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拖曳线列阵声呐噪声测向方法及误差分析
Noise direction finding algorithm and error analysis of towed linear array sonar
- DOI:
- 作者:
- 翟昌宇, 卢中新
ZHAI Chang-yu, LU Zhong-xin
- 作者单位:
- 上海船舶电子设备研究所，上海 201108
Shanghai Marine Electronic Equipment Research Institute, Shanghai 201108, China
- 关键词:
- 线列阵;噪声测向;测向误差;高精度
linear array; noise direction finding; DF error; high-precision
- 摘要:
- 开展抗干扰能力强的高精度线列阵测向算法研究，对于提高拖曳线列阵声呐装备实际作战性能具有重要意义。本文给出一种适用于拖曳线列阵声呐的宽带噪声信号波达方向估计方法，利用波束形成结果，解算指向性图极大值位置，可以估算目标大致方位。分裂阵半波束处理输出左右子阵的相位差，通过解算可以精确估计波达方向。在此基础上，从阵列信号处理理论和水声工程应用角度，系统分析影响拖曳线列阵声呐噪声测向精度的各方面因素，探讨测向误差的分布规律，最后给出提高测向精度具体方法及修正措施。
The research on high-precision linear array direction finding algorithm with strong anti-jamming ability is of great significance to improve the actual combat performance of towed linear array sonar equipment. Using the beamforming results, the maximum position of the directivity map can be solved, and the approximate orientation of the target can be estimated. The split array half beam processing outputs the phase difference between the left and right subarrays, and the direction of arrival can be accurately estimated through calculation. Because its direction finding accuracy is greatly improved compared with the conventional beamforming technology and is close to the cramero lower bound, it has been widely studied and applied in the field of underwater acoustic engineering. This paper presents a direction of arrival (DOA) algorithm of broadband noise signal suitable for towed linear array sonar. On this basis, from the perspective of array signal processing theory and underwater acoustic engineering application, various factors affecting the noise direction finding accuracy of towed linear array sonar are systematically analyzed, the distribution law of direction finding error is discussed, and finally the specific methods and correction measures to improve the direction finding accuracy are given.
2023,45(3): 106-110 收稿日期：2022-04-28
DOI：10.3404/j.issn.1672-7649.2023.03.019
分类号：TB556
作者简介：翟昌宇(1981-),男,硕士,高级工程师,研究方向为水声工程
