Low-sidelobe and null beam forming method

A low-sidelobe, null-notching technology, applied in the field of low-sidelobe zero-notching beamforming, can solve the problems of unfavorable implementation and large amount of computation, and achieve the effects of easy hardware implementation, high suppression level, and avoiding cumbersomeness

Active Publication Date: 2019-07-23
10TH RES INST OF CETC
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Problems solved by technology

However, there is no explicit solution for the low-sidelobe zero-sinking weight vector, and its solution often requires the use of an optimization algorithm, which makes the calculation amount larger and is not conducive to the realization of

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  • Low-sidelobe and null beam forming method

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[0016] refer to figure 1 . According to the present invention, based on virtual sub-array step-by-step weighting, the actual uniform linear array is divided into two virtual uniform linear sub-arrays, and the two sub-arrays have and only one array element is shared; two virtual sub-arrays are designed for two A low sidelobe weight vector module, a zero trap weight vector module, and a low sidelobe zero trap weight vector module for generating low sidelobe weight vectors and zero trap weight vectors; the low sidelobe zero trap weight vector module uses stepwise weighting to The beam pattern is subject to null and low sidelobe constraints, and by adjusting the allocation method of virtual subarray elements and sidelobe level values, the beam widths corresponding to the weight vectors of the two virtual subarrays are equal; low sidelobe null The weight vector module convolves the low sidelobe weight vector and the zero trap weight vector obtained by the low sidelobe weight vecto...

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Abstract

The invention provides a low-sidelobe and null beam forming method. By use of the method, the design complexity of low-sidelobe and null weight vectors can be lowered, flexibility can be enhanced, andconvenience is brought to hardware implementation. According to the technical scheme, based on virtual subarray step-by-step weighting, an actual uniform linear array is divided into two virtual uniform linear subarrays, and the two subarrays share only one array element; a low-sidelobe and null weight vector module performs null constraint and low-sidelobe constraint on a beam pattern through step-by-step weighting, beam widths corresponding to the weight vectors of the two virtual subarrays are made equal by adjusting the distribution mode of array elements of the virtual subarrays and sidelobe level values, the low-sidelobe and null weight vector module performs convolution on low-sidelobe weight vectors and null weight vectors obtained by a low-sidelobe weight vector module and a nullweight vector module respectively, and the low-sidelobe and null weight vectors are obtained; and then the optimal weight vector is selected according to the principle that a beam main lobe is the narrowest when the maximum sidelobe level is smaller than a threshold, and low-sidelobe and null beam formation is completed.

Description

technical field [0001] The present invention relates to an array signal processing widely used in radar, communication, sonar, earthquake, and astronomy, and in particular to a low-sidelobe zero-sinking beamforming method based on virtual sub-array step-by-step weighting for uniform linear arrays . Background technique [0002] Array signal processing is an important branch of signal processing. Array signal processing is a signal processing technology that applies filtering theory to the airspace, and uses multiple array elements to filter the signal in space by the receiving time difference of the far-field signal. Array signal processing refers to the processing of signals induced by array elements. Array signal processing can be divided into two branches: direction of arrival (DOA) estimation and spatial filtering. The main issues of array signal processing include: spatial spectrum estimation for super-resolution estimation of the distribution of the direction of arr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/02G01S7/36G01S7/40
CPCG01S7/023G01S7/36G01S7/40Y02D30/70
Inventor 刘亮朱胜利王亚涛乔文昇王立黄秀琼
Owner 10TH RES INST OF CETC
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