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A Far-Field Distributed Parallel Subarray Beamforming Method

A distributed, beam-oriented technology, applied in radio wave measurement systems, instruments, etc., to improve computing efficiency, save parameter storage space, and meet real-time requirements

Active Publication Date: 2016-11-30
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The latter requires less computing requirements than the former, but requires more memory space to store pre-calculated delay parameters

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  • A Far-Field Distributed Parallel Subarray Beamforming Method
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  • A Far-Field Distributed Parallel Subarray Beamforming Method

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Embodiment Construction

[0030] In order to describe the present invention more specifically, the far-field distributed parallel sub-array beamforming algorithm of the present invention will be described in detail below with reference to the drawings and specific implementation methods.

[0031] A far-field distributed parallel subarray beamforming method, comprising the following steps:

[0032] (1) if figure 1 As shown, the full transducer array is divided into several first-level sub-arrays, each first-level sub-array is used as a basic unit, and all first-level sub-arrays form a second-level sub-array.

[0033] The purpose of sub-array division is to reduce the memory requirement and calculation amount of beamforming. A full array of transducers consisting of N×N transducers with a transducer spacing of d is decomposed into Nb×Nb shapes Regular and non-overlapping square sub-arrays (that is, first-level sub-arrays), each sub-array is composed of Na×Na transducers.

[0034] With each first-level ...

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Abstract

The invention discloses a far-field distributed parallel sub-array beamforming method, which includes the following steps: (1) Divide the full transducer array into several first-level sub-arrays, and each first-level sub-array is used as a basic unit, All first-level sub-arrays form a second-level sub-array; (2) All first-level sub-arrays perform beamforming in parallel; (3) The beamforming result of each first-level sub-array is used as a primitive of the second-level sub-array, after beam extraction After that, the secondary subarray beamforming is performed. The far-field distributed parallel subarray beamforming method provided by the present invention can obtain a beam pattern similar to the main lobe width and side lobe peak value of the direct beamforming algorithm on the premise of reducing the delay parameter storage space and calculation load, greatly The magnitude improves the calculation efficiency and meets the real-time requirements of underwater three-dimensional sonar imaging.

Description

technical field [0001] The invention relates to the field of three-dimensional sonar imaging, in particular to a far-field distributed parallel sub-array beamforming method. Background technique [0002] The role of underwater detection technology in the fields of physics, biology, geography, archaeology and industrial applications has become increasingly prominent. Real-time 3D sonar imaging technology is one of the most important innovations in the field of underwater applications in recent years. [0003] According to the imaging principle, underwater three-dimensional acoustic imaging systems include three categories: (1) holographic acoustic imaging; (2) acoustic lens imaging; (3) beamforming acoustic imaging. The detection range of the holographic acoustic imaging system is narrow; while the acoustic lens imaging system increases with the increase of the detection distance, the volume requirement of the optical prism is too large; with the rapid development of digital ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/52
Inventor 陈耀武韩业强周凡田翔蒋荣欣
Owner ZHEJIANG UNIV