# IEEE Journal of Oceanic Engineering

## Issue 1 • Jan. 2019

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## Filter Results

Displaying Results 1 - 23 of 23

Publication Year: 2019, Page(s):C1 - C4
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• ### Editorial Underwater Acoustic Communications: Where We Stand and What Is Next?

Publication Year: 2019, Page(s):1 - 6
| PDF (398 KB) | HTML
• ### Experimental Evaluation of Supervisory Switching Control for Unmanned Surface Vehicles

Publication Year: 2019, Page(s):7 - 28
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In this paper, a method of incorporating multiobjective controller selection into a closed-loop control system is presented and validated using a full-sized unmanned surface vehicle. Three controllers are utilized to capture three “behaviors” representative of typical maneuvers that would be performed in a port environment: 1) a nonlinear controller for transiting between locations using an undera... View full abstract»

• ### Double-Loop Integral Terminal Sliding Mode Tracking Control for UUVs With Adaptive Dynamic Compensation of Uncertainties and Disturbances

Publication Year: 2019, Page(s):29 - 53
Cited by:  Papers (3)
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This paper focuses on the trajectory tracking control of unmanned underwater vehicles (UUVs) in the presence of dynamic uncertainties and time-varying external disturbances. Two adaptive integral terminal sliding mode control schemes, namely, adaptive integral terminal sliding mode control (AITSMC) scheme and adaptive fast integral terminal sliding mode control (AFITSMC) scheme are proposed for UU... View full abstract»

• ### Motion Control of a Hovering Biomimetic Four-Fin Underwater Robot

Publication Year: 2019, Page(s):54 - 71
Cited by:  Papers (1)
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U-CAT is a highly maneuverable biomimetic four-fin underwater robot for operating in confined spaces. Because of its novel mechanical design and specialized purpose, the traditional autonomous underwater robot control methods are not directly applicable on U-CAT. This paper proposes a novel modular control architecture that can be adopted for different application scenarios. Within this framework,... View full abstract»

• ### Hydropod: An Onboard Deployed Acoustic–Visual Device for Propeller Cavitation and Noise Investigations

Publication Year: 2019, Page(s):72 - 86
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Conducting noise trials with big merchant vessels could constitute serious economic and time losses for the ship operators. This study aims to introduce an experimental acoustic-visual device enabling economical and cost-effective noise trials in full scale. Noise emission and dynamics of propeller cavitation are investigated on a research vessel equipped with a customized submerged device called ... View full abstract»

• ### Ocean Floor Observation and Bathymetry System (OFOBS): A New Towed Camera/Sonar System for Deep-Sea Habitat Surveys

Publication Year: 2019, Page(s):87 - 99
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Towed camera systems are commonly used to collect photo and video images of the deep seafloor for a wide variety of purposes, from pure exploratory research to the development of management plans. Ongoing technological developments are increasing the quantity and quality of data collected from the deep seafloor. Despite these improvements, the area of seafloor, which towed systems can survey, opti... View full abstract»

• ### A Decision Support System to Ease Operator Overload in Multibeam Passive Sonar

Publication Year: 2019, Page(s):100 - 110
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Creating human-informative signal processing systems for the underwater acoustic environment that do not generate operator cognitive saturation and overload is a major challenge. To alleviate cognitive operator overload, we present a visual analytics methodology in which multiple beam-formed sonar returns are mapped to an optimized 2-D visual representation, which preserves the relevant data struc... View full abstract»

• ### Fusion of Swath Bathymetric Data: Application to AUV Rapid Environment Assessment

Publication Year: 2019, Page(s):111 - 120
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Building an accurate and large digital terrain model (DTM) of the seabed is a key issue in various applications, especially for covert rapid environment assessment using autonomous underwater vehicles (AUVs). New AUV generations are capable of acquiring bathymetry with multiple acoustic sensors: single-beam echosounder, Doppler velocity log, multibeam echosounder (MBES), interferometric sidescan s... View full abstract»

• ### Deep Image Representations for Coral Image Classification

Publication Year: 2019, Page(s):121 - 131
Cited by:  Papers (1)
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Healthy coral reefs play a vital role in maintaining biodiversity in tropical marine ecosystems. Remote imaging techniques have facilitated the scientific investigations of these intricate ecosystems, particularly at depths beyond 10 m where SCUBA diving techniques are not time or cost efficient. With millions of digital images of the seafloor collected using remotely operated vehicles and autonom... View full abstract»

• ### Automatic Seagrass Disturbance Pattern Identification on Sonar Images

Publication Year: 2019, Page(s):132 - 141
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Natural and anthropogenic disturbances are causing degradation and loss of seagrass cover, often in the form of bare patches (potholes) and propeller-scaring from vessels. Degradation of seagrass habitat has increased significantly in recent years with losses totaling some 110 km2 per year. With seagrass habitat disappearing at historically unprecedented rates, development of new tools ... View full abstract»

• ### Performance of Multibeam Echosounder Backscatter-Based Classification for Monitoring Sediment Distributions Using Multitemporal Large-Scale Ocean Data Sets

Publication Year: 2019, Page(s):142 - 155
Cited by:  Papers (4)
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Obtaining an overview of the spatial and temporal distribution of seabed sediments is of high interest for multiple research disciplines. Multibeam echosounders allow for the mapping of seabed sediments with high area coverage. In this paper, the repeatability of acoustic classification derived from multibeam echosounder backscatter is addressed. To this end, multibeam echosounder backscatter data... View full abstract»

• ### Performance Analysis of Superdirectivity of Circular Arrays and Implications for Sonar Systems

Publication Year: 2019, Page(s):156 - 166
Cited by:  Papers (1)
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Superdirective beamforming (SDB) has received a lot of interest recently since by this technique a small circular array, i.e., small $ka$, where $a$ is the radius and $k$ is the wave numb... View full abstract»

• ### Rational-Orthogonal-Wavelet-Based Active Sonar Pulse and Detector Design

Publication Year: 2019, Page(s):167 - 178
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A family of rational orthogonal wavelets is explored in active sonar detection to achieve Doppler robustness and noise mitigation. The broadband active sonar system is classified as wavelet-based noncoherent subband energy detection. It features a flexible broadband sonar pulse design with low peak-to-average power ratio (PAPR), and a detector of low computation complexity via fast rational wavele... View full abstract»

• ### Acoustic Pressure and Particle Velocity for Spatial Filtering of Bottom Arrivals

Publication Year: 2019, Page(s):179 - 192
Cited by:  Papers (1)
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This paper discusses the advantages of using a combination of acoustic pressure and particle velocity motion for filtering bottom arrivals. A possible area of application is reflection seismology where, traditionally, the seismic image is extracted from the bottom-reflected broadband acoustic signals received on hydrophones. Since hydrophones are omnidirectional in nature, the received bottom retu... View full abstract»

• ### Performance Analysis of Single-Receiver Matched-Mode Localization

Publication Year: 2019, Page(s):193 - 206
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Acoustic propagation in shallow water at low frequency is characterized by a few propagating modes. When the source is impulsive or short enough, the modes can be extracted from the signal received on a single sensor using a warping operator. This opens the door to single-receiver matched-mode processing (SR-MMP) as a means to estimate source location and/or ocean environmental parameters. While t... View full abstract»

• ### Localizing Snapping Shrimp Noise Using a Small-Aperture Array

Publication Year: 2019, Page(s):207 - 219
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In warm shallow waters, one can consistently hear the crackling sound due to snapping shrimp. An individual sound or “snap” is highly impulsive. Knowing the source locations of these snaps facilitates the development of some unique passive sensing applications. One common approach in localizing these snaps is to calculate the time difference of arrival (TDoA) of snaps across sensors of an array. F... View full abstract»

• ### Sound-Source Localization in Range-Dependent Shallow-Water Environments Using a Four-Layer Model

Publication Year: 2019, Page(s):220 - 228
Cited by:  Papers (1)
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Sound-source localization in shallow water is a difficult task due to the complicated environment, e.g., complex sound-speed profile and irregular water bottom reflections. Full-wave numerical techniques are currently able to accurately simulate the propagation of sound waves in such complex environments. However, the source localization problem, which generally involves a large number of sound pr... View full abstract»

• ### Highly Directional Multipath Free High Data-Rate Communications With a Reconfigurable Modem

Publication Year: 2019, Page(s):229 - 239
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This paper presents a high data-rate underwater acoustic communication system that does not rely on large, powerful, and computationally complex modems. Our small size, weight, and power system is a reconfigurable acoustic modem platform (RAMP) that exploits transducer directivity to reduce the effects of multipath and mutual interference, thus eliminating the need for a traditional channel equali... View full abstract»

• ### Iterative Per-Vector Equalization for Orthogonal Signal-Division Multiplexing Over Time-Varying Underwater Acoustic Channels

Publication Year: 2019, Page(s):240 - 255
Cited by:  Papers (3)
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Orthogonal signal-division multiplexing (OSDM) is a promising modulation scheme that provides a generalized framework to unify orthogonal frequency-division multiplexing (OFDM) and single-carrier frequency-domain equalization. By partitioning each data block into vectors, it allows for a flexible configuration to trade off resource management flexibility with peak-to-average power ratio. In this p... View full abstract»

• ### Preamble Detection for Underwater Acoustic Communications Based on Sparse Channel Identification

Publication Year: 2019, Page(s):256 - 268
Cited by:  Papers (2)
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Preamble detection before data transmission is an important module for an underwater communication system, since false detections would bring undesirable consequences in terms of the lifetime and coexistence of underwater networks. This paper conducts a thorough investigation of preamble detection in adverse underwater acoustic channels in the presence of various external interference, such as nar... View full abstract»

• ### A Simple Frequency-Domain Negative Acknowledgment Feedback for Automatic Repeat on reQuest Underwater Acoustic Networks

Publication Year: 2019, Page(s):269 - 281
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Bidirectional underwater acoustic communications usually request the transmission of some control information among nodes to govern the data flow. Control signaling, employed as frame reception validation, is also a peculiarity of the Automatic Repeat on reQuest (ARQ) schemes. An alternative solution to the error control problem is using forward error correction, even though high redundancy is nee... View full abstract»

• ### Special Issue on Underwater Communications and Networking 2018 (UComms18)

Publication Year: 2019, Page(s): 282
| PDF (161 KB)

## Aims & Scope

The IEEE Journal of Oceanic Engineering (ISSN 0364-9059) is the online-only quarterly publication of the IEEE Oceanic Engineering Society (IEEE OES). The scope of the Journal is the field of interest of the IEEE OES, which encompasses all aspects of science, engineering, and technology that address research, development, and operations pertaining to all bodies of water. This includes the creation of new capabilities and technologies from concept design through prototypes, testing, and operational systems to sense, explore, understand, develop, use, and responsibly manage natural resources.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Mandar Chitre
Acoustic Research Laboratory
National University of Singapore