A two-dimensional beam optimization method for conformal arrays based on convex optimization theory

A technology of beam optimization and conformal array, applied in the direction of sound wave reradiation, radio wave measurement system, instrument, etc., can solve the problems of high side lobe level and difficult control of beam stability, and achieve high robustness and good beam pointing Sexuality, the effect of high array gain

Active Publication Date: 2022-07-22
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a conformal array two-dimensional beam optimization method based on convex optimization theory. control issues while improving beamforming array gain and robustness

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  • A two-dimensional beam optimization method for conformal arrays based on convex optimization theory
  • A two-dimensional beam optimization method for conformal arrays based on convex optimization theory
  • A two-dimensional beam optimization method for conformal arrays based on convex optimization theory

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[0074] The technical solutions and effects of the present invention will be described in further detail below with reference to the accompanying drawings.

[0075] A two-dimensional beam optimization method for conformal arrays based on convex optimization theory. The method is based on the two-dimensional beam optimization method for conformal arrays based on convex optimization theory. On the basis, the constraint on the side lobe of the beam response formed by the two-dimensional beam is added, and it is expressed as a convex optimization second-order cone constraint problem. The interior point method is used to solve this convex optimization problem, and the optimal weighting vector under the constraints is obtained. The optimal solution can be obtained to obtain a two-dimensional beam response map of the conformal array whose side lobes meet the requirements. Specifically include the following steps:

[0076] (1) Modeling the array flow pattern in the conformal array sca...

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Abstract

The invention discloses a conformal array two-dimensional beam optimization method based on convex optimization theory, and belongs to the technical field of underwater acoustic array signal processing. The method includes the following steps: dividing the conformal array scanning space into the main lobe area and the side lobe area; initializing the half main lobe width, and setting the narrowest main lobe width under the desired side lobe level by iterative solution; optimizing the beamforming The problem is expressed in the form of a convex optimization second-order cone constraint, and the optimal solution of the weighted vector is obtained by using the interior point method, thereby obtaining a two-dimensional beam response map with uniform low sidelobes. The two-dimensional beam pattern obtained by the invention has lower side lobe level, and the side lobes are uniform side lobes, and have better beam directivity. The constraint equation designed on the basis of the MVDR method of the present invention enables two-dimensional beamforming to obtain higher array gain compared to the traditional method. In addition, the constraint on the norm of the weighting vector in the present invention makes 2D beamforming more robust than traditional methods.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic array signal processing, in particular to a conformal array two-dimensional beam optimization method based on convex optimization theory. Background technique [0002] When active sonar is used for the detection of surface targets such as ships, these surface targets are not at the same height as the sonar platform. The sonar needs to search in both the horizontal direction and the pitch direction. The conformal array sonar can realize all-round scanning in space. For the purpose of reducing the computational complexity of the algorithm and the complexity of the sonar equipment, the traditional processing method converts the conformal array into a one-dimensional array for one-dimensional beamforming, that is, the array elements in the pitch direction are connected in series. The processing is equivalent to an array element, and each equivalent array element has a certain directivity i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/539G01S15/00
CPCG01S7/539G01S15/006
Inventor 梁浩前王晓庆陈卫东
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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