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A synthetic aperture radiometer antenna array arrangement method with optimal image signal-to-noise ratio

An antenna array and synthetic aperture technology, which is applied in the directions of antenna array, antenna, design optimization/simulation, etc., can solve the problems of low signal-to-noise ratio of inversion images, unfavorable image processing target detection, etc. Detection and imaging, the effect of improving the signal-to-noise ratio of inversion images

Active Publication Date: 2020-08-18
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a synthetic aperture radiometer antenna array arrangement method with an optimal image signal-to-noise ratio, thereby solving the problem of low signal-to-noise ratio of the inversion image in the prior art. Technical problems of object detection that are not conducive to subsequent image processing

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  • A synthetic aperture radiometer antenna array arrangement method with optimal image signal-to-noise ratio
  • A synthetic aperture radiometer antenna array arrangement method with optimal image signal-to-noise ratio
  • A synthetic aperture radiometer antenna array arrangement method with optimal image signal-to-noise ratio

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Embodiment 1

[0088] In Embodiment 1 of the present invention, the formation conditions of system design are as follows:

[0089] (1) Physical constraints: the layout space is limited to a rectangular area of ​​2m×0.6m(X*Y), such as figure 2 As shown, the antenna cannot be installed in the shaded area, and the total number of array elements is 60;

[0090] (2) Array configuration: rectangular grid sampling, combined array (consisting of 3 sub-arrays), the minimum distance between array elements is 39mm; according to the array arrangement conditions, the antenna elements are distributed in three rectangular areas, such as image 3 shown. In areas 1, 2, and 3, the maximum number of antenna units allowed to be placed is 225, 50, and 50 respectively;

[0091] (3) Reference baseline coverage: such as Figure 4 As shown in the middle blue area, its range is ±0.82m×±0.55m, and the number of sampling points is 1247; in addition, the baseline coverage including the red area indicates the baselin...

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Abstract

The invention discloses a synthetic aperture radiometer antenna array configuration method with an optimal image signal-to-noise ratio, comprising the following steps: building a target function basedon a sampling cavity position and redundant baseline distribution according to action relation of sparse configuration of a synthetic aperture radiometer antenna array on an inversed image signal-to-noise ratio; according to physical limit and performance constraint, building a constraint function of antenna array configuration; combining the target function with the constraint function, and building a problem model for synthetic aperture sparse antenna array optimization with the optimal image signal-to-noise ratio as a goal; and solving the problem model by utilizing an intelligent optimization algorithm, and obtaining optimal antenna array construction. The synthetic aperture radiometer antenna array optimization configuration method provided by the invention has the advantages that the obtained array configuration is better than typical array configuration in the same array element scale, the inversed image signal-to-noise ratio can be improved and target detection of follow-up image processing is facilitated.

Description

technical field [0001] The invention belongs to the technical field of microwave remote sensing and target detection, and more specifically relates to a method for arranging antenna arrays of synthetic aperture radiometers with an optimal image signal-to-noise ratio. Background technique [0002] The "aperture synthesis technology" derived from radio astronomy uses sparse small-aperture antenna arrays to realize the "synthesis" of large-aperture antennas, avoiding the difficulty of making real-aperture antennas with large physical apertures in the field of microwave remote sensing and target detection. This results in a higher spatial resolution. [0003] In order to obtain better imaging performance, sparse optimization of arrays usually targets spatial resolution or sensitivity. Spatial resolution is used to measure the ability of the synthetic aperture radiometer to distinguish adjacent targets, which is generally defined by the 3dB beamwidth of the synthetic pattern of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/18G06F30/20H01Q21/00
CPCG06F30/18G06F30/20H01Q21/00
Inventor 胡飞朱冬彭晓辉胡昊
Owner HUAZHONG UNIV OF SCI & TECH
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