High-resolution time reversal focused localization method of cylindrical noise source with horizontal array

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (22) : 92-97.

HAN Chuang1,2，YU Shuhua1,2，SHI Shengguo1,2，HE Panpan1,2，SHI Jie1,2

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Abstract

在浅海条件下，利用水平阵对水下目标进行噪声源近场高分辨定位时会受到海面、海底形成的多途效应的影响，定位结果具有严重的背景起伏,甚至出现虚假目标。在建立水平阵近场柱面聚焦测量模型的基础上，分别研究了适用于单频线谱信号和宽带连续谱信号的水平阵柱面聚焦定位方法。该方法一方面将幅度补偿引入到MVDR近场聚焦波束形成中，充分利用了声波的幅度信息和相位信息;另一方面根据基于射线理论的虚源法建立的水声相干多途信道模型和静态介质中波传播的互易性和时反不变性，生成了与水声信道特征信息相匹配的空间聚焦导向矢量。计算机仿真实验结果表明，该方法可以有效克服多途效应的影响，实现柱面声源高分辨定位。

Key words

多途效应 / 柱面聚焦波束形成 / MVDR / 幅度补偿 / 虚拟时间反转镜

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HAN Chuang1,2，YU Shuhua1,2，SHI Shengguo1,2，HE Panpan1,2，SHI Jie1,2. High-resolution time reversal focused localization method of cylindrical noise source with horizontal array[J]. Journal of Vibration and Shock, 2015, 34(22): 92-97

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