In shallow-water waveguide, the normal mode information of acoustic signals plays an important role in localization research. In this paper, an extraction algorithm of modal intensity distribution based on horizontal circular array is proposed. By using the horizontal wavenumber of each mode, the modal domain beamforming is used to estimate the modal intensity distribution of the acoustic signal. The theoretical derivation, data simulation and experimental data are used to verify the feasibility of the algorithm based on circular array and the superiority compared with the line array extraction algorithm. At the last part of the paper, an application based on modal intensity distribution is proposed: water surface interference suppression, and the effectiveness of the interference suppression algorithm is verified from theoretical derivation and simulation experiments.

中文翻译：

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一种基于水平圆阵列的模态强度分布估计算法

在浅水波导中，声信号的正模信息在定位研究中起着重要的作用。本文提出了一种基于水平圆阵列的模态强度分布提取算法。通过使用每个模式的水平波数，模态域波束形成用于估计声信号的模态强度分布。通过理论推导、数据仿真和实验数据验证了基于圆阵列的算法的可行性以及与线阵列提取算法相比的优越性。在论文的最后部分，提出了一种基于模态强度分布的应用：水面干扰抑制，