| 袁笑,徐铭,谢世伟,高子聪,苟欣迪.基于最小Csiszár’s I-散度的高精度深度定位方法*[J].,2023,42(3):483-492 |
| 基于最小Csiszár’s I-散度的高精度深度定位方法* |
| The method for high-resolution source depth localization based on minimum Csiszár’s I- divergence |
| 投稿时间：2022-02-01 修订日期：2023-04-26 |
| 中文摘要: |
| 模态波束形成技术可用于水下目标定位，在深度定位方面，其定位精度(百米量级)往往不能满足实际需求；因此，高精度的深度定位方法需要被探索。传统高精度估计方法，如最小方差无畸变响应，面临着许多问题，如需要大量的快拍样本数等。最小Csiszár’s I-散度的迭代算法可以解决线性系统的求逆问题，但需满足系统的非负性条件，在图像的去模糊领域已得到广泛应用。该文将此算法和模态波束形成技术相结合，提出了一种新的高精度深度定位方法。基于SWellEx-96实验的海洋环境参数，分别用仿真和实验数据验证了该方法的以下性能：实现深度的高精度定位且抑制旁瓣能量；在小快拍数的情况下，深度定位性能良好。 |
| 英文摘要: |
| Modal beamforming technique is used for target localization; In terms of depth localization, its estimation accuracy (hundreds of meters) often can not meet the actual demand. Therefore, high-resolution depth localization methods need to be explored. Traditional high-resolution methods, such as MVDR, are faced with many problems, such as the need for a large number of snapshots and so on. The iterative algorithm of minimum Csiszár''s I-Divergence can solve the inverse problem of linear systems, but it needs to satisfy the nonnegative condition of the system, and has been widely used in the field of image deblurring. In this paper, a new high-resolution depth location method is proposed by combining the algorithm with modal beamforming technology. Based on the ocean environmental parameters of SWellex-96 experiment, the performance of the proposed method is verified by simulation and experimental data respectively: it not only retains the robustness of conventional beamforming method, but also achieve the high-resolution localization; In the case of small number of snapshots, the depth localization performance is good. |
| DOI：10.11684/j.issn.1000-310X.2023.03.005 |
| 中文关键词: 模态波束形成 Csiszár’s I-散度 非负性条件 深度定位 |
| 英文关键词: modal beamforming Csiszár’s I-散度 nonnegative condition depth localization |
| 基金项目:61827810 |
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