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相关概念视频

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Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...
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相关实验视频

Updated: Jun 29, 2026

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在深海使用自适应FDSL与少数元素阵列的远程源定位.

Jingwen Yin1, Haklim Ko1, Hojun Lee1

  • 1Department of Information and Communication Engineering, Hoseo University, Asan 31499, Republic of Korea.

Sensors (Basel, Switzerland)
|March 14, 2026
PubMed
概括
此摘要是机器生成的。

新的自适应频差源定位 (FDSL) 方法增强了深海声源定位. 这些技术提高了准确性,并减少了侧叶,即使在小数组和低信号噪声比.

关键词:
在深海,深海.只有少数元素元素.频率差异源定位 (FDSL) 的方法远程源本地化定位技术匹配的现场处理 (MFP)最小偏差无扭曲响应 (MVDR) 的方法多个信号分类 (MUSIC)

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科学领域:

  • 海洋声学 海洋声学
  • 信号处理 信号处理
  • 地质物理学 地质物理学

背景情况:

  • 匹配场处理 (MFP) 在深海定位中与环境不匹配作斗争.
  • 频率差异匹配场处理 (FDMFP) 受到可毒相效应的限制.
  • 常规频差源定位 (FDSL) 需要大数组,增加成本和复杂性.

研究的目的:

  • 开发改进的FDSL方法,以稳定地定位深海源.
  • 解决传统FDSL在低信号噪声比 (SNR) 和小阵列场景中的局限性.
  • 为了提高分辨率和抑制侧叶在声学定位.

主要方法:

  • 拟议的自适应式FDSL-MVDR和FDSL-MUSIC方法.
  • 通过使用频差协差结构来导出适应性重量向量.
  • 重新定义了模两可的表面,以提高定位准确度.

主要成果:

  • 与传统的FDSL相比,自适应的FDSL方法显示出更高的峰值度和侧叶抑制.
  • FDSL-MUSIC实现了100%的本地化成功,SNR为-5dB,改进了4dB.
  • 方法在环境不匹配和少元素数组下显示出强大的性能.

结论:

  • 适应性FDSL方法显著提高了深海源局部化性能.
  • 拟议的技术使高精度定位能够使用具有成本效益的小光圈阵列.
  • 验证了高分辨率低SNR深海声学定位的可行性.