Systematic imaging method of synthetic aperture projection radiation and synthetic aperture projection radiometer

A technology of comprehensive aperture and imaging method, which is applied in the direction of using re-radiation, radio wave measurement system, radio wave reflection/re-radiation, etc., which can solve the problem of affecting comprehensive aperture imaging system, limiting spatial resolution, and high complexity of hardware cost structure. problems, to achieve the effect of broadening the practical application scenarios, reducing cost and structural complexity, and high spatial resolution

Active Publication Date: 2020-11-10
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, millimeter-wave synthetic aperture imaging radiometers with large synthetic apertures usually require many array element antennas and receivers, and the hardware cost and structural complexity of the system are high, which seriously affects the practical application of synthetic aperture imaging systems and limits Further improvement in spatial resolution

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  • Systematic imaging method of synthetic aperture projection radiation and synthetic aperture projection radiometer
  • Systematic imaging method of synthetic aperture projection radiation and synthetic aperture projection radiometer
  • Systematic imaging method of synthetic aperture projection radiation and synthetic aperture projection radiometer

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Embodiment Construction

[0048] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention but not to limit the scope of the present invention.

[0049] The invention discloses a systematic imaging method for synthetic aperture projection radiation, which includes two processes: first, the 1D projection image of a two-dimensional scene is rotated and detected by using a one-dimensional linear sparse array, and the measured 1D projection image is arranged according to the array detection angle to form Angle-Azimuth Diagram; Then, with the help of the designed cosine curve matching method, the brightness temperature image of the target scene is extracted from the Angle-Azimuth Diagram.

[0050] Such as figure 1 As shown, it is a one-dimensional sparse array layout diagram of the present invention. Preferably, the present inv...

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Abstract

The invention discloses a systematic imaging method of synthetic aperture projection radiation and a synthetic aperture projection radiometer. The method of the invention uses a one-dimensional linear sparse array as the detection scanning array of the radiometer, which is fixed on a circular scanning platform and scanned at a fixed step angle. The target scene is rotated and scanned to realize the rotation detection of the 1D projection image of the two-dimensional scene; then, the measured 1D projection image is arranged according to the array detection angle to form an angle-orientation map; The brightness temperature image of the target scene is presented in the figure. The synthetic aperture projection radiometer can realize the method of the invention. The invention realizes high-precision two-dimensional synthetic aperture imaging with a very small number of antenna elements, effectively reduces the cost and structural complexity of the synthetic aperture radiometer system, and greatly broadens the practical application scenarios of the synthetic aperture radiometer.

Description

technical field [0001] The invention relates to a systematic imaging method of synthetic aperture projection radiation and a synthetic aperture projection radiometer, belonging to the technical field of millimeter wave near-field imaging. Background technique [0002] Millimeter-wave Synthetic Aperture Imaging Radiometer (SAIR) is a detector capable of high-resolution observations in different fields. Through aperture synthesis technology, SAIR can use small-aperture antennas to form large-aperture synthetic antennas to achieve high-resolution observations. The visibility function (cross-correlation function) of the scene is measured through the complex correlation operation between array elements, and the high temperature distribution image of the target scene is inverted. Compared with the traditional real-aperture imaging technology, the comprehensive aperture imaging technology has higher spatial resolution and better real-time performance, and can realize high-resoluti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90G01S7/03
CPCG01S7/03G01S13/90G01N22/00
Inventor 陈建飞陈晓红张胜
Owner NANJING UNIV OF POSTS & TELECOMM
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