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A block processing method for multi-band radar ultra-wideband joint imaging of complex targets

A technology for block processing and complex targets, which is applied in the field of block processing for multi-band radar ultra-wideband joint imaging of complex targets, and can solve problems such as model order limitations

Active Publication Date: 2022-02-08
BEIHANG UNIV
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  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is: the existing multi-band ultra-wideband data fusion technology based on a parameterized model can only realize ultra-wideband data fusion for simple targets with fewer scattering centers due to the limitation of the model order, and cannot be used for Data Fusion and Joint Imaging of Complex Targets

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  • A block processing method for multi-band radar ultra-wideband joint imaging of complex targets
  • A block processing method for multi-band radar ultra-wideband joint imaging of complex targets
  • A block processing method for multi-band radar ultra-wideband joint imaging of complex targets

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Embodiment

[0061] The data used in this example is the appolo-soyuz spacecraft model simulation data obtained using the rectangular method. The model is in shape figure 2 Indicated. The simulation data is 9 to 25 GHz, the step frequency is 5MHz, the sweep is from 5 to 5 °, and the step angle is 0.015 °. Here, the Ku band data is fused to perform ultra-wideband data fusion, demonstrate the specific embodiments of the present invention.

[0062] Step 1: Two wave segments are imaged by FBP algorithm, and the target scatter center is reproduced in the image domain, such as image 3 Indicated. in image 3 (a) an image of Ku band, image 3 (b) is a K band image. It can be found that the center position of the two-band image scattering center is basically one or one.

[0063] Step 2: will image 3 The two-dimensional images shown are divided into several image sub-blocks, respectively. Take the corresponding image sub-block, such as image 3 The demo line rectangle is shown. In fact, the FBP algorithm i...

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Abstract

The invention discloses a block processing method for complex target multi-band radar ultra-wideband combined imaging. The method first uses a filter-backprojection (FBP) algorithm to image the data for each radar band separately. Then in the image domain, the image of each band of the complex target is divided into blocks, and each image sub-block is transformed into the data domain by two-dimensional fast Fourier transform (2-DFFT); in the data domain, along the fan ring (or ring) to obtain the multi-band data corresponding to each image sub-block; the multi-band data of each image sub-block is fused using the existing technology based on the parametric model, and the ultra-wideband data of the sub-block can be obtained. Fusion data. Finally, the ultra-wideband fusion data of all sub-blocks are transformed into the image domain through the FBP algorithm, and all super-resolution image sub-blocks are spliced ​​in the order of blocks to obtain a complete super-resolution image of complex targets. This method is suitable for multi-band radar joint imaging under ultra-wideband conditions.

Description

Technical field [0001] The present invention relates to the field of thunder imaging processing, and more particularly to a block processing method of a complex target multi-band radar ultra-wideband combined imaging. Background technique [0002] In actual target identification, the detection capacity of ultra-wideband radar signals has a lot of superiority, but it requires high costs, and even cannot be engineered. One way is to use the existing multi-radar to observe the target simultaneously on different bands. After the signal processing method, the multi-band observation signal is used to combine, synthesize the equivalent ultra-wideband signal, thereby increasing the distance resolution. [0003] Piou et al. Proposed a data fusion method based on parameterized model in the PIOU JEA State-Space Technique for Ultrawide-Bandwidth Coherent Processing.mit Lincoln Laborative, Technical Report Tr1054, 1999, which implements the three ideal points. Broadband data fusion and joint ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90
CPCG01S13/90G01S13/9064G01S13/9017
Inventor 许小剑原赛赛
Owner BEIHANG UNIV
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