Kommunikationsteknik / telekommunikation

""Wireless Telegraphy And Telephony"" is a book written by Domenico Mazzotto in 1906, which provides an in-depth analysis of the technology of wireless communication. The book covers the history, principles, and practical applications of wireless telegraphy and telephony. It explores the science behind the transmission and reception of wireless signals, including the use of electromagnetic waves and the development of radio technology. The author also discusses the various methods of wireless communication, such as Morse code, voice transmission, and telegraphy. The book is a valuable resource for anyone interested in the history and development of wireless communication, and it provides a comprehensive overview of the technology that has revolutionized the way we communicate today.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.

"The Art of Listening to AM Radio: Techniques for Improving Reception" is an indispensable guide for both novice and seasoned AM radio enthusiasts seeking to enhance their listening experience. Written by an expert in the field, this comprehensive book offers a wealth of knowledge and practical advice on how to maximize reception quality, minimize interference, and tune into clearer signals on the AM dial.Drawing on years of experience and expertise, the author covers a wide range of topics, from the fundamentals of AM radio technology to advanced techniques for fine-tuning receivers and optimizing antenna systems. Readers will learn how to navigate the complexities of AM radio propagation, overcome common reception issues, and harness the power of digital tools and technologies to enhance their listening experience.Filled with practical tips, step-by-step instructions, and real-world examples, "The Art of Listening to AM Radio" provides readers with the tools and techniques they need to become more skilled and knowledgeable listeners. Whether you're a casual listener looking to improve your reception quality or a dedicated enthusiast seeking to unlock the full potential of AM radio, this book is your essential companion on the journey to clearer signals and richer listening experiences.With its accessible writing style, informative content, and comprehensive coverage of AM radio technology and techniques, "The Art of Listening to AM Radio" is a must-have resource for anyone passionate about the art and science of radio broadcasting. Whether you're tuning in from your home, your car, or your workshop, this book will help you get the most out of your AM radio listening experience and immerse yourself in the captivating world of AM radio broadcasting.

This book investigates data security approaches in Heterogeneous Communications Networks (HCN). First, the book discusses the urgent need for a decentralized data management architecture in HCN. The book investigates preliminaries and related research to help readers obtain a comprehensive picture of the research topic. Second, the book presents three blockchain-based approaches for data management in HCN: data provenance, data query, and data marketing. Finally, based on the insights and experiences from the presented approaches, the book discusses future research directions.

Getting to Know Mobile GIS empowers readers to creatively use mobile GIS and drive innovation in this fast-advancing field."Mobile-first" and the "post-PC era" aren't just buzzwords; they represent today's reality. Within the GIS industry, the mobile internet and mobile GIS have profoundly transformed how we acquire, visualize, analyze, and disseminate geospatial information. With its ubiquitous use and location-aware capabilities, the mobile platform is an essential part of enterprise GIS across industries, making mobile GIS crucial to the business operations and future success of wide-ranging organizations.Getting to Know Mobile GIS helps GIS professionals and GIS students grasp the opportunities presented by mobile GIS. It provides principles and detailed tutorials to teach today's cutting-edge mobile GIS technologies. Using a no-code, low-code approach, it makes mobile GIS easy and fun to learn. Readers can immediately become productive in creating enterprise GIS solutions, ranging from online and offline spatial data visualization, data collection, location sharing, and workforce coordination to integration with enterprise workflows.Pinde Fu leads the ArcGIS Platform Engineering team at Esri Professional Services and teaches at universities, including Harvard University Extension School. His specialties include web and mobile GIS technologies and applications in various industries. Several of his projects have won special achievement awards. Fu is the author of Getting to Know Web GIS (Esri Press, 2022) and lead author of Web GIS: Principles and Applications (Esri Press, 2010).

This book presents extensive research on the quality of 360° video perceived by users with HMDs. The book aims to develop a set of standard guidelines for the systematic visual quality assessment of 360° videos. Firstly, conventional subjective test methods such as Absolute Category Rating (ACR) and Double Stimulus Impairment Scale (DSIS) are applied to evaluate video quality, alongside the Modified ACR (M-ACR) method newly proposed. Building on the reliability and general applicability of the procedure across different tests, a methodological framework for 360° video quality assessment is then presented. The author also analyzes simulator sickness to investigate the impact of different influencing factors. The insights gained on simulator sickness related to 360° video contribute to a better understanding of this particular use case of VR and can help to improve comfort among users by suggesting improvements in the technical specifications of 360° video and HMD technology and thusimproving QoE.

THE HOW'S AND WHY'S AND APPLICATIONS ON SONET/SDH--MINUS THE JARGON Intended for use in broadband ISDN and ATM networks, SONET (Synchronous Optical Network) and SDH (Synchronous Digital Hierarchy) have taken on a life of their own. As fiber optic cable becomes the standard for data transmission, telcos and other carriers are deploying more high-speed SONET/SDH technologies to support leased-line services such as DS-1 and DS-3. In search of ever-faster data speeds, leading corporations such as Boeing, AT&T, and Disney are moving their private global networks to a SONET/SDH infrastructure. THIS BOOK IS A MUST-READ IF-- * Your're at the point where technology turns to business and shoot-or-pass decisions get made * Staying on top of what's hot in communications is your jo * You need to understand the growth and workings of SONET/SDH, but don't have time for MIT * You want to compare cots, potentials, and performance of SONET/SDH with other technologies * You'd like business-model case studies of DWDM (Dense Wavelength Division Multiplexing) and WDM (Wavelength Division Multiplexing) that make sense * You sell, market, or manage for a firm that develops SONET/SDH systems * You make career choices in telecom, Internet service, networking, or the upper echelons of any large business * You invest in communications equipment makers, service providers, or applications creators * You're a curious technophile who can't get enough insider details on new communications strategies, methods, and trends * You see that there's more sun in the winner's circle than in the also-ran column The easiest way to size up SONET/SDH for your network--or simply tobetter understand these rapidly expanding technologies--SONET/SDH DEMYSTIFIED is the ideal shortcut to the front edge of high-speed networking.

This open access book offers comprehensive, self-contained knowledge on Digital Twin (DT), which is a very promising technology for achieving digital intelligence in the next-generation wireless communications and computing networks. DT is a key technology to connect physical systems and digital spaces in Metaverse.The objectives of this book are to provide the basic concepts of DT, to explore the promising applications of DT integrated with emerging technologies, and to give insights into the possible future directions of DT. For easy understanding, this book also presents several use cases for DT models and applications in different scenarios.The book starts with the basic concepts, models, and network architectures of DT. Then, we present the new opportunities when DT meets edge computing, Blockchain and Artificial Intelligence, anddistributed machine learning (e.g., federated learning, multi-agent deep reinforcement learning). We also present a wide application of DT as an enabling technology for 6G networks, Aerial-Ground Networks, and Unmanned Aerial Vehicles (UAVs).The book allows an easy cross-reference owing to the broad coverage on both the principle and applications of DT. The book is written for people interested in communications and computer networks at all levels. The primary audience includes senior undergraduates, postgraduates, educators, scientists, researchers, developers, engineers, innovators and research strategists.

5G-Netze werden weltweit auf- und ausgebaut. Im Vergleich zu 4G bieten sie nicht nur offensichtliche Vorteile wie höhere Bitraten, sondern hohe Zuverlässigkeit und geringe Latenz, z.B. für Car-to-X-Anwendungen, oder die Einbindung einer sehr hohen Anzahl von Endgeräten, z.B. von Sensoren in einer Smart City. Dieses einzige deutschsprachige Buch zur 5G-Technik beginnt mit der Evolution bei den Mobilfunknetzen hin zu 5G und geht in der Folge auf die Basiskonzepte und -technologien wie NGN, IMS, die Virtualisierung mit NFV und MEC sowie SDN ein. Die besondere Herangehensweise an 5G über Anwendungsfälle und Einsatzszenarien hin zu konkreten Anforderungen sowie die Standardisierung bei ITU und vor allem 3GPP sowie die internationale Regulierung werden aufgezeigt. Breiten Raum nehmen das Design von 5G-Systemen, die 5G-Zugangsnetze inkl. Open-RAN mit ihrer leistungsstarken Übertragungstechnik sowie das Kernnetz mit den innovativen Konzepten der Service Based Architecture und des Network Slicing inkl. Beispielen aus der Netzwerkpraxis ein. Ein 5G-System wird in der Gesamtsicht dargestellt, ergänzt durch einen Blick auf Campusnetze und abgerundet durch einen Überblick über alle relevanten IT Security-Aspekte. Abgeschlossen wird die Gesamtbetrachtung durch einen Blick auf die Umwelteinflüsse durch die elektromagnetische Strahlung, die Energie- und Rohstoffbedarfe sowie das Thema Nachhaltigkeit. Zudem wird die Weiterentwicklung bei 5G beschrieben inkl. eines optimal aufbereiteten Einstiegs in 6G. Hauptziel des Buches ist es, an 5G-Technik und -Anwendungsszenarien interessierten Personen fundiertes 5G-Wissen zu vermitteln und zur weiteren Auseinandersetzung mit diesem Themengebiet anzuregen. Angesprochen sind allgemein technisch Interessierte, speziell Mitarbeitende von öffentlichen und privaten Netzbetreibern. Interesse wird dieses Buch auch in den IT-Abteilungen möglicher 5G-Anwenderfirmen wecken, nicht zuletzt natürlich bei Studierenden der Informatik und Elektrotechnik.

This book constitutes the refereed proceedings of the First EAI International Conference, SmartSP 2023, held in Chicago, USA, during October 12-13, 2023. The 11 revised full papers were carefully reviewed and selected from 24 submissions. The papers focus on all details all technological aspects that are relevant to Security and privacy in cyber-physical systems.

The field of wireless communication has undergone a remarkable transformation over the past few decades, revolutionizing the way we connect and communicate with each other and the world around us. "Principles and Practices of Wireless Communication" seeks to serve as a comprehensive guide to this dynamic and ever-evolving domain, offering an in-depth exploration of the fundamental principles and cutting-edge practices that underpin wireless technology. In an era where wireless communication has become an integral part of our daily lives, from smartphones and Wi-Fi networks to emerging technologies like 5G and the Internet of Things (IoT), understanding the core concepts and best practices is crucial for professionals, students, and enthusiasts alike.This book is designed to be a valuable resource for individuals looking to gain a solid grasp of wireless communication, whether you are an aspiring engineer, a seasoned practitioner, or an academic researcher. With a focus on clarity and accessibility, "Principles and Practices of Wireless Communication" presents a holistic approach, covering topics ranging from the basics of electromagnetic waves and wireless signal propagation to advanced topics like multiple access techniques, channel coding, and network protocols. It aims to bridge the gap between theoretical knowledge and practical application, enabling readers to navigate the complex landscape of wireless technology with confidence and insight. Whether you are seeking a foundational understanding of wireless communication or are interested in the latest developments and emerging trends, this book will serve as your essential companion in the fascinating world of wireless communication.

This book relates the history of the BBC in Aberdeen from its inception in 1923 right up to the present day. This book contains fascinating information about the origin of 'Station 2BD' in Belmont Street. There are interesting profiles of the people and personalities involved. It details the search for new premises and the establishment of the famous Beechgrove Terrace location. It also documents events during WWII, the arrival of television and the local radio years.. Now greatly expanded with more information and fully illustrated with original photographs, 'Aberdeen Calling' is a fascinating look at the BBC in the North East of Scotland.

The book features original papers from International Conference on Cryptology & Network Security with Machine Learning (ICCNSML 2023), organized by PSIT, Kanpur, India during 27¿29 October 2023. This conference proceeding provides the understanding of core concepts of Cryptology and Network Security with ML in data communication. The book covers research papers in public key cryptography, elliptic curve cryptography, post-quantum cryptography, lattice based cryptography, non-commutative ring-based cryptography, cryptocurrency, authentication, key agreement, Hash functions, block/stream ciphers, polynomial-based cryptography, code-based cryptography, NTRU cryptosystems, security and privacy in machine learning, blockchain, IoT security, wireless security protocols, cryptanalysis, number theory, quantum computing, cryptographic aspects of network security, complexity theory, and cryptography with machine learning.

This 2nd edition is an updated, revised and expanded version of the original 2007 text. The figures are now colour and new material has been added to address recent advances in the field. The authors are well known in the antenna measurement world and this remains a unique book covering planar near-field measurements.

Modern wireless communication systems require high data rates to provide acceptable quality of service. However, this poses challenges in the allocation of spectrum, which is a scarce re- source. To overcome this, the Multiple Input Multiple Output (MIMO) con¿guration has been developed, which has excellent spectral e¿ciency and data rates, as proven by mathematical modelling. The major hurdle in wireless communication systems is achieving good isolation between antenna elements while also maintaining a miniaturized structure. Therefore, reducing mutual coupling and signal correlation is essential for better performance. In recent years, there has been a remarkable evolution in satellite systems, leading to enhanced reliability in mobile communication. Initially, satellite performance was constrained, necessitating the use of large ground station antennas and öering only limited services. However, with advancements, satellites have become more robust, capable of delivering a broader spectrum of services with improved quality. Multiple Input Multiple Output (MIMO) has emerged as an important technology for enhancing the e¿ciency and data rates of wireless networks and terrestrial communication standards. Consequently, there is growing interest in employing MIMO techniques in satellite communication systems. However, implementing MIMO in satellite communication poses unique challenges in comparison to the terrestrial domain. As the demand for satellite capacity continues to grow, MIMO has emerged as a promising solution to increase spectral e¿ciency without the need for additional power. The utilization of the spatial domain is the primary source of enhanced channel capacity. Extensive literature exists that provides a comprehensive review of MIMO techniques speci¿cally designed for satellite communication.

This scarce antiquarian book is a facsimile reprint of the original. Due to its age, it may contain imperfections such as marks, notations, marginalia and flawed pages. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions that are true to the original work.

Wireless communication is the backbone of the digitized society, where everything is connected and intelligent. Access points and devices are nowadays equipped with multiple antennas to achieve higher data rates, better reliability, and support more users than in the past. This book gives a gentle introduction to multiple antenna communications with a focus on system modeling, channel capacity theory, algorithms, and practical implications. The basics of wireless localization, radar sensing, and controllable reflection through reconfigurable surfaces are also covered. The goal is to provide the reader with a solid understanding of this transformative technology that changes how wireless networks are designed and operated, today and in the future.The first three chapters cover the fundamentals of wireless channels, and the main benefits of using multiple antennas are identified: beamforming, diversity, and spatial multiplexing. The theory and signal processing algorithms for multiple-input multiple-output (MIMO) communications with antenna arrays at the transmitter and receiver are progressively developed. The next two chapters utilize these results to study point-to-point MIMO channels under line-of-sight (LOS) and non-LOS conditions, covering the shape of signal beams, impact of array geometry, polarization, and ways to achieve reliable communication over fading channels. The book then shifts focus to multi-user MIMO channels, where interference between devices is managed by spatial processing. The next chapter extends the theory to multicarrier channels and explains practical digital, analog, and hybrid hardware implementations. The last two chapters cover the role of multiple antennas in localization and sensing, and how reconfigurable surfaces can improve both communication and sensing systems.The text was developed as the textbook for a university course and builds on the reader's previous knowledge of signals and systems, linear algebra, probability theory, and digital communications. Each chapter contains numerous examples, exercises, and simulation results that can be reproduced using accompanying code. The accompanying code and material is available at https://github.com/emilbjornson/mimobook

This book gathers outstanding research papers presented at the International Conference on Information and Communication Technology for Development (ICICTD 2022), held on July 29¿30, 2022, at the Institute of Information and Communication Technology (IICT), Khulna University of Engineering & Technology (KUET), Khulna, Bangladesh. The topics covered are ICT in health care, ICT in e-commerce, e-governance, collective intelligence, soft computing, optimization, cloud computing, machine learning, intelligent software, robotics, data science, data security, big data analytics and IoT, information systems, computer network, algorithms, and natural language processing.

Over the past few years, there has been an incredible rise in demand for wireless communication technology that supports high data speeds, exceptional spectrum efficiency and excellent broad band fading reduction. Due to changes in how information is generated, shared, and used by today's society, data traffic has rapidly expanded in the wireless realm. There won't be enough spectrum left for wireless technology to manage these high data rates, hence new spectral bands will be needed. This has now come up with the usage of the Terahertz (THz) frequency band (0.1-10 THz). This band is often known as the THz gap since the technology for generating and detecting terahertz radiation is still in its infacy. It is the frequency range between millimeter-wave and infrared that has received the least attention to research fraternity. In order to satisfy the need for 5G and B5G (Beyond 5G) networks, the spectrum between 0.1 and 10 THz is regarded as a scientific innovation. The development of miniaturized antennas in these bands of frequency leads to the miniaturization of the antenna into the range of millimeters or micrometers. For instance, there is an increase in wireless data by 200% for every three years. This in turn, is making the wireless data rate to reach the point where it is almost comparable with the wired communication systems. The antenna required for faster connectivity anywhere at any time has grown in tandem with this trend. Applications for terahertz technology include static point-to-point networking in server rooms or high-performance computer, as well as short-range ultra- broadband accelerated wireless connectivity. The large cable connections in server rooms or supercomputers might be replaced by such an antenna. For the transmission of signals, researchers are looking for SubTHz and THz frequency bands (0.1 THz-10 THz), since very high data rates within a confined duration are becoming the major goal in the emerging communication field. The SubTHz frequency band (0.1 THz) experiences less reduction in signal strength due to atmospheric factors like rain and fog compared to the upper band of THz band, which leads to a spectrum with increased capacity for data transmission. Terahertz frequency communication links are crucial in situations that demand high data rates over short distances. With the help of these frequencies, rapid data transmission can be achieved within a span of 10 meters. There are presently 23 billion devices linked to the internet, and it is predicted that there will be 75 billion devices online by the year 2025.

Decentralized Marketplaces, Lighting Bitcoin Network, Cryptocurrencies You name it. Welcome to the Guide to web 4.0 , follow along as we curate and categorize the Web. Web 4.0 - The next evolutionary leap in the digital realm. Artificial intelligence, virtual reality, and interconnectedness redefines the way we perceive and interact with the online universe. Challenge your understanding of technology, stimulate your curiosity, and ignite your imagination. firsthand with the remarkable advancements and groundbreaking innovations shaping our digital future.