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A Cyclic Joint Adaptive Beamforming Method Based on Subarray Partitioning

An adaptive beam and sub-array division technology, applied in the field of radar, achieves the effect of fast acquisition, favorable filtering, and reduced computational complexity

Inactive Publication Date: 2016-02-10
XIDIAN UNIV
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  • Summary
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  • Application Information

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Problems solved by technology

This method can effectively reduce the demand for independent and identically distributed samples, reduce the computational complexity, and at the same time effectively suppress interference, thereby solving the beamforming problem of large-scale radar antenna arrays

Method used

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  • A Cyclic Joint Adaptive Beamforming Method Based on Subarray Partitioning
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  • A Cyclic Joint Adaptive Beamforming Method Based on Subarray Partitioning

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings.

[0041] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0042] Step 1, sub-array division.

[0043]For multiple radar antenna array elements, p array elements are selected as a sub-array according to the average component order of the number of array elements N, forming M=N / p sub-arrays, and the outer array composed of M sub-arrays and An antenna array composed of nested inner arrays composed of p array elements, where N represents the number of radar antenna array elements, p represents the number of array elements contained in the sub-array of the radar antenna array, and M represents the number of sub-arrays of the radar antenna array number.

[0044] Step 2, get the steering vector.

[0045] Using the steering vector formula, the radar target signal steering vector, the outer antenna array steering vector and the ...

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Abstract

The invention discloses a sub-array division based circulation combined adaptive beam forming method and solves the problems of the large independent identically distributed sample demanded quantity, the high calculation complexity and the poor filter effect during a large amount of interference during large-scale radar antenna array beam forming. The method is implemented through the steps of (1) sub-array division; (2) steering vector obtaining; (3) direct product decomposition of steering vectors; (4) cost function establishing; (5) weight vector solving; (6) beam forming. Compared with the beam forming method in the prior art, the forming method has the advantages of being good in inhibitory effect on interference, small in required sample number and fast in iteration convergence. The forming method can be applied to radar beam forming in the situation that the radar antenna array scale is large, the number of training samples is small and the amount of interference is large.

Description

technical field [0001] The invention belongs to the technical field of radar, and further relates to a cyclic joint adaptive beamforming method based on subarray division in the technical field of array signal processing. The invention can be used to solve the problem of beam forming under the condition of large scale of radar antenna array, few training samples and many interferences. Background technique [0002] In the past 50 years of development, array signal processing technology has been widely used in many military and national economic fields such as radar, communication, navigation, sonar, voice processing, and geological exploration. Especially in recent years, with the rapid development of wireless digital communication technology, the application of array signal processing technology in mobile communication system has aroused people's extensive attention and research interest, which further accelerated the development of this technology. Adaptive beamforming, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/36
CPCG01S7/023G01S7/36
Inventor 冯大政虞泓波赵海霞
Owner XIDIAN UNIV