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Imaging method of arc array mimo-sar

A MIMO-SAR and arc array technology, which is applied in the field of microwave imaging technology for earth observation, can solve the problems of inapplicable arc array, imaging echo data imaging processing, etc.

Active Publication Date: 2016-08-24
INNER MONGOLIA UNIV OF TECH
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Problems solved by technology

[0019] The problem to be solved by the present invention is that the existing imaging processing method is mainly aimed at linear array MIMO-SAR imaging echo data, which cannot be applied to imaging processing of arc array imaging echo data, and an arc array MIMO-SAR imaging processing method is provided. imaging method

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  • Imaging method of arc array mimo-sar
  • Imaging method of arc array mimo-sar
  • Imaging method of arc array mimo-sar

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Embodiment Construction

[0104] The present invention will be described in detail below in conjunction with the accompanying drawings. The step numbers shown in this document have a sequence only when there is an obvious logical connection between the upper and lower steps, otherwise they do not constitute the sequence of execution of the steps.

[0105] Such as image 3 As shown, it is an airborne arc array antenna MIMO-SAR imaging system suitable for application according to an imaging method according to an embodiment of the present invention. The imaging system mainly includes an arc array antenna 11, a microwave switch network 12, and a MIMO-SAR transceiver. Module 13, data acquisition module 14, imaging processor 15, image display module 16 and system controller 17; image 3 Shown is the geometrical schematic diagram of the airborne arc array MIMO-SAR imaging that can apply the imaging method of the present invention, by installing the airborne arc array MIMO-SAR imaging system 10 on the belly ...

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Abstract

The invention discloses an imaging method of an arc array MIMO-SAR. The imaging method comprises the steps of S1, converting the imaging echo signal of the arc array MIMO-SAR into a distance frequency domain signal according to the signal receiving-transmitting working system of the arc array MIMO-SAR, S2, performing an array to angle domain zero filling operation on the distance frequency domain signal and generating a zero filled distance frequency domain-angle time frequency signal, S3, performing arc array to Fourier transform o the distance frequency domain-angle time frequency signal to obtain a two-dimensional frequency domain signal, and S4, performing imaging processing on the two-dimensional frequency domain signal to obtain a distance-angle two-dimensional image of an observation region. The imaging method of the arc array MIMO-SAR is capable of performing high-precision imaging processing on the imaging echo data of the arc array based on frequency domain integral, and has excellent adaptability; the imaging method is capable of obtaining the two-dimensional image of the whole observation region by imaging objects at different radiuses in the observation regions.

Description

technical field [0001] The present invention relates to the field of microwave imaging technology for earth observation, in particular to an imaging method for arc array MIMO-SAR Background technique [0002] Traditional visual, optical or infrared measures are greatly affected by factors such as terrain, weather and day and night, and do not have all-weather and all-weather working capabilities. Arc array MIMO-SAR (Multi-InputMulti-Output Synthetic Aperture Radar , multiple-input multiple-output synthetic aperture radar, referred to as MIMO-SAR, that is, the MIMO-SAR of the present invention) imaging can not only penetrate smoke, fog, clouds and floating dust, etc., and is not affected by weather and climate, but also can detect Real-time high-resolution imaging of the area can also provide real ground information for aircraft landing, reconnaissance, search and rescue, and take-off, enhancing the aircraft's navigation and transportation rescue capabilities; in addition, us...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90
CPCG01S13/9005G01S13/9011G01S13/9004
Inventor 黄平平谭维贤洪文
Owner INNER MONGOLIA UNIV OF TECH
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