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A single-frequency radar imaging method for spinning targets

A radar imaging and target technology, which is applied in the direction of using re-radiation, reflection/re-radiation of radio waves, measurement devices, etc., to achieve strong practical value and solve imaging problems.

Active Publication Date: 2018-01-16
BEIJING INST OF ENVIRONMENTAL FEATURES
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Problems solved by technology

[0005] The purpose of the present invention is to propose a single-frequency radar imaging method for spinning targets, which can not only solve the imaging problem of wide-angle continuous wave radar echoes, but also solve the imaging problem of spinning targets well. It has strong practical value in the detection and identification of

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  • A single-frequency radar imaging method for spinning targets
  • A single-frequency radar imaging method for spinning targets
  • A single-frequency radar imaging method for spinning targets

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[0038] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The description of the exemplary embodiments is for the purpose of illustration only, and in no way limits the invention and its application or usage.

[0039] Although the present invention has been described with reference to exemplary embodiments, it should be understood that the present invention is not limited to the specific embodiments described and shown in detail herein, and that it is possible for those skilled in the art to do so without departing from the scope defined by the claims. Personnel may make various changes to the exemplary embodiments described.

[0040] Aiming at the problem that imaging algorithms such as range Doppler and filtered back projection cannot be used for the radar echo of the continuous wave radar echo and the radar echo of the single-frequency spinning target, the invention provides a single-frequency radar ...

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Abstract

The invention discloses a single-frequency radar imaging method for a spinning target. The method comprises steps as follows: obtained radar echoes of a target in all azimuth angles are divided into N sub-apertures, and Fourier transform is performed on the radar echoes in each sub-aperture, so that lateral distribution of scattering intensity in each sub-aperture is obtained; RADON inverse transformation is performed on the lateral distribution of the scattering intensity in the N obtained sub-apertures, and a first image of the target is rebuilt; a second image of the target is rebuilt with the CLEAN algorithm according to the rebuilt first image of the target. According to the method, the imaging problem of wide-angle continuous wave radar echoes can be solved, and the imaging problem of the spinning target can also be well solved. The method has the higher practical value in detection and identification of the radar target.

Description

technical field [0001] The invention relates to the field of radar target imaging, in particular to a single-frequency radar imaging method for spinning targets. Background technique [0002] The technical background related to the present invention will be described below, but these descriptions do not necessarily constitute the prior art of the present invention. [0003] In two-dimensional radar imaging, imaging algorithms such as range Doppler and filtered back projection are usually used to complete the reconstruction of the two-dimensional image of the target. However, imaging algorithms such as range Doppler and filtered inverse projection not only require the azimuth direction of the radar echo to contain certain synthetic aperture angle data, but also require the range direction of the radar echo to contain data of a certain bandwidth. However, sometimes the collected radar echo data does not meet the above requirements, such as continuous wave radar echo data and ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/89
CPCG01S13/89
Inventor 李胜闫华崔闪
Owner BEIJING INST OF ENVIRONMENTAL FEATURES
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