Array radar self-adaptive interference resistance method based on beam shape-preserving

An array radar and beam shape-keeping technology, applied in the radar field, can solve problems affecting target detection performance and achieve robustness and shape-keeping effects

Active Publication Date: 2016-09-07
XIDIAN UNIV
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Problems solved by technology

However, this method is only suitable for constraints near two points, not for multi-point constraints. When the interference is outside the constraint point, it will seriously affect the detection performance of the target.

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  • Array radar self-adaptive interference resistance method based on beam shape-preserving

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Embodiment Construction

[0030] The embodiments and effects of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] refer to figure 1 , in the application scenario of the present invention, the array platform is used as the radar platform, the radar configuration is a one-dimensional equidistant linear array, the number of array elements is M, the distance d between array elements is half a wavelength, and the signal angle of arrival is θ.

[0032] refer to figure 2 , the implementation steps of the present invention are as follows:

[0033] Step 1, collect the sampling data X of the target detected by the array radar.

[0034] 1a) The array radar collects the sampling data X of the detected target in real time during the target movement process, and the data includes the target and interference signals;

[0035] 1b) Input the sampling data X into the array signal processor.

[0036] Step 2, design the optimized steering vectors o...

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Abstract

The invention discloses an array radar self-adaptive interference resistance method based on beam shape-preserving. The problem that a beam main lobe formed in the prior art is uneven and is not suitable for multi-point constraint is solved. The method comprises the steps that 1 the sampling data of an array radar detection target are acquired; 2 the steering vector of three optimized constraint points is designed; 3 a mathematical model is constructed according to the steering vector in step 2; 4 the constraint vector of the mathematical model is designed, and the self-adaptive weight vector of the mathematical model is solved according to the constraint vector; and 5 the self-adaptive weight vector is used to suppress an interference signal to acquire output data. According to the invention, linear constraint is used in a number of points of a main beam; by arranging a phase response value, target signal phase matching is realized; a detection performance is prevented from the influence of interference; by setting the main beam amplitude response is 1, the main beam can evenly cover an observation area; the target detection performance of an array radar is improved; and the method can be used for multiple-target detection.

Description

technical field [0001] The invention belongs to the technical field of radar, and further relates to an array adaptive beam forming method, which can be used for target detection. Background technique [0002] Array adaptive beamforming methods are widely used in many fields, such as radar, sonar, wireless communication, medical imaging, etc. Among them, the minimum variance distortion-free response MVDR beamformer is the most typical one. Traditional approaches to designing beamformers assume that the steering vector of the SOI of the signal of interest is known exactly. However, in practical applications, target signal contamination of training samples, insufficient number of samples, and expected signal steering vector error are the main reasons for the degradation of target detection performance. Traditional MVDR beamformers are very sensitive to these errors. Therefore, practical applications urgently need a robust adaptive beamforming method to overcome the degradat...

Claims

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Application Information

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IPC IPC(8): G01S7/36G01S7/41
CPCG01S7/36G01S7/411G01S7/418
Inventor 许京伟廖桂生冯阳王成浩兰岚
Owner XIDIAN UNIV
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