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Broadband circuits for optical fiber communication
An expert guide to the new and emerging field of broadband circuits for optical fiber communication This exciting publication makes it easy for readers to enter into and deepen their knowledge of the new and emerging field of broadband circuits for optical fiber communication. The author's selection and organization of material have been developed, tested, and refined from his many industry courses and seminars. Five types of broadband circuits are discussed in detail:
* Transimpedance amplifiers
* Limiting amplifiers
* Automatic gain control (AGC) amplifiers
* Lasers drivers
* Modulator drivers Essential background on optical fiber, photodetectors, lasers, modulators, and receiver theory is presented to help readers understand the system environment in which these broadband circuits operate. For each circuit type, the main specifications and their impact on system performance are explained and illustrated with numerical values. Next, the circuit concepts are discussed and illustrated with practical implementations. A broad range of circuits in MESFET, HFET, BJT, HBT, BiCMOS, and CMOS technologies is covered. Emphasis is on circuits for digital, continuous-mode transmission in the 2.5 to 40 Gb/s range, typically used in SONET, SDH, and Gigabit Ethernet applications. Burst-mode circuits for passive optical networks (PON) and analog circuits for hybrid fiber-coax (HFC) cable-TV applications also are discussed. Learning aids are provided throughout the text to help readers grasp and apply difficult concepts and techniques, including:
* Chapter summaries that highlight the key points
* Problem-and-answer sections to help readers apply their new knowledge
* Research directions that point to exciting new technological breakthroughs on the horizon
* Product examples that show the performance of actual broadband circuits
* Appendices that cover eye diagrams, differential circuits, S parameters, transistors, and technologies
* A bibliography that leads readers to more complete and in-depth treatment of specialized topics This is a superior learning tool for upper-level undergraduates and graduate-level students in circuit design and optical fiber communication. Unlike other texts that concentrate on analog circuits in general or mostly on optics, this text provides balanced coverage of electronic, optic, and system issues. Professionals in the fiber optic industry will find it an excellent reference, incorporating the latest technology and discoveries in the industry.
eBook
Modern small antennas
\"If you are involved in designing and developing small antennas, this complete, cutting-edge guide covers everything you need to know. From fundamentals and basic theory to design optimization, evaluation, measurements and simulation techniques, all the essential information is included. You will also get many practical examples from a range of wireless systems, whilst a glossary is provided to bring you up to speed on the latest terminology. A wide variety of small antennas is covered, and design and practice steps are described for each type: electrically small, functionally small, physically constrained small and physically small. Whether you are a professional in industry, a researcher, or a graduate student, this is your essential guide to small antennas\"-- Provided by publisher.
Book
Acknowledgements are not just thank you notes: A qualitative analysis of acknowledgements content in scientific articles and reviews published in 2015
Acknowledgements in scientific articles can be described as miscellaneous, their content ranging from pre-formulated financial disclosure statements to personal testimonies of gratitude. To improve understanding of the context and various uses of expressions found in acknowledgements, this study analyses their content qualitatively. The most frequent noun phrases from a Web of Science acknowledgements corpus were analysed to generate 13 categories. When 3,754 acknowledgement sentences were manually coded into the categories, three distinct axes emerged: the contributions, the disclaimers, and the authorial voice. Acknowledgements constitute a space where authors can detail the division of labour within collaborators of a research project. Results also show the importance of disclaimers as part of the current scholarly communication apparatus, an aspect which was not highlighted by previous analyses and typologies of acknowledgements. Alongside formal disclaimers and acknowledgements of various contributions, there seems to remain a need for a more personal space where the authors can speak for themselves, in their own name, on matters they judge worth mentioning.
Journal Article
Fiber optic installer's field manual
\"A fully updated fiber optic cable installation guideExtensively revised to cover the latest technologiesand equipment, this portable tool shows you how toplan, install, and maintain a robust fiber optic networkto support today's high speed requirements. The emphasis is on practical, efficient installation techniques using current global industry standards. Detailed diagrams and step-by-step procedures walk you through the entire process. This completely up-to-date edition is an essential on-the-job reference.Fiber Optic Installer's Field Manual, Second Edition, covers: Properties of light Optical fiber Fiber optic cables Fiber optic cable procurement Safety precautions Handling fiber optic cable Outdoor fiber optic cable installation Indoor cable installation Fiber optic cable general installation guide Splicing and termination Patch cords and connectors Optical fiber power loss and measurement The OTDR and OSA Fiber optic installation tests Transceivers such as SFP and XFP WDM and other passive optical equipment SONET/SDH Ethernet over fiber Fiber system deployment Maintenance Emergency cable repair Network documentation Troubleshooting Design fundamentals Personnel Dark fiber leasing Global standards reference tables \"-- Provided by publisher.
Book
Broadband communications via high-altitude platforms
In this book, the authors provide a thorough overview of the state of the art in high-altitude platform (HAP) enabling technologies, addressing recent research activities and results. In addition, the book explores the enabling technologies and economics of HAP-based communication systems, including issues related to aeronautics, applications and business modelling, as well as future trends. Furthermore, the authors discuss broadband wireless communications from HAPs, the operating environment, and advanced communication techniques for efficient radio link resource management. Similarly, the authors complement radio frequency (RF) dominated issues with free space optical communications in the HAP operating environment, focusing on physical and networking layers. Finally, the book addresses the multiple HAP constellations planning procedure and discusses the networking implications of using multiple HAPs. Key Features: Focuses on placing HAPs in the perspective of current and future broadband wireless communication systems Offers an overview of the constraints affecting HAP-based broadband communications Provides a thorough overview and state of the art of the HAP enabling technologies, including recent research activities and future directions Examines the operating environment, advanced communication techniques for efficient radio link resource management, and suitable antennas Addresses multiplatform constellations, presenting the multiple HAP constellation planning procedure and discussing the networking implications of using multiple HAPs This book will be of valuable interest to researchers and practitioners in the areas of wireless communications, satellite communications and high-altitude platforms, and development engineers involved in the design and development of HAP systems.
eBook
Construction of health status recognition and prediction model for power communication equipment based on TFIDF-COS
When power communication equipment malfunctions, the stability and safety of the power grid are compromised. This is due to the health status of the equipment. The safety and stability of the power grid will be impacted if dispatchers take too long to identify the fault’s origin and kind, which will disrupt the power communication system’s regular operations. In order to solve the problem of poor health status of power communication system due to the inability to timely determine and deal with the faults of power communication equipment, the study proposes the construction of health status recognition of power communication equipment with prediction model based on term frequency-inverse document frequency and cosine similarity. The model firstly extracted the fault information of power communication equipment and builds the fault knowledge graph. Secondly, the study identified and built a prediction model for the health status of power communication equipment based on term frequency-inverse document frequency and cosine similarity model. The outcomes revealed that the training model had the highest accuracy and the lowest loss rate when the learning rate was set to 1 × 10−5. When the iterations was set to 70, the training and test sets had the highest accuracy and the lowest loss rate. When the model utilized in the study was compared to other models with varying numbers of samples in the dataset, it performed well in terms of runtime and fault diagnosis accuracy. The model developed by the study improves the accuracy of fault extraction and recognition and can better ensure the normal operation of power communication equipment.
Journal Article
Intelligent patrol inspection of low code enabled electric power communication equipment based on digital transformation
In order to meet the needs of digital development of power system and ensure the safety of power communication equipment, an intelligent patrol inspection method for power communication equipment with low code enabling based on digital transformation is proposed. Build an intelligent patrol platform for low code enabled power communication equipment based on digital transformation. The data acquisition module of the infrastructure layer scans the RFID tags on the communication equipment through the patrol personnel’s handheld devices to obtain the specific information of the current equipment. The UDT data transmission protocol of the data transmission module transmits the equipment information collected by the patrol personnel to the patrol application layer; The fault diagnosis module of patrol application layer uses convolutional neural network to analyze patrol data and complete fault detection of power communication equipment; The integrated component layer uses the application components developed by visual tools to enable the platform with low code through the low threshold platform development technology; The front-end service layer, supported by the technology of the integrated component layer, implements the simplification and configurable processing of front-end display results such as patrol results display, and views and manages the patrol results of the platform through the user terminal layer. The experiment shows that the method is accurate in data acquisition, fast in data transmission and high in fault diagnosis accuracy. It is a highly practical intelligent patrol method for power communication equipment.
Journal Article
Compact Multifunctional Antennas for Wireless Systems
Offers an up-to-date description of modern multifunctional antenna systems and microwave components Compact multifunctional antennas are of great interest in the field of antennas and wireless communication systems, but there are few, if any, books available that fully explore the multifunctional concept. Divided into six chapters, Compact Multifunctional Antennas for Wireless Systems encompasses both the active and passive multifunctional antennas and components for microwave systems. It provides a systematic, valuable reference for antenna/microwave researchers and designers. Beginning with such novel passive components as antenna filters, antenna packaging covers, and balun filters, the book discusses various miniaturization techniques for the multifunctional antenna systems. In addition to amplifying and oscillating antennas, the book also covers design considerations for frequency- and pattern-reconfigurable antennas. The last chapter is dedicated to the field of solar cell integrated antennas. Inside, readers will find comprehensive chapters on: Compact Multifunctional Antennas in Microwave Wireless Systems Multifunctional Passive Integrated Antennas and Components Reconfigurable Antennas Receiving Amplifying Antennas Oscillating Antennas Solar cell integrated Antennas Aimed at professional engineers and researchers designing compact antennas for wireless applications, Compact Multifunctional Antennas for Wireless Systems will prove to be an invaluable tool.
eBook