水下目标深度估计:一种浅水宽带声源深度估计方法,基于纠正的曲折转换
PloS one
|February 13, 2025
概括
一种新方法改善了在浅海的水下声源深度估计,声速可变. 修改后的曲折变换 (MWT) 增强了模式分离以实现准确的定位,在模拟中实现了超过95%的成功率.
科学领域:
- 海洋声学 海洋声学
- 信号处理 信号处理
- 水下定位的定位方法
背景情况:
- 传统的声源深度估计方法在浅海与可变声速档案的浅海中遇到困难.
- 现有的技术,如波变换,受到理想波导的假设的限制.
研究的目的:
- 提出一个强大的宽带声源深度估计方法,用于不理想条件的浅海环境.
- 解决传统方法在处理可变音速配置文件时的局限性.
主要方法:
- 一个修改后的波变换 (MWT) 运算符被开发来补偿信号传播和反射阶段.
- 时间频率分析 (TFR) 用于投射修改的信号,实现清晰的模式分离.
- 模态能量被提取并用于构建一个深度估计函数.
主要成果:
- 与STFT和DDT相比,MWT在变频音速配置文件下在时间频率领域中显示出优越的模式分离.
- 拟议的方法在各种波导条件下在10 dB SNR的目标深度估计中取得了超过95%的成功率.
- 准确的深度估计是在真实海上实验中实现的,分离正常模式并定位空气枪脉冲源.
结论:
- 修改后的曲折转换方法有效地解决了在具有可变声速的非理想波导中被动源深度估计的挑战.
- 拟议的技术提供了更广泛的应用范围和更大的实际工程价值比传统的形转换方法.
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