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《Journal of Zhejiang University(Engineering Science)》 2014-02
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Underwater 3D imaging by distributed and parallel subarray beamforming algorithm

HAN Ye-qiang;TIAN Xiang;CHEN Yao-wu;Institute of Advanced Digital Technology and Instrumentation,Zhejiang University;Zhejiang Provincial Key Laboratory for Network Multimedia Technologies;  
A distributed and parallel subarray beamforming algorithm(DPS)was proposed in order to reduce the computational load associated with the signal processing in the underwater real-time 3D sonar imaging system.A full-populated transducer array was subdivided into two stage distributed subarrays.All of the first-stage subarrays used parallel computing framework and performed parallel beamforming simultaneously.The distributed computing framework was adopted between the first and second stage subarray.The second-stage subarray acquired the final beam pattern after beamforming.The Matlab software simulated the results of the algorithm in different conditions,and compared them with the conventional beamforming algorithm(CBF).The most reasonable method of subarray decompositions was given based on four parameters:main lobe width,side lobe peak,memory requirement,and computational requirement.The results demonstrate that the DPS algorithm implements the underwater 3D sonar imaging and meets the demand of engineering utilizations.
【Fund】: 国家自然科学基金资助项目(41276090);; 国家“863”高技术研究发展计划资助项目(2010AA09Z104);; 中央高校基本科研业务费专项资金资助
【CateGory Index】: U666.7
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