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A Method of Bistatic Radar Imaging Based on Tomography

A bistatic radar and imaging method technology, applied in the field of radar, can solve the problem of low resolution, achieve the effect of improving imaging resolution, reducing bandwidth requirements, and enriching target scattering information

Active Publication Date: 2021-10-08
XIDIAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

Combining bistatic radar and SAR / ISAR imaging has certain advantages, but bistatic SAR / ISAR imaging still has many disadvantages
For example, the bistatic ISAR imaging method has low resolution in small-angle imaging and large-angle cross-range unit imaging

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  • A Method of Bistatic Radar Imaging Based on Tomography
  • A Method of Bistatic Radar Imaging Based on Tomography
  • A Method of Bistatic Radar Imaging Based on Tomography

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Embodiment Construction

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0055] Currently, due to the limited spectrum resources and the complexity of wideband signal processing, narrowband radar imaging has a significant demand. Computer tomography based on Radon transform and projective slice theorem has a wide range of applications in the medical field, and many scholars have introduced the principle of tomography into the field of radar imaging. Radar tomography technology can realize narrow-band signal imaging well. Compared w...

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Abstract

The invention belongs to the field of radar technology, and discloses a bistatic radar imaging method based on tomographic principles, including: establishing a bistatic radar tomographic imaging system model, obtaining bistatic radar echo signals, performing delinear frequency modulation, and transforming to frequency domain, deskewing the signal, transforming the obtained baseband echo signal into the wavenumber domain, and obtaining the image reconstruction model of the filtered back projection algorithm based on the principle of tomography, and establishing the wavenumber domain echo of the bistatic radar through the principle of tomography The relationship between the wave signal and the target scattering intensity function, and image reconstruction is carried out to obtain the bistatic radar tomography reconstruction image; the technical solution of the present invention reduces the bandwidth requirement of radar imaging by combining the tomographic imaging principle and the bistatic radar As a result, the narrow-band radar can also obtain better resolution, which is especially suitable for imaging in the case of large rotation angles.

Description

technical field [0001] The invention belongs to the field of radar technology, and in particular relates to a bistatic radar imaging method based on tomographic principles, which is suitable for improving the imaging resolution of bistatic radar under the condition of large rotation angle by increasing the accumulation angle. Background technique [0002] Radar imaging is one of the most important tasks of modern radars. At present, SAR imaging and ISAR imaging are the most widely used in the field of radar imaging. These two imaging methods rely on large bandwidth to achieve high resolution in distance, and achieve high resolution in azimuth by synthesizing large array apertures. Bistatic SAR and ISAR imaging are mostly studied at present. [0003] Bistatic radar has many institutional advantages. Bistatic radar can obtain richer target scattering information and a longer detection distance. In addition, in the actual battlefield environment, the separation of the transmit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90G01S7/41
CPCG01S7/41G01S13/90G01S13/9058
Inventor 李军亢海龙卫雨松亢龙欢张玉洪常峻青薛玉喜
Owner XIDIAN UNIV
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