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Iterative self-adaptive high-resolution imaging method of distributed array radar

An iterative self-adaptive, array radar technology, applied in the direction of radio wave reflection/re-radiation, using re-radiation, measurement devices, etc. Problems such as strong configuration dependence, to achieve the effect of reducing dependence

Inactive Publication Date: 2019-10-18
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

The distributed radar imaging method can be based on the MUSIC method, but the number of target scattering points in the scene needs to be estimated by the Gale disk criterion, which is sensitive to the number of targets and the distribution of radar configurations
[0004] In summary, the above method can be used in the application of distributed array radar imaging, but the above method is highly dependent on the spatial configuration of array radar, and the engineering application is difficult

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  • Iterative self-adaptive high-resolution imaging method of distributed array radar
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  • Iterative self-adaptive high-resolution imaging method of distributed array radar

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Embodiment Construction

[0051] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0052] see figure 1 , the present invention proposes a distributed array radar iterative adaptive high-resolution imaging method, which is realized by the following steps:

[0053] S1. According to the transmitted signal and the echo signal, a filter factor is constructed to obtain the frequency domain echo signal and spatial spectrum distribution.

[0054]In this embodiment, the geometric relationship of the distributed radar imaging system is as follows figure 2 As shown in , the layout of the five target points in the original imaging scene is as follows image 3 shown. Table 1 and Table 2 below are radar system parameters and comparative parameter tables respectively.

[0055]

[0056] Table 1 Distributed radar system parameter table

[0057]

[0058] Table 2 System Comparison Parameter Table

[0059] In this embodiment, two groups of pa...

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Abstract

The invention provides an iterative self-adaptive high-resolution imaging method of a distributed array radar, and belongs to the technical field of radar imaging. Aiming at the problem of configuration dependence of a traditional distributed array radar, the iterative self-adaptive high-resolution imaging method comprises the steps of firstly, deriving spatial spectrum distribution of a distributed radar array according to a space region of sparse array of the distributed array radar; secondly, constructing a distributed array radar system observation matrix according to the distributed radarspatial spectrum distribution and a system parameter; and finally, employing the iterative self-adaptive imaging processing method to achieve high-resolution imaging of the distributed array radar inorder to reduce the configuration dependence during the imaging processing process. The dependence of the distributed array radar on configuration is reduced by iterative self-adaptive convergence during the target solving process.

Description

technical field [0001] The invention belongs to the technical field of radar imaging, in particular to a distributed array radar iterative adaptive high-resolution imaging method. Background technique [0002] Radar uses target information carried in reflected electromagnetic waves to obtain radar images, and is widely used in scenarios such as disaster monitoring and target tracking. However, it is difficult for a single radar platform to obtain high-resolution images due to the limitation of its antenna aperture. Distributed array radar utilizes the spatial diversity relationship of multiple platforms to form a large observation aperture, which provides conditions for high-resolution radar imaging. The spatial distribution relationship of distributed array radar has a crucial impact on the acquisition of target observation information. [0003] In the prior art, by establishing a distributed multi-channel radar imaging observation model, the nonlinear Fourier transform m...

Claims

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Application Information

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IPC IPC(8): G01S13/89G01S7/42G01S7/41
CPCG01S7/41G01S7/42G01S13/89
Inventor 张永超徐帆云任叶涵毛德庆黄钰林裴季方张寅郭德明杨建宇
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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