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Robust implementation method of flexible array beamforming

An implementation method and beam technology, applied in the field of sonar, can solve the problems of limited formation and distortion of beam forming technology, and achieve the effects of small calculation amount, high measurement accuracy and convenient use.

Active Publication Date: 2022-06-07
NAVAL UNIV OF ENG PLA
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Problems solved by technology

[0004] The purpose of the present invention is to address the defects of the prior art, to provide a method for realizing the robustness of the flexible array beamforming, which effectively solves the problem that the beamforming technology is limited by the formation distortion

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  • Robust implementation method of flexible array beamforming
  • Robust implementation method of flexible array beamforming
  • Robust implementation method of flexible array beamforming

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[0073] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they are not intended to limit the present invention.

[0074] Array distortion is shown as figure 1 As shown in the figure, the triangle line in the figure is an ideal uniform line array, and each triangle represents an array element. Ideally, the drag line array is straight and has no distortion. However, when the towed array works in the actual marine environment, the towed array will be distorted under the influence of ocean currents, internal waves, tugboat maneuvering and other factors. At this time, the towed array is as follows: figure 1 The formation represented by the mid-arc line. Due to the distortion of the drag line array, the steering vector mismatch is caused, and the sonar detection performance is seriously degraded, and the beamforming algorithm needs t...

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Abstract

The invention provides a method for implementing robust beamforming of a flexible array, which is characterized in that it includes the following steps: segmenting the towing line array to obtain several subarrays; using adaptive beamforming technology for the first subarray close to the towing cable, Obtain the beam output of the first sub-array; the subsequent sub-arrays are the same as the first sub-array in terms of beam direction, use the disturbance matrix and disturbance vector to compensate the received data of the subsequent sub-arrays and the beam output of the first sub-array respectively, and use the optimization technology to respectively Obtain the weights of the subsequent sub-arrays; the weights of the subsequent sub-arrays are respectively weighted to the received data of the corresponding sub-arrays to obtain the beam outputs of the subsequent sub-arrays; the beam outputs of each sub-array are non-coherently superimposed to obtain the full-array beam output. The purpose of the present invention is to provide a robust implementation method for flexible array beamforming to address the defects of the prior art, which effectively solves the problem that beamforming technology is limited by array distortion.

Description

technical field [0001] The invention relates to the technical field of sonar, in particular to a method for realizing robustness of flexible array beamforming. Background technique [0002] The towed line array is far away from the tugboat, which reduces the influence of platform self-noise on the performance of the array; it can change the working depth and make better use of the hydrological environment; there is no limitation of the space of the tugboat itself, and the size of the array is designed to be larger. Compared with traditional sonar, it has the advantages of large array aperture, long detection distance and high measurement accuracy. However, due to the influence of water flow, internal waves and other factors, usually, the formation of the drag line array is distorted, so that the actual position of each array element deviates from the ideal position. During beamforming, the steering vector is biased, and the target detection performance is seriously degraded...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/524G01S7/534
CPCG01S7/524G01S7/534
Inventor 幸高翔陆代强姚直象张森姜可宇程广利
Owner NAVAL UNIV OF ENG PLA
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