The phased array close-distance digital imaging method provided by the invention provides an integrated solution for the close-distance phased array detection and imaging, provides high-precision target imaging while achieving the target detection, and fully utilizes limited hardware conditions to realize high performance integrated target detection and imaging identification.

Description

technical field [0001] The invention relates to the field of radio positioning and detection, in particular to a phased array short-distance digital imaging method. Background technique [0002] In the field of radio positioning and detection, target imaging detection technologies in a broad sense include synthetic aperture imaging (SAR), inverse synthetic aperture imaging (ISAR) and one-dimensional range profile (HRRP), etc. These technologies can identify certain shapes and sizes of targets information. In terms of short-distance detection, digital beamforming (DBF) can form suitable detection multi-beams according to needs, and can realize simultaneous detection of multiple targets. These technologies are widely used in real life. [0003] The first is synthetic aperture imaging. In this method, the detection equipment is usually installed on aircraft and satellites, and uses its own track information and target echo signals to measure distance and synthesize two-dimens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/89
CPCG01S13/89
Inventor 张继龙
Owner SUZHOU WEIMO ELECTRONIC INFORMATION TECH CO LTD
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