Mischa Dohler – författare
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4 produkter
4 produkter
Understanding UMTS Radio Network Modelling, Planning and Automated Optimisation
Theory and Practice
Inbunden, Engelska, 2006
1 764 kr
Skickas inom 5-8 vardagar
This book sets out to provide the theoretical foundations that will enable radio network planners to plan model and optimize radio networks using state-of-the-art findings from around the globe. It adopts a logical approach, beginning with the background to the present status of UMTS radio network technology, before devoting equal coverage to planning, modelling and optimization issues. All key planning areas are covered, including the technical and legal implications of network infrastructure sharing, hierarchical cell structure (HCS) deployment, ultra-high-site deployment and the benefits and limitations of using computer-aided design (CAD) software. Theoretical models for UMTS technology are explained as generic system models, stand-alone services and mixed services. Business modelling theory and methods are put forward, taking in propagation calculations, link-level, UMTS static and UMTS dynamic simulations. The challenges and goals of the automated optimization process are explored in depth using cutting-edge cost function and optimization algorithms. This theory-based resource containing prolific illustrative case studies explains the reasons for UMTS radio networks performance issues and how to use this foundational knowledge to model, plan and optimize present and future systems.
Ultra-Wideband Antennas and Propagation
For Communications, Radar and Imaging
Inbunden, Engelska, 2006
1 671 kr
Skickas inom 5-8 vardagar
Providing up-to-date material for UWB antennas and propagation as used in a wide variety of applications, "Ultra-wideband Antennas and Propagation for Communications, Radar and Imaging" includes fundamental theory, practical design information and extensive discussion of UWB applications from biomedical imaging, through to radar and wireless communications. An in-depth treatment of ultra-wideband signals in practical environments is given, including interference, coexistence and diversity considerations. The text includes antennas and propagation in biological media in addition to more conventional environments. The topics covered are approached with the aim of helping practising engineers to view the subject from a different angle, and to consider items as variables that were treated as constants in narrowband and wideband systems. Features tables of propagation data, photographs of antenna systems and graphs of results (e.g. radiation patterns, propagation characteristics)Covers the fundamentals of antennas and propagation, as well as offering an in-depth treatment of antenna elements and arrays for UWB systems, and UWB propagation modelsProvides a description of the underlying concepts for the design of antennas and arrays for conventional as well as ultra-wideband systemsDraws together UWB theory by using case-studies to show applications of antennas and propagation in communication, radar and imaging systemsThe book highlights the unique design issues of using ultra-wideband and will serve both as an introductory text and a reference guide for designers and students alike.
1 351 kr
Skickas inom 5-8 vardagar
Facilitating Cooperation for Wireless Systems Cooperative Communications: Hardware, Channel & PHY focuses on issues pertaining to the PHY layer of wireless communication networks, offering a rigorous taxonomy of this dispersed field, along with a range of application scenarios for cooperative and distributed schemes, demonstrating how these techniques can be employed. The authors discuss hardware, complexity and power consumption issues, which are vital for understanding what can be realized at the PHY layer, showing how wireless channel models differ from more traditional models, and highlighting the reliance of PHY algorithm performance on the underlying channel models. Numerous transparent and regenerative relaying protocols are described in detail for a variety of transparent and regenerative cooperative schemes. Key Features: Introduces background, concepts, applications, milestones and thorough taxonomyIdentifies the potential in this emerging technology applied to e.g. LTE/WiMAX, WSNDiscusses latest wireless channel models for transparent and regenerative protocolsAddresses the fundamentals as well as latest emerging PHY protocolsIntroduces transparent distributed STBC, STTC, multiplexing and beamforming protocolsQuantifies regenerative distributed space-time, channel and network coding protocolsExplores system optimization, such as distributed power allocation and relay selectionIntroduces and compares analog and digital hardware architecturesQuantifies complexity, memory and power consumption of 3G UMTS & 4G LTE/WiMAX relayHighlights future research challenges within the cooperative communications field This book is an invaluable guide for professionals and researchers in communications fields. It will also be of interest to graduates of communications and electronic engineering courses. It forms part of an entire series dedicated to cooperative wireless systems.
Blockchains in 6G
A Standardized Approach To Permissioned Distributed Ledgers
Inbunden, Engelska, 2024
1 379 kr
Skickas inom 10-15 vardagar
Based on work done within ETSI, this comprehensive guide dives deep into the heart of blockchains and their imminent intersection with 6G. Whether you're a tech enthusiast or an industry expert, this book promises to enlighten, engage, and inspire, drawing you into the exciting intersection of 6G and blockchains.Part I - Blockchain Enablers: Embark on a foundational journey through blockchains, unraveling their basic principles and complex mechanics. From understanding the rudiments of blockchains to exploring the nuances of smart contracts, this section elucidates the pivotal aspects that make blockchains tick. Learn about the necessity for scalability, interoperability, and the crucial role of permissioned distributed ledgers.Part II - Blockchain Ecosystem: Delve into the underpinnings that form the blockchain ecosystem. This segment demystifies the governance and technical standards that guide blockchains and touches upon the alliances formed in its name. As an essential addition, it delves into the regulatory landscape and the critical R&D projects pushing blockchain boundaries.Part III - Blockchain Standards: Setting a benchmark for quality and reliability, this part deciphers the ETSI standards work governing blockchains. Understand the governance of permissioned distributed ledger (PDL) applications, explore reference architectures, and comprehend the role of smart contracts. Data management in a distributed setup and the intricacies of offline operations are neatly detailed, followed by a deep dive into the challenges and solutions for ledger interoperability.Part IV - Blockchains in 6G: The last part of the book bridges the vast world of blockchains with the frontier of 6G telecommunication systems. Commencing with an introduction to the predecessors of 6G, it then charts the course for blockchains' role in 6G data sharing and the radio access network, as well as the emerging topic of the metaverse.