用单个静止传感器对移动的波声源进行可靠的速度估计
Yixin Yang1,2, Ningning Liang3, Jianbo Zhou1,2
1School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an, China, 710072.
JASA express letters
|April 3, 2024
概括
一个新的成本函数可以在杂的海洋环境中改善声源速度估计. 这种方法提高了移动声源的准确性,即使信号质量低.
科学领域:
- 声学和信号处理
- 海洋学和水下声学研究
背景情况:
- 由于无处不在的噪音,在水下环境中估计声源参数具有挑战性.
- 传统的方法经常在低信号噪声比 (SNR) 条件下扎,限制了准确性.
- 强大的参数估计对于水下声源跟踪和分析至关重要.
研究的目的:
- 开发一种新的,对噪声不敏感的成本函数,用于估计经过均线性运动的声源的速度.
- 在低SNR场景中提高参数估计算法的稳定性.
- 为了提高声学参数估计的计算效率.
主要方法:
- 开发了一个成本函数,可以在时间频平面中权衡和整合接收的音调能量.
- 将观察到的瞬间频率定律集成到重量计算中,以提高噪声抗性.
- 利用成本函数的可区分性来有效估计参数.
- 处理了来自SWellEx-96实验的真实世界海洋噪音数据.
主要成果:
- 与传统方法相比,开发的成本函数显示出优越的防噪能力.
- 即使在显著的海洋噪声干扰下,也可以准确估计声源速度.
- 该方法在低信号噪声比条件下证实了稳定性.
- 由于成本函数的可分化性质,观察到高计算效率.
结论:
- 拟议的对噪声不敏感的成本函数为在具有挑战性的水下环境中估计声源速度提供了强大而高效的解决方案.
- 这一进步对于需要在低SNR条件下可靠的参数估计的应用特别有利.
- 该方法显示了改善水下声学监测和监测系统的巨大潜力.
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