A Closed-Form Estimator Based on Array Invariant for Estimating the Initial State of Constant Velocity Target in Shallow Water
Zhezhen Xu, Northwestern Polytechnical University
Hui Li, Northwestern Polytechnical University
Kunde Yang, Northwestern Polytechnical University

Keywords: Shallow Water;Constant Velocity Traget;Initial State Estimation;Array Invariant

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A Dual-frequency Inversion Algorithm of Suspended Sediment Concentration
Mingyu Yin, Zhejiang University
Wen Xu, Zhejiang University
Di Jiang, Zhejiang University

Keywords: Broadband ADCP, backscatter intensity, suspended sediment concentration, dual frequency inversion

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A fractional Fourier transform approach for parametric array sub-bottom profiler signal processing
Hanyun Zhou, Zhejiang University
Shanhe Huang, Zhejiang University
Wei Li, Zhejiang University
Qingying Tu, Zhejing University

Keywords: fractional Fourier transform; parametric array;linear frequency modulation

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A long line array broadband adaptive beamforming with post-filtering and incoherent noise reduction
Hao Wang, Hangzhou applied acoustic institute
Hong Zhang, Hangzhou applied acoustic institute
Qiming Ma, Hangzhou applied acoustic institute

Keywords: Long line array; Broadband detection;Subarray Adaptive beamforming; Post filter.

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Acoustic inversion with a modified state-space model using ROMS
Ye Wang, Zhejiang University
Jianlong Li, Zhejiang University
Xiaogang Pan, Zhejiang University
Jing Chen, Zhejiang Unviersity
Xiaoxiao Han, Zhejiang University

Keywords: ROMS, Acoustic inversion, EnKF, State-space model, Sound speed profile

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Backscatter Features for Estimating Synthetic Aperture Sonar Bathymetry
Ole Lorentzen, University of Oslo
Torstein Sæbø, Norwegian Defence Research Establishment (FFI)
Roy Hansen, Norwegian Defence Research Establishment (FFI)

Keywords: SAS; sonar; interferometry; bathymetry; mapping

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Bayesian occupancy grid for active sonar detection and localization of moving targets
Karl Thomas Hjelmervik, FFI
Kristoffer Andreassen, FFI
Henrik Berg, FFI
Elin Bøhler, FFI
Dan Henrik Stender, FFI
Jørn Inge Vestgården, FFI

Keywords: Sonar; Processing; Sonar performance modelling; False alarm reduction

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Blind source extraction algorithm of LFM signal in given frequency modulation slope range
Junjie Luo, Institute of Acoustics, Chinese Academy of Sciences
Cheng Chi, Institute of Acoustics, Chinese Academy of Sciences
Jiyuan Liu, Institute of Acoustics, Chinese Academy of Sciences
Chunhua Zhang, Institute of Acoustics, Chinese Academy of Sciences

Keywords: LFM;limited blind source extraction;frequency modulation slope;negative entropy;range constraint

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Block Sparse Bayesian Learning Using Weighted Laplace Prior for Super-Resolution Estimation of Multi-Path Parameters
Qiyan Song, University of Chinese Academy of Sciences
Xiaochuan Ma, Institute of Acoustics, Chinese Academy of Sciences

Keywords: Block Sparse Bayesian Learning; Weighted Laplace Prior;Super-Resolution Estimation of Multi-Path Parameters

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Comparative Study of Beamformers for a Single Acoustic Vector Sensor
Da Lu, Northwestern Polytechnical University
Hui Li, Northwestern Polytechnical University
Kunde Yang, Northwestern Polytechnical University
Zhezhen Xu, School of Marine Science and Technology Northwestern Polytechnical University

Keywords: beamforming; acoustic vector sensor; direction of arrival estimation; maximum likelihood; Cramer-Rao bound

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DOA Estimation of Arc Arrays Using Deconvolution with Shift-Variant PSF
Wenjun Duan, School of Marine Science and Technology, Northwestern Polytechnical University
Chao Sun, Northwestern Polytechnical University, School of Marine Science and Technology
Xionghou Liu, School of Marine Science and Technology, Northwestern Polytechnical University
Jingrong Wu, School of Marine Science and Technology, Northwestern Polytechnical University
Kuan Fan, School of Marine Science and Technology, Northwestern Polytechnical University

Keywords: Arc arrays; improved deconvolved conventional beamforming (IDCBF); modified Richardson-Lucy (R-L) algorithm; shift-variant point spread function (PSF)

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Deconvolved Conventional Beamforming and Encoder-decoder Fully Convolutional Networks for Recognition of Acoustic Beacon Signal
Huazhong Ji, Zhejiang University
Xiang Pan, Zhejiang University

Keywords: black box signal; fully convolutional network (FCN); encoder-decoder network; adaptive line enhancer (ALE); siganl enhancement

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Deep-Sea Biological Image Augmentation: A Generative Adversarial Networks-Based Application
Yushi Liu, Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences
Lixin Liu, Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences

Keywords: Deep-sea images; generative adversarial networks; data augmentation

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Design and Implementation of Underwater Inflatable Co-prime Sonar Array (UICSA)
Yanjun Li, Harbor Branch Oceanographic Institute/ Florida Atlantic University
Alex Schaff, Florida Atlantic University
Shadi Bavar, Florida Atlantic University
Bing Ouyang, Harbor Branch Oceanographic Institute
Tsung-chow Su, Florida Atlantic University
Tongdi Zhou, Temple University
Fauzia Ahmad, Temple University

Keywords: underwater inflatable structure; co-prime array; structural design; data logger

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Differential Ultrasonic Detection of Small Objects for Underwater Applications
Fabian John, Luebeck University of Applied Sciences
Roman Kusche, Luebeck University of Applied Sciences
Felix Adam, Luebeck University of Applied Sciences
Horst Hellbrueck, Luebeck University of Applied Sciences

Keywords: Underwater; Ultrasonic; Obstacle Detection; Cable Detection; Subbottom; Differential

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Discrimination method of convergence zones in deep sea based on machine learning
Yang Yang, Institute of Acoustics, Chinese Academy of Sciences
Lianghao Guo, Institute of Acoustics, Chinese Academy of Sciences
Zaixiao Gong, Institute of Acoustics, Chinese Academy of Sciences

Keywords: beamforming, convergence zone, machine learning, neural network

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DoA Estimation and Sensors Self-Calibration for Partially Calibrated Array
Fuwang Dong, College of automation, Harbin Engineering University
Wei Wang, College of automation, Harbin Engineering University
Ben Wang, College of automation, Harbin Engineering University

Keywords: DoA estimation; gain-phase error calibration; MUSCI algorithm; sensors self-calibration.

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ESPRIT-based Calibration of Multiple Sonobuoys Using a Moving Source
Anil Ganti, Duke University
Jeffrey Krolik, Duke University

Keywords: passive sonar; distributed arrays; ad-hoc arrays;sparse arrays; multi-aperture arrays; array calibration; ESPRIT

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Enhanced Beamforming via Bayesian Postprocessing
Chennan Shi, Southeast University
Jun Tao, Southeast University

Keywords: Beamforming; Bayesian estimation

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Estimating the spatial coherence of narrowband underwater acoustic signals
Roald Otnes, Norwegian Defence Research Establishment (FFI)
Roy Hansen, Norwegian Defence Research Establishment (FFI)

Keywords: Coherence estimation, spatial coherence, magnitude squared coherence, underwater acoustics

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Extending the range of forward looking sonar
Jianguo Zhang, Zhejiang University
Tsih Yang, Zhejiang University

Keywords: Forward looking sonar, AUV homing; source localization; deconvolution

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Feature analysis of measurement information from passive sonar array used for bearing fusion
Longxiang Guo, College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin
Xin Wang, Harbin Engineering University
Xueli Sheng, College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin

Keywords: array signal processing; bearing fusion

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Fourth-Order Cumulants based Underdetermined 2-D DOA Estimation using Single AVS
Umesh Sharma, Indian Institute of Technology, Delhi
Monika Agrawal, Indian Institute of Technology, Delhi

Keywords: Acoustic Vector Sensor; Compressive Sensing; Higher-Order Statistics; Underdetermined Direction of Arrival Estimation

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GPU Acceleration for Synthetic Aperture Sonar Image Reconstruction
isaac gerg, Penn State Applied Research Laboratory
Daniel Brown, Penn State Applied Research Laboratory
stephen wagner, Penn State Applied Research Laboratory
Dan Cook, GTRI
brian o'donnell, GTRI
thomas benson, smiths digital forge
tom montgomery, Penn State Applied Research Laboratory

Keywords: synthetic aperture sonar, graphics processing units, unmanned underwater vehicles, sub-bottom imaging, UUV position estimation

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Harnessing Gabor wavelet feature localization with diverse machine learning techniques for sonar target classification
Bernice Kubicek, University of Iowa
Ananya Sen Gupta, University of Iowa
Ivars Kirsteins, Naval Undersea Warfare Center

Keywords: sonar; target classification; acoustic color features; two-dimensional Gabor wavelet; feature extraction

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High-order Superdirectivity of Line Acoustic Vector Sensor Arrays
Shaohao Zhu, School of Marine Science and Technology, Northwestern Polytechnical University
Yong Wang, School of Marine Science and Technology, Northwestern Polytechnical University
Yixin Yang, School of Marine Science and Technology, Northwestern Polytechnical University
Honglei Wang, School of Marine Science and Technology, Northwestern Polytechnical University
Xionghou Liu, School of Marine Science and Technology, Northwestern Polytechnical University

Keywords: vector sensor; directional sensor; line array; superdirective beamformer

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Imaginary-to-Real Generative Network for Marine Organism Image Extrapolation
Dongsheng Guo, Ocean University of China
Zhaorui Gu, Ocean University of China
Haoru Zhao, Ocean University of China
Qingwei Song, Ocean University of China
Yunhao Cheng, Ocean University of China
Hongzhi Liu, Ocean University of China
Zhibin Yu, Ocean University of China
Haiyong Zheng, Ocean University of China
Bing Zheng, Ocean University of China

Keywords: Marine Organism;Image Extrapolation;Adversarial Generative Network

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Improved Capon Beamformer Using Fourier Integral Method (FIM)
Xionghou LIU, School of Marine Science and Technology
Chao SUN, School of Marine Science and Technology, Northwestern Polytechnical University
Yixin YANG, School of Marine Science and Technology
Jie ZHUO, School of Marine Science and Technology, Northwestern Polytechnical University
Cong WANG, School of Marine Science and Technology
Guoqing JIANG, School of Marine Science and Technology, Northwestern Polytechnical University
Wenjun DUAN, School of Marine Science and Technology, Northwestern Polytechnical University

Keywords: Adaptive beamformer; Capon beamformer; Fourier integral method (FIM); low signal-to-noise (SNR) ratio; underwater acoustics; underwater clutters suppression; underwater weak target detection

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In Situ Array Calibration for Synthetic Aperture Sonar
Jeremy Dillon, Kraken Robotic Systems Inc.
Shannon-Morgan Steele, Kraken Robotic Systems Inc.

Keywords: synthetic aperture sonar; sonar imaging; calibration

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MULTICHANNEL SPECTRAL ESTIMATION: A State-Space Approach to Spectral Processing
JAMES CANDY, LAWRENCE LIVERMORE NATIONAL LABORATORY
KARL FISHER, LLNL
JUSTIN CASE, LLNL
Thomas Goodrich, LLNL

Keywords: multichannel, state-space, spectral estimation, structural dynamics, vibration response

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Mixed Signal Separation Method Combined Deconvolution and Iterative Beamforming
Qingying Tu, Zhejiang University
Shanhe Huang, Zhejiang University
Hanyun Zhou, Zhejiang University

Keywords: Beamforming;Cicular array;Signal separation

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Modes Separation based on Compressive Sensing and Coordinate Transformation
Liang Yuquan, Institute of Acoustics, Chinese Academy of Sciences
Zhou Shihong, Institute of Acoustics, Chinese Academy of Sciences
Gong Zaixiao, Institute of Acoustics, Chinese Academy of Sciences

Keywords: normal mode separation; compressive sensing; coordinate transformation; horizontal line array; broadband; shallow water

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Node Authentication in Underwater Acoustic Sensor Networks Using Time-Reversal
Muhammad Khalid, Northwestern Polytechnical University, P.R. China
Ruiqin Zhao, Northwestern Polytechnical University, P.R. China
Xin Wang, Northwestern Polytechnical University, P.R. China

Keywords: Underwater acoustic communication; physical layer security; authentication; time-reversal (TR)

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Non-linear Processing for Underwater Detector using Time-Reversal based Cross-Ambiguity Function
Xueli Sheng, Harbin Engineering University
Siyuan Cang, Harbin Engineering University
Hang Dong, Harbin Engineering University
Longxiang Guo, Harbin Engineering University
Jingwei Yin, Harbin Engineering University

Keywords: Bio-inspired; cross ambiguity function; non-linear processing; convex optimization; time-reversal

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On Range-dimensional Performance Improvement of FD-MIMO Sonar Using Deconvolution

Keywords: FD-MIMO sonar; synthesized spectrum; R-L algorithm; deconvolution; range dimension

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Optimized aberration correction for sonar arrays

Keywords: sonar; beamforming; apodization; aberrations

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Passive Localization Based on Spectral Estimation Method Using Sources of Opportunity

Keywords: Sources of Opportunity; Spectral Estimation Method; Correlation; Ambiguity surface.

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Passive localization of moving targets based on the energy leakage from ocean surface duct

Keywords: passive localization; surface duct; energy leakage

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Performance Analysis of Highly Directional Receiver for Underwater applications

Keywords: HDAVS;FEM

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Physical Layer Authentication in Line-of-Sight Underwater Acoustic Sensor Networks

Keywords: Underwater acoustic communication; physical layer security; authentication, angle of arrival;

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Planar Synthetic Aperture Sonar Generalized to Irregular Sampling Grids

Keywords: Projective Planar Synthetic Aperture Sonar ; Generalized Planar Synthetic Aperture Sonar ;3D PSAS ;2×2D PSAS ; Strata images ; Simulation ; Tank experiment ; non-regular grid ; Resolution

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Power Spectral Density Estimation of Radiated Noise with Sparse Spectral Fitting

Keywords: radiated noise measurement; power spectral density estimation; sparse spectral fitting (SpSF); non-cooperative target

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RANSAC Compressive Sensing Reconstruction in Noisy Wideband Underwater Sonar Imaging

Keywords: Compressive Sensing; OMP; RANSAC; Sonar imaging; Sparsity; Noisy; Wideband.

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Research on Thruster Fault Diagnosis of Underwater Vehicle

Keywords: Underwater vehicle; Thruster fault diagnosis; Wavelet packet transform; Back propagation neural network; Support vector machine

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Robust one-bit DOA estimation for compressed massive MIMO system

Keywords: compressed sensing; direction-of-arrival (DOA); massive MIMO system; one-bit quantization; sparse signal reconstruction (SSR)

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Self-Interference Channel Characterization in Underwater Acoustic In-Band Full-Duplex Communications Using OFDM

Keywords: In-band full-duplex system; OFDM; Multipath; self-interference; Underwater acoustic communication

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Semi-Reference Utility Quality Assessment of Sonar Image

Keywords: sonar image;image quality assessment;global structure

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Ship acoustic signature measurements by using an AUV mounted vector sensor

Keywords: Vector sensor, AUV, signal-processing, acoustic signature

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Simulation and Experimental Demonstration of Sound Field Control Using Beam Deflection

Keywords: active noise control, sound field control, conventional beam deflection, the finite-element method, pool experiment

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Source localization using gradient boosting decision tree with a single hydrophone in deep ocean

Keywords: source localization;single hydrophone;GBDT;multipath time delays

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Sparse asymptotic minimum variance bearing estimation of underwater acoustic sources

Keywords: 3D estimation; Adaptive grid sparse asymptotic minimum variance; Bearing estimation; Horizontal cross array; Multiple signal classification;

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Sparsity and Adaptivity for Sensor Location Optimization of Underwater Conformal Vector Array

Keywords: iterative opimization algorithm;robust sparse array;conformal vector array

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Subarrays Combined Estimation of DOA Based on Covariance Matrix Pretreatment

Keywords: DOA;covariance matrix;subarrays;background level;strong and nonuniform noise.

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Synthetic Aperture Sonar Nadir Gap Coverage with Centimetric Resolution

Keywords: synthetic aperture sonar; sonar imaging; laser imaging; nadir gap filler; multibeam echo sounder

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Task Assignment of Multi-AUVs Based on Artificial Bee Colony Genetic Hybrid Algorithm

Keywords: task assignment; resource allocation; artificial bee colony algorithm; niched genetic

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The effect of elevation angle on bearing estimation for array beamforming in shallow water

Keywords: target bearing estimation; curved horizontal line array; conventional beamforming;deconvolution

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Towards non-cooperative bi-static sonar systems: source localization by multi-path time arrival matching

Keywords: non-cooperative sonar; matched filter processing; channel estimation; Bellhop

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Towed Array Shape Estimation Using Acoustic and Heading Data

Keywords: towed array;shape estimation;eigenvector ;interpolation fitting

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Tracking Multipath Structures in Shallow Water Acoustic Channels using Nonlinear Feature Representations

Keywords: Feature Representation; Channel Estimation

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Underwater Acoustic Echo Time-Frequency Feature Extraction and Reconstruction using Second-order Synchrosqueezing Transform

Keywords: Underwater Acoustic; Echo reconstuction; time-frequency analysis; Second-order Synchrosqueezing Transform

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Underwater Long Baseline Localization based on Doppler Measurements for a Fast-Moving Underwater Vehicle

Keywords: Localization, Long Baseline (LBL), Doppler, Underwater

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Underwater Signal Denoising Using Deep Learning Approach

Keywords: Acoustic signal denoising; Deep learning; Self-supervised learning

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Underwater acoustic positioning using orbital angular momentum vortex beams

Keywords: phased uniform circular array; underwater acoustic positioning; orbital angular momentum; acoustic vortex

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Using Generalised Self-Organizing Maps as Part of Underwater Localisation for Quay Wall Inspections

Keywords: AUVs, Inspections, Quay Walls, Security, Self-Organizing Maps, Underwater Localisation

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