Radial velocity estimation method for a single hydrophone based on passive target line spectrum characteristics

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2024-09-11 DOI:10.1016/j.apacoust.2024.110266

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引用次数: 0

Abstract

Passive radial velocity estimation based on a single hydrophone has a wide range of applications in engineering, and can be used in small underwater platforms such as submerged buoys and underwater gliders. The conventional passive radial velocity estimation method based on a single hydrophone has poor performance due to the influence of noise. In this paper, the time delay coherence coefficient (TDCC) of passive target line spectrum is derived based on a single hydrophone. Further, the radial velocity can be obtained by the time delay required by the phase change of TDCC for one period. Based on the characteristics that the line spectrum phase is stable and the noise phase is random, coherent averaging (CA) is applied to suppress noise. The use of CA greatly reduces the influence of noise on TDCC and efficiently improves the accuracy of radial velocity estimation. The performance and system error of the proposed CA-TDCC method are analyzed through a series of simulations. Finally, the CA-TDCC method is used to process SwellEx-96 data, and the relative error of radial velocity estimation is less than 10%, which verifies the effectiveness of this method in practical applications.

Abbreviation: CA, Coherent averaging; SNRs, Signal-to-noise ratios; TDCC, Time delay coherence coefficient; TMA, Target motion analysis.

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基于被动目标线频谱特征的单个水听器径向速度估算方法

基于单个水听器的被动径向速度估算在工程领域有着广泛的应用，可用于小型水下平台，如水下浮标和水下滑翔机。由于噪声的影响，传统的基于单个水听器的被动径向速度估算方法性能较差。本文基于单个水听器推导出了被动目标线谱的时延相干系数（TDCC）。此外，还可通过 TDCC 相位变化一个周期所需的时间延迟来获得径向速度。根据线谱相位稳定而噪声相位随机的特点，采用相干平均法（CA）来抑制噪声。CA 的使用大大降低了噪声对 TDCC 的影响，有效提高了径向速度估计的精度。通过一系列仿真分析了所提出的 CA-TDCC 方法的性能和系统误差。最后，利用 CA-TDCC 方法处理 SwellEx-96 数据，径向速度估计的相对误差小于 10%，验证了该方法在实际应用中的有效性：缩写：CA，相干平均；SNRs，信噪比；TDCC，时延相干系数；TMA，目标运动分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.