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Digital Underwater Acoustic Communications

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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 : Lufeng Xu,Tianzeng Xu
Publisher : Academic Press
Release : 2016-09-08
ISBN : 9780128030097
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 environmentIdentifies challenges in underwater acoustic channels relative to radio channels, underwater acoustic propagation, and solutionsShows how multi-path structures can be thought of as time diversity signalsPresents 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

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.

OFDM for Underwater Acoustic Communications

OFDM for Underwater Acoustic Communications Book
Author : Sheng Zhou,Zhaohui Wang
Publisher : John Wiley & Sons
Release : 2014-03-21
ISBN : 1118693817
Language : En, Es, Fr & De

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Book Description :

A blend of introductory material and advanced signal processing and communication techniques, of critical importance to underwater system and network development This book, which is the first to describe the processing techniques central to underwater OFDM, is arranged into four distinct sections: First, it describes the characteristics of underwater acoustic channels, and stresses the difference from wireless radio channels. Then it goes over the basics of OFDM and channel coding. The second part starts with an overview of the OFDM receiver, and develops various modules for the receiver design in systems with single or multiple transmitters. This is the main body of the book. Extensive experimental data sets are used to verify the receiver performance. In the third part, the authors discuss applications of the OFDM receiver in i) deep water channels, which may contain very long separated multipath clusters, ii) interference-rich environments, where an unintentional interference such as Sonar will be present, and iii) a network with multiple users where both non-cooperative and cooperative underwater communications are developed. Lastly, it describes the development of a positioning system with OFDM waveforms, and the progress on the OFDM modem development. Closely related industries include the development and manufacturing of autonomous underwater vehicles (AUVs) and scientific sensory equipment. AUVs and sensors in the future could integrate modems, based on the OFDM technology described in this book. Contents includes: Underwater acoustic channel characteristics/OFDM basics/Peak-to-average-ratio control/Detection and Doppler estimation (Doppler scale and CFO)/Channel estimation and noise estimation/A block-by-block progressive receiver and performance results/Extensions to multi-input multi-output OFDM/Receiver designs for multiple users/Cooperative underwater OFDM (Physical layer network coding and dynamic coded cooperation)/Localization with OFDM waveforms/Modem developments A valuable resource for Graduate and postgraduate students on electrical engineering or physics courses; electrical engineers, underwater acousticians, communications engineers

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 : 2002-08-31
ISBN : 9780792373049
Language : En, Es, Fr & De

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Book Description :

This work describes design and development methodologies in underwater acoustic signal processing. The emphasis is on the implementation and experimental issues such as use of modern (DSP) systems and special hardware realizations. The book assembles a number of contributions dealing with different underwater acoustic signal processing applications. Topics covered include: array processing for detection and localization; matched-field processing; speech coding and transmission for divers; underwater biotelemetry; signal processing for underwater communications (telemetry); communication channel modelling; equalization for underwater high speed communications and neural networks in underwater signal processing.

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 Communications and Networks

Underwater Communications and Networks Book
Author : Yi Lou,Niaz Ahmed
Publisher : Springer Nature
Release : 2021-11-15
ISBN : 3030866491
Language : En, Es, Fr & De

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Book Description :

This textbook covers all related communication technologies of underwater wireless communication, such as acoustic communication, optical communication, and magneto-inductive communication. After describing each technology, the authors relay their pros and cons, as it is essential to learn the underlying mechanism, advancements, and limitations of these techniques. Therefore, this book provides basics fundamentals of the three technologies, their advantages and disadvantages, and their applications. The authors also introduce research trends, pointing readers in the direction of research in the field of underwater wireless communication. The book is an essential textbook for undergraduate and graduate students in the field of underwater communications. The book is also useful as a reference to undergraduate engineering students, science students, and practicing engineers. The book includes end-of-chapter questions and numerical problems.

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.

Design and Development of Underwater Acoustic Modem for Shallow Waters and Short Range Communication

Design and Development of Underwater Acoustic Modem for Shallow Waters and Short Range Communication Book
Author : Vinay Divakar
Publisher : GRIN Verlag
Release : 2014-09-05
ISBN : 3656735344
Language : En, Es, Fr & De

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Book Description :

Master's Thesis from the year 2014 in the subject Engineering - Naval Engineering, Ocean Engineering, , course: Electronics Systems Design, language: English, abstract: The existing underwater acoustic modems are designed for deep oceans and long range communication leading to immense consumption of power and high cost. These long range underwater acoustic modems are not suitable choice for deployment in underwater sensor networks, Hence the problem was chosen to design and develop a underwater acoustic modems that operates in shallow waters of depth below 100m and for a short range of below 100 m. Underwater wireless sensor network is contemporary technology that can be applied in the fields of security, surveillance, military, commercial, industrial and environmental. The major drawback is that the traditional underwater acoustic modems cannot be deployed for underwater sensor networks. This work focusses on the research and development of the underwater acoustic modem for shallow waters and short range communication. The relevant background theory required understand acoustics and for modelling the unique characteristics of the underwater channel is described in detail. Different concepts to model and implement the functionalities of the transmitter and receiver were explored, while converging to the most suitable choice of concepts. The modelled system is simulated for different channel conditions such as depth, range and induced ambient noise. The results were analysed in order to conclude the performance outcome of the system. The modelled system can efficiently operate for a depth of 30m, 50m and 70m for a range up to 50m. The hardware was developed using minimum number of components as a proof of concept for efficient data transmission and reception using acoustic signals. The hardware was tested to operate efficiently in air, however hardware tests for underwater is suggested for future work, which will provide much better performance since acoustics is more suitable for communication in water than air.

Digital Communications and Signal Processing Second Edition

Digital Communications and Signal Processing  Second Edition  Book
Author : Ke Vāsudēvan
Publisher : Universities Press
Release : 2010
ISBN : 8173717109
Language : En, Es, Fr & De

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Book Description :

Download Digital Communications and Signal Processing Second Edition book written by Ke Vāsudēvan, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

2018 Fourth Underwater Communications and Networking Conference UComms

2018 Fourth Underwater Communications and Networking Conference  UComms  Book
Author : Anonim
Publisher : Unknown
Release : 2018
ISBN : 9781538664421
Language : En, Es, Fr & De

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Book Description :

Download 2018 Fourth Underwater Communications and Networking Conference UComms book written by , available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Sonar and Underwater Acoustics

Sonar and Underwater Acoustics Book
Author : Jean-Paul Marage,Yvon Mori
Publisher : John Wiley & Sons
Release : 2013-02-07
ISBN : 1118600657
Language : En, Es, Fr & De

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Book Description :

Sonar and Underwater Acoustics brings together all the concepts necessary for designers and users of sonar systems. Unlike other books on this subject, which are often too specialized, this book is accessible to a wider audience. The first part focuses on the acoustic environment, antenna structures, and electric acoustic interface. The latter provides knowledge required to design, as well as the development and implementation of chain processes for an active sonar from the conditioning input to output processing. The reader will find a comprehensive range of all problems encountered in underwater acoustics for a sonar application, from physical phenomena governing the environment and the corresponding constraints, through to the technical definition of transducers and antennas, and the types of signal processing involved. In one section, measures in underwater acoustics are also proposed.

Fundamentals of Ocean Acoustics

Fundamentals of Ocean Acoustics Book
Author : L. Brekhovskikh,Y. Lysanov
Publisher : Springer Science & Business Media
Release : 2013-03-14
ISBN : 3662023423
Language : En, Es, Fr & De

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Book Description :

The continents of our planet have already been exploited to a great extent. Therefore man is turning his sight to the vast spaciousness of the ocean whose resources - mineral, biological, energetic, and others - are just beginning to be used. The ocean is being intensively studied. Our notions about the dynam ics of ocean waters and their role in forming the Earth's climate as well as about the structure of the ocean bottom have substantially changed during the last two decades. An outstanding part in this accelerated exploration of the ocean is played by ocean acoustics. Only sound waves can propagate in water over large distances. Practically all kinds of telemetry, communication, location, and re mote sensing of water masses and the ocean bottom use sound waves. Propa gating over thousands of kilometers in the ocean, they bring information on earthquakes, eruptions of volcanoes, and distant storms. Projects using acoustical tomography systems for exploration of the ocean are presently be ing developed. Each of these systems will allow us to determine the three-di mensional structure of water masses in regions as large as millions of square kilometers.

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.

Applied Underwater Acoustics

Applied Underwater Acoustics Book
Author : Thomas Neighbors,David Bradley
Publisher : Elsevier
Release : 2017-01-19
ISBN : 0128112476
Language : En, Es, Fr & De

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Book Description :

Applied Underwater Acoustics meets the needs of scientists and engineers working in underwater acoustics and graduate students solving problems in, and preparing theses on, topics in underwater acoustics. The book is structured to provide the basis for rapidly assimilating the essential underwater acoustic knowledge base for practical application to daily research and analysis. Each chapter of the book is self-supporting and focuses on a single topic and its relation to underwater acoustics. The chapters start with a brief description of the topic’s physical background, necessary definitions, and a short description of the applications, along with a roadmap to the chapter. The subtopics covered within individual subchapters include most frequently used equations that describe the topic. Equations are not derived, rather, assumptions behind equations and limitations on the applications of each equation are emphasized. Figures, tables, and illustrations related to the sub-topic are presented in an easy-to-use manner, and examples on the use of the equations, including appropriate figures and tables are also included. Provides a complete and up-to-date treatment of all major subjects of underwater acoustics Presents chapters written by recognized experts in their individual field Covers the fundamental knowledge scientists and engineers need to solve problems in underwater acoustics Illuminates, in shorter sub-chapters, the modern applications of underwater acoustics that are described in worked examples Demands no prior knowledge of underwater acoustics, and the physical principles and mathematics are designed to be readily understood by scientists, engineers, and graduate students of underwater acoustics Includes a comprehensive list of literature references for each chapter

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.

Underwater Acoustic Modeling and Simulation

Underwater Acoustic Modeling and Simulation Book
Author : Paul C. Etter
Publisher : CRC Press
Release : 2017-12-19
ISBN : 1466564946
Language : En, Es, Fr & De

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Book Description :

Underwater Acoustic Modeling and Simulation, Fourth Edition continues to provide the most authoritative overview of currently available propagation, noise, reverberation, and sonar-performance models. This fourth edition of a bestseller discusses the fundamental processes involved in simulating the performance of underwater acoustic systems and emphasizes the importance of applying the proper modeling resources to simulate the behavior of sound in virtual ocean environments. New to the Fourth Edition Extensive new material that addresses recent advances in inverse techniques and marine-mammal protection Problem sets in each chapter Updated and expanded inventories of available models Designed for readers with an understanding of underwater acoustics but who are unfamiliar with the various aspects of modeling, the book includes sufficient mathematical derivations to demonstrate model formulations and provides guidelines for selecting and using the models. Examples of each type of model illustrate model formulations, model assumptions, and algorithm efficiency. Simulation case studies are also included to demonstrate practical applications. Providing a thorough source of information on modeling resources, this book examines the translation of our physical understanding of sound in the sea into mathematical models that simulate acoustic propagation, noise, and reverberation in the ocean. The text shows how these models are used to predict and diagnose the performance of complex sonar systems operating in the undersea environment.

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.

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.

Springer Handbook of Acoustics

Springer Handbook of Acoustics Book
Author : Thomas Rossing
Publisher : Springer Science & Business Media
Release : 2007-06-21
ISBN : 0387304460
Language : En, Es, Fr & De

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Book Description :

This is an unparalleled modern handbook reflecting the richly interdisciplinary nature of acoustics edited by an acknowledged master in the field. The handbook reviews the most important areas of the subject, with emphasis on current research. The authors of the various chapters are all experts in their fields. Each chapter is richly illustrated with figures and tables. The latest research and applications are incorporated throughout, including computer recognition and synthesis of speech, physiological acoustics, diagnostic imaging and therapeutic applications and acoustical oceanography. An accompanying CD-ROM contains audio and video files.