| 合成孔径声呐成像自聚焦方法研究 |
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| 引用本文： | 刘纪元, 唐劲松, 孙宝申, 张春华, 李启虎. 合成孔径声呐成像自聚焦方法研究[J]. 声学学报, 2003, 28(2): 151-154. DOI: 10.15949/j.cnki.0371-0025.2003.02.011 |
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| 作者姓名： | 刘纪元 唐劲松 孙宝申 张春华 李启虎 |
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| 作者单位： | 中国科学院声学研究所,北京,100080;中国科学院声学研究所,北京,100080;中国科学院声学研究所,北京,100080;中国科学院声学研究所,北京,100080;中国科学院声学研究所,北京,100080 |
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| 摘 要： | 合成孔径声呐(Synthetic Aperture Sonar,简称SAS)载体的随机运动、声波传播媒质不稳定等会影响成像的质量。大的运动误差可由运动补偿修正,但残余运动误差和媒质的影响需要自聚焦方法来修正。本文推导出小的SWAY误差下脉冲压缩图象域内运动误差模型,并将合成孔径雷达(Synthetic Aperture Radar,简称SAR)中的PATCH-PGA方法用于SAS自聚焦,仿真实验和湖试结果表明了该方法的有效性。
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| 收稿时间： | 2001-09-19 |
| 修稿时间： | 2002-02-27 |
On the autofocus of synthetic aperture sonar |
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| LIU Jiyuan, TANG Jingsong, SUN Baoshen, ZHANG Chunhua, LI Qihu. On the autofocus of synthetic aperture sonar[J]. ACTA ACUSTICA, 2003, 28(2): 151-154. DOI: 10.15949/j.cnki.0371-0025.2003.02.011 |
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| Authors: | LIU Jiyuan TANG Jingsong SUN Baoshen ZHANG Chunhua LI Qihu |
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| Affiliation: | 1.Institute of Acousitcs, The Chinese Academy of Sciences Beijing 100080 |
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| Abstract: | Synthetic aperture sonar imaging is affected by random motion and medium instability. Large motion errors can be corrected by means of motion compensation, while the effects of uncompensated errors and medium instability should be compensated for with aotofocus method. SAS error model is derived in range-compressed domain under the assumption of small sway error. Moreover, patch-PGA used in SAR is studied in using SAS and the simulation and underwater experiments in a lake show the validity of the method. |
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