一种修改的近场目标定位方法,基于矢量对角负载
Qing Ji1, Dawei Xiao2, Lulu Du3
1Naval University of Engineering, Wuhan, China.
Scientific reports
|October 29, 2025
概括
这项研究增强了用于水下声学定位的最小变量距离互换 (MVDR) 算法. 通过结合矢量水声机和改进的角度加载技术,它可以在有限的数据下提高性能.
科学领域:
- 海洋声学 海洋声学
- 信号处理 信号处理
- 阵列信号处理系统的信号处理.
背景情况:
- 近场最小变量距离互换 (MVDR) 算法性能在有限的采样数据下降.
- 降解与最佳重量向量和输出功率频谱特征有关.
- 现有的方法在低快照场景中与分辨率退化作斗争.
研究的目的:
- 为了提高MVDR算法的稳定性和定位精度,在数据有限的近场场景中.
- 为解决传统角度加载技术中的分辨率降解问题.
- 为了提高水下声学目标的定位性能.
主要方法:
- 集成矢量水声机与改进的角度加载技术.
- 从最佳重量向量和输出功率频谱的角度分析MVDR性能退化.
- 开发一种新的角度加载方法,包括使加载特征值成正方形,以创建一个改进的协差矩阵.
主要成果:
- 提议的改进角度加载算法提高了与传统方法相比的分辨率.
- 改进的算法表现出与现有技术可比的性能.
- 模拟和实验数据验证了算法的有效性和稳定性.
结论:
- 改进的角度加载算法有效地解决了分辨率退化问题.
- 矢量水声机和增强的角度负载的结合方法适用于近距离水下声学目标定位.
- 这种方法为具有挑战性的声学定位任务提供了更强大的解决方案.
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