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Digital Underwater Acoustic Communications

Digital Underwater Acoustic Communications Book
Author : Lufen Xu,Tianzeng Xu
Publisher : Academic Press
Release : 2016-09-16
ISBN : 0128030291
Language : En, Es, Fr & De

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Book Description :

Digital Underwater Acoustic Communications focuses on describing the differences between underwater acoustic communication channels and radio channels, discusses loss of transmitted sound in underwater acoustic channels, describes digital underwater acoustic communication signal processing, and provides a comprehensive reference to digital underwater acoustic communication equipment. This book is designed to serve as a reference for postgraduate students and practicing engineers involved in the design and analysis of underwater acoustic communications systems as well as for engineers involved in underwater acoustic engineering. Introduces the basics of underwater acoustics, along with the advanced functionalities needed to achieve reliable communications in underwater environment Identifies challenges in underwater acoustic channels relative to radio channels, underwater acoustic propagation, and solutions Shows how multi-path structures can be thought of as time diversity signals Presents a new, robust signal processing system, and an advanced FH-SS system for multimedia underwater acoustic communications with moderate communication ranges (above 20km) and rates (above 600bps) Describes the APNFM system for underwater acoustic communication equipment (including both civil and military applications), to be employed in active sonar to improve its performance

Digital Underwater Acoustic Communications

Digital Underwater Acoustic Communications Book
Author : 许天增,许鹭芬
Publisher : Unknown
Release : 2016
ISBN : 9787502795580
Language : En, Es, Fr & De

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Book Description :

Download Digital Underwater Acoustic Communications book written by 许天增,许鹭芬, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Underwater Acoustic Digital Signal Processing and Communication Systems

Underwater Acoustic Digital Signal Processing and Communication Systems Book
Author : Robert Istepanian,Milica Stojanovic
Publisher : Springer Science & Business Media
Release : 2013-03-09
ISBN : 1475736177
Language : En, Es, Fr & De

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Book Description :

Underwater acoustic digital signal processing and communications is an area of applied research that has witnessed major advances over the past decade. Rapid developments in this area were made possible by the use of powerful digital signal processors (DSPs) whose speed, computational power and portability allowed efficient implementation of complex signal processing algorithms and experimental demonstration of their performance in a variety of underwater environments. The early results served as a motivation for the development of new and improved signal processing methods for underwater applications, which today range from classical of autonomous underwater vehicles and sonar signal processing, to remote control underwater wireless communications. This book presents the diverse areas of underwater acoustic signal processing and communication systems through a collection of contributions from prominent researchers in these areas. Their results, both new and those published over the past few years, have been assembled to provide what we hope is a comprehensive overview of the recent developments in the field. The book is intended for a general audience of researchers, engineers and students working in the areas of underwater acoustic signal processing. It requires the reader to have a basic understanding of the digital signal processing concepts. Each topic is treated from a theoretical perspective, followed by practical implementation details. We hope that the book can serve both as a study text and an academic reference.

High rate Digital Acoustic Communications in a Shallow Water Channel

High rate Digital Acoustic Communications in a Shallow Water Channel Book
Author : Young-Hoon Yoon
Publisher : Unknown
Release : 1999
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

The subject of this dissertation is coherent digital acoustic communication in the underwater environment. The objective of the research is to develop algorithms for reliable communication in the shallow underwater channel. Investigation is focused on channel depth less than 100 m and distances between transmitter and receiver from 5 km to 50 km. Based on the characteristics of the underwater acoustic channel and using a conventional approach, the achievable transmission range and the required acoustic power is determined for given channel conditions and system parameters. A channel model suitable for the investigation of shallow water communication is developed which takes into account transmitter-receiver geometry, environmental conditions and system parameters. The model is based on multiple reflections in the channel with weightings according to signal attenuation due to spreading, reflection losses and absorption. Time-variability is introduced by incorporating Doppler frequency shifts due to transmitter/receiver motion. A new method of evaluating performance of a system operating in such multipath conditions is proposed by introduction of a signal-to-multipath ratio (SMR), which is a measure of intersymbol interference (ISI) caused by the multipath. The SMR allows assessment of system performance for various receiver/transmitter positions and channel parameters. It can be used, for instance, to find the transmitter/receiver depth for optimum transmission. A suitable equalizer can improve a SMR. For example, a decision feedback equalizer (DFE) using a least mean square (LMS) and fast optimized LMS criterion is effective in coping with ISI as demonstrated by computer simulations. Hardware complexities of several equalizer algorithms are investigated for a selected channel. The performance degradation due to the presence of Gaussian noise in addition to multipath is analyzed by simulation. A novel structure of an equalizer suitable for the time-variant underwater acoustic channel is proposed. By adaptively adjusting the number of equalizer taps depending on the channel condition, the proposed structure offers reduced hardware complexity. Computer simulations demonstrate the effectiveness of this approach. It is anticipated that the results of this work will find application in the design of high data rate transmission systems for ocean bottom instrumentation, the design of telemetry for autonomous underwater vehicles, and others.

Digital Sonar Design in Underwater Acoustics

Digital Sonar Design in Underwater Acoustics Book
Author : Qihu Li
Publisher : Springer Science & Business Media
Release : 2012-03-05
ISBN : 3642182909
Language : En, Es, Fr & De

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Book Description :

"Digital Sonar Design in Underwater Acoustics Principles and Applications" provides comprehensive and up-to-date coverage of research on sonar design, including the basic theory and techniques of digital signal processing, basic concept of information theory, ocean acoustics, underwater acoustic signal propagation theory, and underwater signal processing theory. This book discusses the general design procedure and approaches to implementation, the design method, system simulation theory and techniques, sonar tests in the laboratory, lake and sea, and practical validation criteria and methods for digital sonar design. It is intended for researchers in the fields of underwater signal processing and sonar design, and also for navy officers and ocean explorers. Qihu Li is a professor at the Institute of Acoustics, Chinese Academy of Sciences, and an academician of the Chinese Academy of Sciences.

Underwater Acoustic Voice Communications Using Digital Techniques

Underwater Acoustic Voice Communications Using Digital Techniques Book
Author : Hayri Sari
Publisher : Unknown
Release : 1997
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Underwater Acoustic Voice Communications Using Digital Techniques book written by Hayri Sari, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Underwater Acoustics

Underwater Acoustics Book
Author : Salah Bourennane
Publisher : BoD – Books on Demand
Release : 2012-03-28
ISBN : 9535104411
Language : En, Es, Fr & De

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Book Description :

The field of acoustic engineering has many various potential applications, such as in ocean science research and homeland security. This book provides cutting-edge knowledge in current techniques and technologies, such as the adaptive technique for underwater communication, array processing and the CI/OFDM system. One chapter takes inspiration from the natural world in proposing a new bio-inspired ranging approach for resolution purposes. Technologies such as high-resolution array processing methods can also be used to locate underwater objects in sediment, as one chapter shows. Finally, two contributions cover the applications of narrowband interference suppression and iterative equalization, and decoding schemes. Given the scope of the book, it will be required reading for researchers and engineers in the field.

Underwater Wireless Communications

Underwater Wireless Communications Book
Author : M. Stojanovic
Publisher : Wiley-Interscience
Release : 2014-05-30
ISBN : 9780470230541
Language : En, Es, Fr & De

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Book Description :

Underwater acoustics is an important area of research, and this is the first book to date that describes the signal processing aspects of the field. Written by the pre-eminent authority on underwater acoustic communications, this text spans topics from acoustic channel modeling to signal processing, and network solutions for channel sharing among different users. This approach offers a self-contained subject treatment to practicing engineers, students, and researchers with a basic background in digital communications.

Underwater Acoustics and Ocean Dynamics

Underwater Acoustics and Ocean Dynamics Book
Author : Lisheng Zhou,Wen Xu,Qianliu Cheng,Hangfang Zhao
Publisher : Springer
Release : 2016-10-17
ISBN : 9811024227
Language : En, Es, Fr & De

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Book Description :

These proceedings are a collection of 16 selected scientific papers and reviews by distinguished international experts that were presented at the 4th Pacific Rim Underwater Acoustics Conference (PRUAC), held in Hangzhou, China in October 2013. The topics discussed at the conference include internal wave observation and prediction; environmental uncertainty and coupling to sound propagation; environmental noise and ocean dynamics; dynamic modeling in acoustic fields; acoustic tomography and ocean parameter estimation; time reversal and matched field processing; underwater acoustic localization and communication as well as measurement instrumentations and platforms. These proceedings provide insights into the latest developments in underwater acoustics, promoting the exchange of ideas for the benefit of future research.

Mobile and Wireless Technologies 2017

Mobile and Wireless Technologies 2017 Book
Author : Kuinam J. Kim,Nikolai Joukov
Publisher : Springer
Release : 2017-06-14
ISBN : 9811052816
Language : En, Es, Fr & De

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Book Description :

This book gathers the proceedings of the 4th International Conference on Mobile and Wireless Technology (ICMWT), held in Kuala Lumpur, Malaysia in June 2017, an event that provides researchers and practitioners from both academia and industry with a platform to keep them abreast of cutting-edge developments in the field. The peer-reviewed and accepted papers presented here address topics in a number of major areas: Mobile, Wireless Networks and Applications; Security in Mobile and Wireless; Mobile Data Management and Applications; Mobile Software; Multimedia Communications; Wireless Communications; and Services, Application and Business.

Underwater Communications and Networks

Underwater Communications and Networks Book
Author : Yi Lou
Publisher : Springer Nature
Release : 2022-01-21
ISBN : 3030866491
Language : En, Es, Fr & De

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Book Description :

Download Underwater Communications and Networks book written by Yi Lou, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

MURI Impact of Oceanographic Variability on Acoustic Communications

MURI  Impact of Oceanographic Variability on Acoustic Communications Book
Author : Anonim
Publisher : Unknown
Release : 2009
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Couple together analytical and numerical modeling of oceanographic and surface wave processes, acoustic propagation modeling, statistical descriptions of the waveguide impulse response between multiple sources and receivers, and the design and performance characterization of underwater acoustic digital data communication systems in shallow water.

Advances inUnderwater Acoustics

Advances inUnderwater Acoustics Book
Author : Andrzej Zak
Publisher : BoD – Books on Demand
Release : 2017-11-22
ISBN : 9535136097
Language : En, Es, Fr & De

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Book Description :

Underwater acoustics, despite the relatively short history, has already found practical application in many areas of human activity. It allows, among others, depth research, data transmission, and underwater observation and provides maritime transport safety and security against terrorists. Moreover, underwater acoustic technologies are also widely used in medicine, biology, and many other fields. Therefore, it is one of the most developing areas. This book is a collection of experiences of scientists from around the world engaged in research, design, and construction, as well as the daily use of underwater acoustic systems. Giving this book in the hands of the reader, we hope that it will be a treasure trove of knowledge and inspiration for further research in the field of underwater acoustics.

Cognitive Underwater Acoustic Networking Techniques

Cognitive Underwater Acoustic Networking Techniques Book
Author : Dimitri Sotnik,Michael Goetz,Ivor Nissen
Publisher : Springer Nature
Release : 2020-09-29
ISBN : 3662616580
Language : En, Es, Fr & De

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Book Description :

This book summarizes the latest research on cognitive network-layer methods and smart adaptive physical-layer methods in underwater networks. Underwater communication requires extendable and delay-tolerant underwater acoustic networks capable of supporting multiple frequency bands, data rates and transmission ranges. The book also discusses a suitable foreground communication stack for mixed mobile/static networks, a technology that requires adaptive physical layer waveforms and cognitive network strategies with underlying cooperative and non-cooperative robust processes. The goal is to arrive at a universally applicable standard in the area of Underwater Internet-of-Things [ISO/IEC 30140, 30142, 30143]. The book is the second spin-off of the research project RACUN, after the first RACUN-book "Underwater Acoustic Networking Techniques" (https://link.springer.com/book/10.1007%2F978-3-642-25224-2)

Proceedings of the International Computer Conference 2006 on Wavelet Active Media Technology and Information Processing

Proceedings of the International Computer Conference 2006 on Wavelet Active Media Technology and Information Processing Book
Author : Jian Ping Li
Publisher : World Scientific
Release : 2006-01-01
ISBN : 9812709991
Language : En, Es, Fr & De

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Book Description :

Download Proceedings of the International Computer Conference 2006 on Wavelet Active Media Technology and Information Processing book written by Jian Ping Li, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Springer Handbook of Ocean Engineering

Springer Handbook of Ocean Engineering Book
Author : Manhar R. Dhanak,Nikolaos I. Xiros
Publisher : Springer
Release : 2016-07-23
ISBN : 3319166492
Language : En, Es, Fr & De

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Book Description :

This handbook is the definitive reference for the interdisciplinary field that is ocean engineering. It integrates the coverage of fundamental and applied material and encompasses a diverse spectrum of systems, concepts and operations in the maritime environment, as well as providing a comprehensive update on contemporary, leading-edge ocean technologies. Coverage includes an overview on the fundamentals of ocean science, ocean signals and instrumentation, coastal structures, developments in ocean energy technologies and ocean vehicles and automation. It aims at practitioners in a range of offshore industries and naval establishments as well as academic researchers and graduate students in ocean, coastal, offshore and marine engineering and naval architecture. The Springer Handbook of Ocean Engineering is organized in five parts: Part A: Fundamentals, Part B: Autonomous Ocean Vehicles, Subsystems and Control, Part C: Coastal Design, Part D: Offshore Technologies, Part E: Energy Conversion

Underwater Acoustic Sensor Networks

Underwater Acoustic Sensor Networks Book
Author : Yang Xiao
Publisher : CRC Press
Release : 2010-05-19
ISBN : 9781420067125
Language : En, Es, Fr & De

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Book Description :

A detailed review of underwater channel characteristics, Underwater Acoustic Sensor Networks investigates the fundamental aspects of underwater communication. Prominent researchers from around the world consider contemporary challenges in the development of underwater acoustic sensor networks (UW-ASNs) and introduce a cross-layer approach for effective integration of all communication functionalities. Discussing architectures for two- and three-dimensional sensor networks, this authoritative resource clearly delineates the main differences between terrestrial and underwater sensor networks—covering the wide range of topics related to UW-ASNs. It examines efficient distributed routing algorithms for delay-insensitive and delay-sensitive applications and introduces a realistic acoustic model characterized by channel utilization efficiency that enables proper setting of the optimal packet size for underwater communication. It also: Provides efficient sensor communication protocols for the underwater environment Addresses the topology control problem for sparse and dense 3D networks Presents a novel distributed MAC protocol that incorporates a unique closed-loop distributed algorithm for setting the optimal transmit power and code length The book includes coverage of routing, fault tolerance, time synchronization, optimal clustering, medium access control, software, hardware, and channel modeling. Exploring the need to design an energy-efficient cross-layer protocol suite, this resource provides the understanding required to achieve high-performance channel access, routing, event transport reliability, and data flow control with underwater acoustic sensors.

Underwater Position fixing Using Digital Acoustic Communication Techniques

Underwater Position fixing Using Digital Acoustic Communication Techniques Book
Author : Darryl Newborough,University of Loughborough
Publisher : Unknown
Release : 2002
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Underwater Position fixing Using Digital Acoustic Communication Techniques book written by Darryl Newborough,University of Loughborough, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.