合成孔徑聲吶并行實時處理研究
Study on real-time and parallel implementation of synthetic aperture sonar signal processing
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摘要: 該文論述了合成孔徑聲吶(Synthetic Aperture Sonar,SAS)系統(tǒng)的圖像重建算法選擇、參數(shù)選擇和并行處理方式,并提出一種基于 SHARC信號處理機 SAS實時成像實現(xiàn)方法,結(jié)合自行研制的原理樣機中信號處理系統(tǒng)特點,采用兩級流水線:第一級利用空間采樣間隔時間做序貫處理,完成正交解調(diào)、脈沖壓縮功能;第二級采用批(幀)處理完成方位聚焦。兩級流水線,僅用一級(第二級)的時間開銷,就完成了圖像重建。為滿足實時性要求,兩級都采用了并行處理。
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關(guān)鍵詞:
- 合成孔徑聲吶（SAS）; 實時處理; 聲吶成像
Abstract: Reconstruction algorithms for Synthetic Aperture Sonar (SAS) are discussed, and choice of SAS parameters and parallel structures are studied in this paper. A SHARC-based real-time processing system for SAS imaging is presented. Two pipelines are used in the system. The first pipeline makes full use of pulse repetition interval and proceed data sequentially, and the second one focuses image data in frame. Therefore, SAS image is reconstructed with only one stage time-consumption though two stages are used. Moreover, parallel processing are used in both stages to meet real-time requirement. -
M.P. Hayes, P. T. Gough, Broad-band synthetic aperture sonar, IEEE J. of Oceanic Engineering, 1992, 17(1), 80-94.[2]P.T. Gough, D. W. Hawkins, Imaging algorithms for a strip-map synthetic aperture sonar: minimizing the effects of aperture errors and aperture undersampling, IEEE J. of Oceanic Engineering, 1997, 22(1), 27-39.[3]A.E. Adams, M. A. Lawlor, V. S. Riyait, O. R. Hinton, B. S. Sharif, Real-time synthetic aperture sonar processing, IEE Proc.-Radar, Sonar and Navigation, 1996, 143(3), 169-175.[4]V.S. Riyait, M. A. Lawlor, A. E. Adams, O. H. Hinton, B. Sharif, Real-time synthetic aperture sonar imaging using a parallel architecture, IEEE Trans. on Image Processing, 1995, IP-4(7),1010-1019. -
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