| 陈新华,张龙恩,郑恩明,申昇,韩莹.基于干涉条纹的目标方位估计校正方法*[J].,2025,44(5):1342-1355 |
| 基于干涉条纹的目标方位估计校正方法* |
| Target azimuth estimation correction method based on interference fringes |
| 投稿时间：2024-04-03 修订日期：2025-08-28 |
| 中文摘要: |
| 针对深海海底反射工作方式下，目标方位估计出现的估计偏差和方位分裂现象，该文提出了一种基于干涉条纹的目标方位估计校正方法。该方法首先通过海底反射声线与海底-海面反射声线时延差在波束域信号干涉条纹的映射，建立了干涉条纹间隔与到达俯仰角关系；然后依据俯仰角估计结果和水平线阵测量结果，对近水面目标方位角估计结果实现了校正；最后采用数值仿真对不同情况下的目标方位校正情况进行了验证分析。数值仿真结果表明：在仿真条件下，目标位水平线阵20 km、0°~15°时，方位角估计误差由19.62°减小为2.59°，目标位水平线阵15°~90°时，方位角估计误差由6.14°减小为0.42°。该方法有效提升了水平线阵在不同探测模式下目标方位角估计结果的准确性。 |
| 英文摘要: |
| This paper proposes a target orientation estimation correction method based on interference fringes to address the estimation bias and orientation splitting phenomenon in target orientation estimation under deep-sea seabed reflection working mode. This method first establishes the relationship between the interval of interference fringes and the arrival elevation angle by mapping the time delay difference between the bottom-reflected wave and the bottom-reflected-surface-reflected wave on the interference fringes of the beam domain signal; Then, based on the elevation angle estimation results and horizontal line array measurement results, the azimuth estimation results of targets near the water surface were corrected; Finally, numerical simulation was used to verify and analyze the target orientation correction under different conditions. The numerical simulation results show that under simulation conditions, when the target is located at a horizontal line array of 20 km and 0°~15°, the azimuth estimation error decreases from 19.62° to 2.59°. When the target is located in the horizontal line array at 15°~90°, the azimuth estimation error decreases from 6.14° to 0.42°. This method effectively improves the accuracy of target azimuth estimation results for horizontal linear arrays in different detection modes. |
| DOI：10.11684/j.issn.1000-310X.2025.05.025 |
| 中文关键词: 目标方位估计 深海 海底反射 干涉条纹 |
| 英文关键词: Target direction estimation Deep sea Bottom bounce Interference fringe |
| 基金项目:装备预先研究项目 |
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