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Radar antenna array steady beam forming method based on sparse constraint

A radar antenna, sparse constraint technology, applied in the field of radar array signal processing, can solve problems such as performance degradation

Inactive Publication Date: 2017-02-22
XIDIAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the more effective robust beamforming method is mainly the diagonal loading technology, which has a good effect on the mismatch of the desired steering vector and the small number of samples, etc., but when the received signal contains the desired signal, it will lead to performance degradation

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  • Radar antenna array steady beam forming method based on sparse constraint
  • Radar antenna array steady beam forming method based on sparse constraint
  • Radar antenna array steady beam forming method based on sparse constraint

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Embodiment Construction

[0059] 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.

[0060] Before carrying out the detailed description of the technical solution of the present invention, the following theoretical analysis is supplemented earlier:

[0061] Assuming an N-element uniform linear array, there are P far-field narrow-band interferences, and the received signal at time k can be obtained as x(k). According to the minimum variance and no distortion criterion, and through matrix inversion operation, the output of the radar antenna array...

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Abstract

The invention belongs to the field of radar array signal processing and discloses a radar antenna array steady beam forming method based on sparse constraint. The method includes the steps that L receiving signals of a radar antenna array are acquired, and a covariance matrix estimated value (please see the formula in the specification) of the receiving signals is obtained through calculation according to the L receiving signals; an assumed target signal guide vector is s, and a target signal guide vector estimated value (please see the formula in the specification) is obtained according to the covariance matrix estimated value (please see the formula in the specification) of the receiving signals and the assumed target signal guide vector s; a complete interference and signal subspace is determined according to the covariance matrix estimated value (please see the formula in the specification) of the receiving signals and the target signal guide vector estimated value (please see the formula in the specification); an optimal adaptive beam forming weight vector of a radar antenna array output end is established according to the complete interference and signal subspace.

Description

technical field [0001] The invention belongs to the field of radar array signal processing, in particular to a method for forming robust beams of radar antenna arrays based on sparse constraints. Background technique [0002] In radar array signal processing, beamforming technology is mainly used in radar, voice array signal, wireless communication and other fields. The main content of beamforming is to adaptively suppress strong interference in other directions while keeping the gain in the desired signal direction constant. The traditional beamforming method needs to be based on the known steering vector of the desired signal and the accurate estimation of the covariance matrix of the received signal. However, in practice, the steering vector of the desired signal does not match, and the received signal contains strong desired signal and received signal Inaccurate covariance matrix estimation, etc., will lead to the degradation of beamforming performance. Therefore, the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/34G01S7/28G01S7/35
CPCG01S7/34G01S7/2813G01S7/352
Inventor 冯大政杨凡崔思玉
Owner XIDIAN UNIV
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