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High-precision multi-band fusion method based on decoupling atom norm minimization

A fusion method and minimization technology, applied in the direction of reflection/re-radiation of radio waves, use of re-radiation, measurement devices, etc., can solve problems such as easy failure, achieve easy methods, save manpower, material and financial resources, and improve radar resolution. Effect

Active Publication Date: 2022-01-28
AEROSPACE INFORMATION RES INST CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, existing multi-band fusion methods based on sparse reconstruction are prone to failure under grid mismatch conditions.

Method used

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  • High-precision multi-band fusion method based on decoupling atom norm minimization
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  • High-precision multi-band fusion method based on decoupling atom norm minimization

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Embodiment Construction

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0032] A high-precision multi-band fusion method based on decoupling atomic norm minimization of the present invention comprises the following steps:

[0033] Step 1: receiving radar signals of each sub-band within each sub-pulse time period;

[0034] like figure 1 As shown, assuming that the frequency domain has a total of N zd Each subband corresponds to a radar system, the subband distributed in the lowest frequency band is called subband 1, ...

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Abstract

The invention relates to a high-precision multi-band fusion method based on decoupling atom norm minimization. The high-precision multi-band fusion method comprises the following steps: 1 receiving each sub-band radar signal in each sub-pulse time period; 2 carrying out motion compensation on the sub-band radar signals in each pulse time period; 3 representing the model of each sub-band radar signal; 4 performing MRA-based sub-band signal incoherent term estimation and compensation on each pulse echo signal after motion compensation is completed; and 5 estimating a large-bandwidth signal from the plurality of sub-band signals based on decoupling atom norm minimization and imaging.

Description

technical field [0001] The invention relates to the field of radar imaging, in particular to a high-precision multi-band fusion method based on the minimization of decoupling atomic norms. Background technique [0002] Microwave radar observes the target by emitting electromagnetic waves on the target and then processing the reflected electromagnetic waves of the target, so it has the ability to work all day and all day. Compared with optical detectors, microwave radar can detect, track and identify targets in harsh environments. effect. [0003] In order to obtain finer structure information of the target, it is necessary to improve the range and azimuth resolution of the microwave radar. The range resolution can be improved by transmitting a large-bandwidth chirp signal, and the azimuth resolution can be improved by increasing the imaging accumulation angle. In order to improve the range resolution of the existing radar system under the condition of minimum hardware con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/89G01S13/87
CPCG01S13/89G01S13/87
Inventor 李王哲蒋文
Owner AEROSPACE INFORMATION RES INST CAS