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Sparse recovery STAP ((space-time adaptive processing) method and system thereof under array error

A sparse recovery and array error technology, applied to radio wave measurement systems, instruments, etc., can solve problems such as performance degradation, achieve the effects of improving performance degradation, improving clutter suppression and target detection capabilities

Active Publication Date: 2017-01-11
SHENZHEN UNIV
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Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a sparse recovery STAP method and system thereof under array errors, aiming to solve the problem of performance degradation caused by the existence of array errors in the prior art

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  • Sparse recovery STAP ((space-time adaptive processing) method and system thereof under array error
  • Sparse recovery STAP ((space-time adaptive processing) method and system thereof under array error
  • Sparse recovery STAP ((space-time adaptive processing) method and system thereof under array error

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[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] The technical solution provided by the present invention adopts the alternate iterative algorithm based on OMP and least squares to realize the joint estimation of the clutter angle-Doppler image and the array amplitude and phase error, and then designs an adaptive space-time filter to perform clutter wave suppression. The technical solution provided by the invention can greatly improve the impact of performance degradation caused by array amplitude and phase errors, thereby further improving the ability of radar system clutter suppression and target detection.

[0029] Assume that a pulse-...

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Abstract

The invention provides a sparse recovery STAP (space-time adaptive processing) method under array error. The method comprises a joint estimation step in which joint estimation is carried out on a clutter angle-Doppler image and array amplitude and phase error based on OMP (orthogonal matching pursuit) and an iterative least square algorithm, and a filter design step in which an adaptive space-time filter is designed according to the estimated clutter angle-Doppler image and the estimated array amplitude and phase error for clutter suppression. The invention also provides a sparse recovery STAP system under the array error. The technical scheme provided by the invention can improve the influences of dropped performance caused by the array amplitude and phase error to a large degree, and the radar system clutter suppression and target detection ability can be further improved.

Description

technical field [0001] The invention relates to the field of radar signal processing, in particular to a sparse recovery STAP method and system thereof under array error. Background technique [0002] Space-time adaptive processing (STAP) is a key technology to improve the performance of airborne radar to detect moving targets, but this technology faces the problem of limited training samples of filters, and the problem is in the non-uniform clutter The environment is more prominent. In the past ten years, the technology has made certain developments, such as the proposed reduced-dimension STAP method, reduced-rank STAP method, model-based STAP method, knowledge-based (knowledge-aided) STAP method and so on. [0003] With the development of compressed sensing (CS) theory, the sparse restoration STAP method based on the premise that the clutter space-time power spectrum satisfies sparsity has been developed. This method is able to show efficient performance with few sample...

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Application Information

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IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 阳召成朱轶昂黄建军
Owner SHENZHEN UNIV