| 运动声呐空时自适应处理中的多普勒影响分析 |
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| 引用本文： | 李娜,施博,郝程鹏.运动声呐空时自适应处理中的多普勒影响分析[J].海军航空工程学院学报,2018,33(1):106-110. |
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| 作者姓名： | 李娜 施博 郝程鹏 |
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| 作者单位： | 中国科学院声学研究所;中国科学院大学 |
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| 摘 要： | 为了将空时自适应处理(STAP)理论更好地应用于水下环境,提高运动声呐对混响的抑制性能,研究了多普勒对运动声呐STAP的影响。具体分析了由多普勒造成的回波脉宽伸缩变换以及目标空时导向向量失配带来的影响。分析结果表明,回波包络脉宽变化对于匹配滤波输出信噪比影响较小,而对空时导向向量修正可以有效提高目标方位估计精度以及混响抑制能力。
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| 关 键 词： | 空时自适应处理 多普勒效应 包络 修正项 混响 |
Doppler Effect Analysis for Modified Space-Time Adaptive Processing in Moving Sonar |
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| LI N,SHI Bo and HAO Chengpeng.Doppler Effect Analysis for Modified Space-Time Adaptive Processing in Moving Sonar[J].Journal of Naval Aeronautical Engineering Institute,2018,33(1):106-110. |
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| Authors: | LI N SHI Bo and HAO Chengpeng |
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| Institution: | The Institude of Acoustics of the Chinense Academy of Sciences, Beijing 100190, China;University of Chinese Academy of Sciences, Beijing 100049, China,The Institude of Acoustics of the Chinense Academy of Sciences, Beijing 100190, China and The Institude of Acoustics of the Chinense Academy of Sciences, Beijing 100190, China |
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| Abstract: | In order to apply the space-time adaptive processing (STAP) theory to the underwater environment and improvethe performance of reverberation suppression in moving sonar, the influence of Doppler in the on STAP of moving sonarwas studied. Firstly, according to the STAP process, the influence of Doppler on the matched filter and the space-timesteering vector was found. Then, specifically analyzing pulse width variation of echo and the mismatch of steering vector.The simulation results showed that the change of the echo envelope had little effect on the output signal-to-noise ratio ofthe matched filter. The correction of the space-time vector could improve the accuracy of the estimation of target directionand improve the reverberation suppression ability. |
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| Keywords: | space-time adaptive processing Doppler effect envelope correction item reverberation |
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