Flow noise and its suppression in exposed hydrophone

Y Wei, M Li, J Liu, Y Chen, F Qu, M Zhang - Applied Acoustics, 2021 - Elsevier
Underwater acoustic communications (UWAC) is an important technology in deep-sea
research. In UWAC system, when the hydrophone as an acoustic receiver is exposed under …

Chromatic derivatives and approximations in practice—part II: nonuniform sampling, zero-crossings reconstruction, and denoising

A Ignjatović, C Wijenayake… - IEEE Transactions on …, 2017 - ieeexplore.ieee.org
Chromatic derivatives are special, numerically robust differential operators that preserve
spectral features of a signal; the associated chromatic approximations accurately capture …

Chromatic derivatives and approximations in practice—part i: A general framework

A Ignjatović, C Wijenayake… - IEEE Transactions on …, 2017 - ieeexplore.ieee.org
Chromatic derivatives are special, numerically robust differential operators that preserve
spectral features of a signal; the associated chromatic approximations accurately capture …

Acquisition and Processing of Chromatic Derivatives using FPGA-based Digital Hardware

Z Zhong, P Nanthakumar, G Field… - … on Circuits and …, 2024 - ieeexplore.ieee.org
Chromatic derivatives (CDs) and associated chromatic approximations (CAs) provide a
numerically robust and powerful framework for digital processing of continuous-time/space …

Inference of the ocean sound speed profile using ambient vertical beam noise

RT Taylor - 2023 - repositories.lib.utexas.edu
This dissertation introduces a novel passive acoustic method for estimating the water
column sound speed using the directionality of the ambient noise field measured with a …

Bearing Estimation in the Presence of Surface Noise Using a 2D Array

P Zetterberg, RL Nordström - OCEANS 2024-Halifax, 2024 - ieeexplore.ieee.org
We consider a rectangular grid of m_h horizontal by m_v vertical hydrophones (in total
m=m_hm_v elements). The array is mounted on a rigid structure in a plane perpendicular to …

Hardware Acceleration of Multiple-Input Multiple-Output Underwater Acoustic Communication Systems

J Li - 2023 - search.proquest.com
This Ph. D. dissertation investigates the hardware acceleration of a Single-Carrier Coherent
Modulation (SCCM) Multiple-Input and Multiple-Output (MIMO) underwater acoustic (UWA) …

Acquisition of high bandwidth signals by sampling an analog chromatic derivatives filterbank

A Antonir, C Wijenayake… - 2021 IEEE International …, 2021 - ieeexplore.ieee.org
A method for acquisition of high bandwidth signals is presented as a typical example of a
signal processing application of chromatic derivatives and approximations. Chromatic …

NUMERICAL SIMULATION AND EXPERIMENTAL RESEARCH OF HYDROPHONE FLOW NOISE

M Li, J Liu, Y Wei, F Qu, M Zhang, Z Ding - 2020 - asmedigitalcollection.asme.org
Retracted: “Numerical Simulation and Experimental Research of Hydrophone Flow Noise” [ASME
2020 39th International Conference on Ocean, Offshore and Arctic Engineering, Volume 6B …

低频水声通信系统水听器流噪声数值分析.

瞿逢重, 魏艳, 丁再冉 - Journal of Signal Processing, 2019 - search.ebscohost.com
低频水声通信是实现远距离水下无线通信的一种重要方式, 在海洋科考, 环境监测及军事等领域
应用广泛. 流噪声是制约低频水声通信传输距离的重要因素之一. 不同于以往对充油的拖曳线列 …