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首页> 外文期刊>IEEE Journal of Oceanic Engineering >Inverse Synthetic Aperture Sonar Imaging of Underwater Vehicles Utilizing 3-D Rotations
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Inverse Synthetic Aperture Sonar Imaging of Underwater Vehicles Utilizing 3-D Rotations

机译：利用三维旋转的水下车辆逆合成孔径声纳成像

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摘要

Inverse synthetic aperture sonar (ISAS) can obtain the image of a moving underwater vehicle (UV) with both high range resolution and high cross-range resolution. Existing ISAS imaging methods are based on the translational motion of the UV. Since a real UV also does 3-D rotations, these methods suffer from defocusing especially in severe sea condition. Hence, a novel ISAS imaging method utilizing the 3-D rotations is proposed in this paper. Under the 3-D rotational model, the echo in slow time is simplified as an amplitude modulated-cubic phase signal (AM-CPS), and a high precision signal parameter estimation algorithm based on the Radon transform cubic phase function is presented to process the AM-CPS. Moreover, the image plane is analyzed. The result shows that the ISAS imaging method based on the 3-D rotations can obtain the target's images on more image planes compared with the translational motion based methods, and the image quality is improved compared with other signal parameter estimation algorithms. The simulation verifies the effectiveness of the proposed method.
机译：逆合成孔径声纳（ISAS）可以通过高范围分辨率和高交叉量分辨率获得移动水下车辆（UV）的图像。现有的ISAS成像方法基于UV的平移运动。由于真实的UV也是3-D旋转，因此这些方法尤其在严重的海洋状况下遭受散焦。因此，本文提出了利用3-D旋转的新型ISAS成像方法。在3-D旋转模型下，慢速的回声被简化为幅度调制 - 立方相位信号（AM-CP），并提出了一种基于Radon变换立方相位函数的高精度信号参数估计算法以处理AM-CPS。此外，分析了图像平面。结果表明，与基于转换运动的方法相比，基于3-D旋转的ISAS成像方法可以在更多图像平面上获得目标的图像，与其他信号参数估计算法相比，图像质量得到改善。模拟验证了所提出的方法的有效性。

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