Trådløs teknologi (WAP)

The iPhone boot camp for getting the most out of your device iPhone For Dummies is the ultimate user-friendly guide to the iPhone! Whether you're new to the iPhone or just want to get more out of it, this book will show you the essentials you need to know to take full advantage of the major features.

PLC Styring gennemgår opbygning af PLCen og hvordan programmeres. PLCen er kernen i langt de fleste automatiserede fabriksanlæg og findes i mange forskellige fabrikater og udgaver fra priser på få tusind kroner. Bogen giver eksempler på anvendelse af en PLC til forskellige opgaver, og kan inspirere de mange mennesker der i kraft af deres arbejde møder den.

In the vast blue ocean, ships of different navies operate far from each other and are generally not in visual range. However, a ship can be uniquely identified based on a number of emissions that are characteristic to each and are called signatures. These include acoustic signature from machinery and flow, heat or infrared signature from exhaust, radar cross section from hull surfaces, magnetic signature from hull material, electric signature from corrosion protection systems etc. These signatures are used by surveillance and tracking sensors for attacking ships in general and warships, in particular. Survivability at sea requires management of all platform signatures to produce a net effect of reduced vulnerability. Anti-ship missiles pose the greatest threat to ships at sea. Prior to the Second World War, studies were carried out in parallel on the use of radar and infrared seekers in missiles for detection, identification and homing. For the materials available in the 1940s, radar seekers gave better results and hence, have become the standard fit. Over the years, advances in material sciences have improved the capabilities of infrared seekers and today, missiles have several guidance/seeker options that include radar, electro- optical camera and infrared imaging. Infrared homing is preferred for terminal guidance because of its inherent immunity to jamming techniques. A stealthy naval platform remains undetected and therefore can be deployed closer to the target to fulfill its mission with lesser risk of damage and associated causalities. Signatures used for ship detection include both underwater and above water. Signatures used by underwater weapons like torpedoes and mines are acoustics, magnetics, wake homing and extremely low frequency emissions (ELFE). Anti-ship missiles use above water signatures that include laser cross section (LCS), radar cross section (RCS), air borne noise and infrared (IR).

At present, the communication systems in Aircrafts involve messy wiring. Such wiring systems require more time for construction and leads to considerable time delay in faulty location. In addition to the cost of lengthy wires, many accidents have been reported due to faulty wiring in aircrafts. To overcome these difficulties, researches are carried out all over the world to develop an efficient wireless communication system. In this book, it is proposed to develop a design procedure for wireless communication system for aircrafts using space division multiple access. Noise from external sources interfere the signals transmitted and the quality of the communication gets degraded. The major aim of this book is to identify and eliminate the additive white Gaussian noise in the communication channel and thereby enhance the quality of wireless communications in the Aircraft.

In the ever-evolving landscape of technology, mobile applications have revolutionized how we live, work, and interact. With the ability to connect us to the outside world and simplify daily tasks, mobile apps have become a vital component of our digital lives. With millions of apps available on different platforms, there is more competition than ever to make outstanding mobile experiences. Welcome to "Unleashing Mobile App Innovation: Mastering Mobile App Development - Advanced Techniques and Best Practices," the starting point to unlocking the secrets of crafting outstanding mobile applications. Mobile app development has advanced significantly since the original launch of Google Play and the App Store. Nowadays, users expect excellence in design, performance, security, and user experience; it is no longer sufficient just to produce a functional app. This e-book will help you become proficient in the innovative techniques and industry best practices needed to achieve these expectations and enhance your knowledge of developing mobile apps. You are already aware of the potential and strength of mobile apps, whether you are a seasoned developer or an aspiring app maker. You've mastered the fundamentals of creating mobile apps, giving you a base to grow. With the aid of this e-book, you will be able to go beyond the fundamentals and get the skills and knowledge necessary to produce exceptional apps that stick out in the crowded app store.

"Satellite Networking Essentials: Building Blocks for Modern Communication" is a comprehensive guide that provides readers with a foundational understanding of satellite networking principles, technologies, and applications. This authoritative book serves as an essential resource for students, engineers, researchers, and professionals seeking to navigate the complex landscape of satellite communication and networking.Written by experts in the field, "Satellite Networking Essentials" offers a holistic overview of satellite networking, covering key topics such as orbital mechanics, satellite orbits, link budgets, modulation techniques, error control coding, multiple access schemes, and network management. The book delves into the fundamental concepts, principles, and protocols underlying satellite communication systems, providing readers with a solid grasp of the theoretical foundations and practical considerations involved in designing, deploying, and managing satellite networks.With its clear explanations, illustrative examples, and real-world case studies, "Satellite Networking Essentials" equips readers with the knowledge and skills needed to tackle the challenges of modern communication infrastructure. Whether you are a student exploring the fundamentals of satellite networking or a seasoned professional seeking to stay abreast of the latest developments in the field, this book serves as a valuable reference guide and educational resource."Satellite Networking Essentials: Building Blocks for Modern Communication" is an indispensable resource for anyone interested in understanding the essential components and principles that underpin satellite networking in the modern era. Whether you are exploring the basics of satellite communication or delving into advanced topics in satellite networking, this book provides the guidance and insights you need to succeed in the dynamic and evolving field of satellite communication.

""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.

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 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.

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 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

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.

This book gathers selected papers presented at the International Conference on Artificial Intelligence and Communication Technologies (ICAICT2023), held at Changsha, China during March 2023. The second volume will involve research works aimed at the contemporary applications: emerging wireless/mobile applications, context and location-aware wireless services; wireless telemedicine and e-health services; intelligent transportation systems; RFID technology and application; cognitive radio and sensor-based applications; content distribution in wireless home environment and many others.

This book provides a comprehensive treatment of the performance evaluation of UAV communication systems, using stochastic geometry to explore the impact of the random positions of UAVs on transmission performance. The book focuses on engineering practice, with both modeling and analysis of UAV communication systems. It offers an in-depth study of several important UAV communication application scenarios, including UAV-terrestrial communication, UAV-to-UAV communication, satellite-UAV communication, and UAV relay communication.One of the key features of the book is its systematic approach to addressing UAV communication issues and providing practical insights. The book is especially useful for readers interested in learning how to model and analyze the performance of UAV communications systems. It will benefit researchers, engineers, and graduate students in the fields of wireless communications, signal processing, and related areas.

This book presents peer-reviewed articles from the 8th International Conference on Space Science and Communication (IConSpace 2023), held at Penang in Malaysia. It addresses complications of ground-breaking initiatives and solutions for space science and communications research, telecommunications, and meteorology. With the theme Advanced Space Technology: Accelerating Global Agenda will provide valid information to understand trends, evaluate needs, and create global development policies and programs in the best interest of all. It brings together researchers, engineers, geospatialist, meteorologists, astronomers, and practitioners in order to present the latest applications in space science, telecommunications, meteorology, remote sensing, and related fields.

Underwater wireless communication system designers have been confronted with an ever-increasing need for high-capacity and high-data-rate wireless applications for real-time image and video transmission. Acoustic wireless communication (AWC) has been preferred inside the water over a long-range communication (a few kms). However, due to having a drawback of low data rate (upto kbps) in AWC, the visible light communication (VLC) is growing attention as an attractive alternative to AWC, as VLC supports high data rate. Di¿erent sorts of light transmissions, such as horizontal, vertical, and slant, are possible. When visible light travels through an underwater channel, it encounters a variety of negative factors due to the interaction of the light wave with underwater constituents. Path loss and turbulence are two of the most critical factors that cause severe fading. Path loss quanti¿es the amount of power a signal loses as it travels through a communication channel. Underwater turbulence occurs due to the change in refractive index of the water, thereby causing random ¿uctuations in the received signal strength. This phenomenon is referred as turbulence-induced fading. The main cause of change in refractive index is variation of temperature, eddy particles and pressure inside water. Since surface of the sea is directly imposed with sun rays and due to which the temperature of the surface water is higher as compared to the temperature of deeper dark water. Visible Light Communication refers to optical wireless communication systems that operate in the visible band (390 ¿ 750 nm). LEDs or lasers are used in VLC systems because they can be pulsed at very high speeds without äecting the lighting output or the human eye. The use of LEDs is a sustainable and energy- e¿cient strategy for both illumination and communication. The properties of sea water are transparent to blue and green light (450 nm to 530 nm) and exhibit low attenuation. Underwater VLC is able to provide data rate up to Gbps in a real-time environment. In the Underwater VLC system, spatial diversity has proven to be an e¿ective and widely used technique to alleviate the e¿ects of fading and improve the performance of communication systems. In spatial diversity, several parallel communication links are formed between transmitter and receiver by employing multiple transmit and/or receive branches (MIMO systems).

Wireless Sensor Networks (WSNs) have emerged as a transformative technology with profound implications for a wide range of industries and applications, from environmental monitoring to healthcare, smart cities to industrial automation. The rapid proliferation of these networks has underscored the critical need for a comprehensive and accessible resource to help both novice and experienced practitioners navigate the complexities of WSN design, deployment, and management. "Fundamentals of Wireless Sensor Networks" aims to fill this gap by offering a comprehensive and up-to-date introduction to the core principles, key technologies, and practical considerations that underpin WSNs.This book is designed to be a valuable resource for students, researchers, engineers, and professionals seeking to gain a solid foundation in WSNs. It covers essential topics such as sensor node hardware, communication protocols, energy management, data fusion, security, and applications. By combining theoretical insights with practical examples and case studies, this book equips readers with the knowledge and skills necessary to design and deploy effective wireless sensor networks in diverse contexts. Whether you are a student embarking on a journey into the world of WSNs or a seasoned practitioner looking to refresh your knowledge, "Fundamentals of Wireless Sensor Networks" provides the essential groundwork for understanding and harnessing the potential of this transformative technology.

Mobile and Wireless Communication has become an integral part of our modern world, shaping the way we connect, communicate, and conduct business in ways unimaginable just a few decades ago. This book, "Mobile and Wireless Communication," is a comprehensive exploration of this dynamic and rapidly evolving field. As our society becomes increasingly reliant on mobile devices and wireless networks, understanding the principles and technologies that underpin this revolution is essential. In this book, we delve into the fundamentals of mobile and wireless communication, from the historical development of the field to the latest advancements and emerging trends. Whether you are a student embarking on a journey to grasp the intricacies of wireless technologies or a seasoned professional seeking to stay up-to-date in this ever-changing domain, this book is designed to provide you with a solid foundation and a roadmap to navigate the exciting landscape of mobile and wireless communication.Throughout the pages of this book, we aim to demystify the complexities of mobile and wireless communication, offering clear explanations, practical insights, and real-world examples. We cover a wide range of topics, from the basics of wireless transmission and cellular networks to cutting-edge technologies such as 5G and beyond. Our goal is to empower readers with the knowledge and tools they need to not only understand but also contribute to the ongoing innovations in mobile and wireless communication. We invite you to embark on this enlightening journey with us and explore the fascinating world of Mobile and Wireless Communication, where technology meets connectivity to shape the future of our digital society.

This book focuses on the receiver design issue in high spectral efficiency communication systems, which is one of the main research directions in beyond 5G and 6G era. In particular, this book studies two technologies to improve the spectral efficiency, i.e., FTN signaling which transmits more data information in the same time period and NOMA scheme which supports more users with the same resource elements. Different commonly used channel propagation conditions are considered, and advanced signal processing algorithms have been developed for designing receivers, which is suitable for low-complexity receiver design in engineering practice. Moreover, this book discusses possible solutions to further increase spectral efficiency and propose practical receivers in such scenarios. It benefits researchers, engineers, and students in the fields of wireless communications and signal processing.

Forget the desktop, this is the era of the pocket powerhouse. Smartphones have not just transformed communication, but ignited a mobile revolution, reshaping how we experience the world - and how we buy. In this dynamic landscape, understanding the new dance between consumer behavior and marketing strategies is not optional, it's essential. "The Mobile Revolution" delves deep into this fascinating interplay. Get ready to unpack the micro-moments that define modern decision-making - the instant searches, the lightning-fast comparisons, the social validation fueling every purchase. We'll explore how brands are adapting to this always-on, hyper-connected audience, crafting personalized experiences that fit seamlessly into their mobile journeys. No longer passive viewers, consumers now wield unprecedented power, demanding convenience, context, and a frictionless path from curiosity to click. Witness the rise of augmented reality, voice search, and shoppable experiences, blurring the lines between physical and digital. Learn how data-driven insights and AI personalization are enabling brands to speak directly to individual desires, crafting messages that resonate in the palm of their hand. From omnichannel engagement to app-centric ecosystems, "The Mobile Revolution" is your roadmap to navigating this dynamic terrain. It's a story of adaptation, innovation, and ultimately, connection - because in the mobile age, brands that truly understand their audience can unlock explosive growth, one micro-moment at a time.

This book provides a comprehensive and systematic exploration of next-generation Edge Intelligence (EI) Networks. It delves deep into the critical design considerations within this context, emphasizing the necessity for functional and dependable interactions between networking strategies and the diverse application scenarios. This should help assist to encompass a wide range of environments.This book also discusses topics such as resource optimization, incentive mechanisms, channel prediction and cutting-edge technologies, which includes digital twins and advanced machine learning techniques. It underscores the importance of functional integration to facilitate meaningful collaborations between networks and systems, while operating across heterogeneous environments aiming support novel and disruptive human-oriented services and applications. Valuable insights into the stringent requirements for intelligence capabilities, communication latency and real-time response are discussed. This characterizes the new EI era, driving the creation of comprehensive cross-domain architectural ecosystems that infuse human-like intelligence into every aspect of emerging EI systems.This book primarily targets advanced-level students as well as postdoctoral researchers, who are new to this field and are searching for a comprehensive understanding of emerging EI systems. Practitioners seeking guidance in the development and implementation of EI systems in practical contexts will also benefit from this book.

Multiple-input, multiple-output (MIMO) communication technology has become a critical enabler for high-speed wireless communication systems. This edited volume, MIMO Communications ¿ Fundamental Theory, Propagation Channels, and Antenna Systems, is a comprehensive resource for researchers, graduate students, and practicing engineers in wireless communication. The volume is divided into four parts that cover the foundations of wireless communications, antenna techniques, channel modeling, autonomous driving and radars. Experts in the field have authored chapters covering various topics, including capacity analysis of MIMO channels, antenna array design and beamforming techniques, channel modeling and estimation, and the applications of autonomous driving and radars. This book provides a detailed and accessible introduction to the latest research and practical applications in MIMO communication technology. It is an essential resource for anyone interested in learning about MIMO communication technology or looking to deepen their understanding of existing systems.