Deconvolved Beamforming for a Compact Conformal Array on a Three-dimensional Mobile Platform

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2023-08-28 DOI:10.1007/s40857-023-00304-w

Dajun Sun, Ke Zhang, Jidan Mei, Wenting Cui, Yuqing Pei

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Abstract

A robust and high-resolution deconvolution algorithm based on coordinate correction is developed for a compact conformal array on a three-dimensional (3D) moving platform such as underwater glider. First, the coordinate-correcting conventional beamforming is derived to directly estimate the azimuth of the long-range targets in the geodesic coordinate system for a 3D moving platform array. Then, we improve the extended Richardson–Lucy deconvolution (Ex-RL-dCv) beamforming algorithm utilizing coordinate correction to simplify the bearing estimation model from two-dimensional (2D) to one-dimensional (1D). The improved algorithm corrects the deconvolution point spread function (PSF) dictionary mismatch caused by the platform’s 3D motion, and has lower sidelobes compared with the Ex-RL-dCv algorithm without coordinate correction. Finally, simulations and results from field-trial data processing are presented. The results demonstrate that the improved Ex-RL-dCv beamforming based on coordinate correction can significantly suppress the high sidelobes caused by deconvolution model mismatch, and successfully realize the robust and high-resolution detection for targets using the compact conformal array on a 3D mobile platform.

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三维移动平台上紧凑型共形阵列的反卷积波束形成

针对水下滑翔机等三维运动平台上的紧凑共形阵列，提出了一种基于坐标校正的鲁棒高分辨率反褶积算法。首先，推导了用于三维移动平台阵列测地坐标系下远程目标方位直接估计的坐标校正常规波束形成方法;然后，利用坐标校正对扩展Richardson-Lucy反褶积(Ex-RL-dCv)波束形成算法进行改进，将方位估计模型从二维(2D)简化为一维(1D)。改进算法修正了平台三维运动引起的解卷积点扩散函数(PSF)字典不匹配问题，与不进行坐标校正的Ex-RL-dCv算法相比，具有更低的副瓣。最后给出了仿真和现场试验数据处理的结果。结果表明，改进的基于坐标校正的Ex-RL-dCv波束形成能显著抑制反褶积模型失配导致的高副瓣，成功实现了三维移动平台上紧凑共形阵列目标的鲁棒高分辨率检测。

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来源期刊

Acoustics Australia ACOUSTICS-

自引率

5.90%

发文量

期刊介绍： Acoustics Australia, the journal of the Australian Acoustical Society, has been publishing high quality research and technical papers in all areas of acoustics since commencement in 1972. The target audience for the journal includes both researchers and practitioners. It aims to publish papers and technical notes that are relevant to current acoustics and of interest to members of the Society. These include but are not limited to: Architectural and Building Acoustics, Environmental Noise, Underwater Acoustics, Engineering Noise and Vibration Control, Occupational Noise Management, Hearing, Musical Acoustics.

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