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检索条件"主题词=Distributed and parallel subarray beamforming"

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distributed and parallel subarray beamforming for Near-Field 3D Sonar Imaging 3

Distributed and Parallel Subarray Beamforming for Near-Field...

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3rd International Conference on Computer Science and Network Technology (ICCSNT)

作者： Han, Yeqiang Fu, Jiabao Zhou, Fan Tian, Xiang Chen, Yaowu Zhejiang Univ Inst Adv Digital Technol & Instrumentat Hangzhou Zhejiang Peoples R China Zhejiang Prov Key Lab Network Multimedia Technol Hangzhou Zhejiang Peoples R China

ISBN: (纸本)9781479905614

The computational load is prohibitive in 3D sonar systems for real-time image generation. In the literature, an efficient frequency beamforming method based on the distributed and parallel subarray (DPS) has been introduced for planar arrays working in the far field. This paper extends the DPS beamforming algorithm to process the signals acquired from a scene in the near field. The alogrithm divides the full populated transducer array into two stage distributed subarrays. It performs parallel beamforming on the first-stage subarrays and applies the approximation for time delays in the near-field beam patterns of the second-stage subarray. The computational efficiency is significantly improved as compared with the traditional methods, while achieving the similar resolutions. In addition, a multi-FPGA signal processor is proposed for implementing the underwater 3-D imaging.

关键词： underwater 3D imaging sonar sensor array system sonar signal processing distributed and parallel subarray beamforming

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distributed and parallel subarray beamforming for Underwater Real-Time 3-D Acoustic Imaging

Distributed and Parallel Subarray Beamforming for Underwater...

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2nd International Conference on Computer Science and Network Technology (ICCSNT)

作者： Han, Yeqiang Zhou, Fan Tian, Xiang Chen, Yaowu Zhejiang Univ Inst Adv Digital Technol & Instrumentat Hangzhou 310003 Zhejiang Peoples R China

ISBN: (纸本)9781467329644;9781467329637

In this paper, we propose a distributed and parallel subarray beamforming (DPS) algorithm for performing underwater real-time 3-D acoustic imaging. The principle idea of this algorithm is that the full populated sensor array is subdivided into two stage distributed subarrays and the beamforming is carried out in parallel for each stage subarray. The proposed algorithm overcomes the problems of massive computational load affecting the engineering applications of the conventional beamforming techniques, while achieving the similar resolutions. The memory requirement obtained with the proposed algorithm is reduced by four orders of magnitude and the computational requirement is reduced by two orders of magnitude when compared with the conventional beamforming (CBF). The simulation and the comparisons illustrate the results and the efficiency of the algorithm.

关键词： Underwater 3-D acoustic imaging sonar sensor array system sonar signal processing distributed and parallel subarray beamforming conventional beamforming

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distributed and parallel subarray beamforming for Underwater Real-Time 3-D Acoustic Imaging

Distributed and Parallel Subarray Beamforming for Underwater...

引用

International Conference on Computer Science and Network Technology

作者： Yeqiang Han Fan Zhou Xiang Tian Yaowu Chen Institute of Advanced Digital Technology and Instrumentation Zhejiang University

ISBN: (纸本)9781467329637