Ben Allen – författare

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.

In the last fifty years, extensive studies have been carried out worldwide in the field of adaptive array systems. However, far from being a mature technology with little research left to tackle, there is seemingly unlimited scope to develop the fundamental characteristics and applications of adaptive antennas for future 3G and 4G mobile communications systems, ultra wideband wireless and satellite and navigation systems, and this informative text shows you how! Provides an accessible resource on adaptive array fundamentals as well as coverage of adaptive algorithms and advanced topicsAnalyses the performance of various wideband beamforming techniques in wideband array processingComprehensively covers implementation issues related to such elements as circular arrays, channel modelling and transmit beam forming, highlighting the challenges facing a designer during the development phaseSupports practical implementation considerations with detailed case studies on wideband arrays, radar, sonar and biomedical imaging, terrestrial wireless systems and satellite communication systemsIncludes examples and problems throughout to aid understandingCompanion website features Solutions Manual, Matlab Programs and Electronic versions of some figuresAdaptive Array Systems is essential reading for senior undergraduate and postgraduate students and researchers in the field of adaptive array systems. It will also have instant appeal to engineers and designers in industry engaged in developing and deploying the technology. This volume will also be invaluable to those working in radar, sonar and bio-medical applications.

An intuitive and insightful overview of the technical and business aspects of the telecoms industryIn The Technology and Business of Mobile Telecommunications: An Introduction, a team of expert telecommunications researchers and consultants delivers a rigorous exploration of the technical and business aspects of mobile telecommunications. The book offers a complete overview of an industry that has seen rapid technical and economic changes while retaining the ability to provide end users with communications coverage and capacity.The authors demonstrate the technical foundations of the mobile industry and show how a communications network is deployed. They detail many of the main innovations introduced over the last few years and some of the most salient challenges facing the industry today. The business models of major mobile operators are examined as well, from the purchasing spectrum to network deployment and customer attraction and retention.The role of the regulator is also thoroughly discussed, with explorations of its role in encouraging the maintenance of a competitive market in which the needs of consumers are met.Readers will also enjoy: Thorough introductions to the social and economic impacts of mobile communications, as well as a brief history of mobile and cellular communicationsComprehensive explorations of the mobile telecoms ecosystem, from spectrum regulation to standardization, research, end users, operators, vendors, and standard bodiesPractical discussions of the business models and challenges of mobile operators, including mobile virtual network operators and the implementation of international roamingIn-depth examinations of telecommunications standards, including 5GPerfect for anyone studying mobile telecommunications technology at the undergraduate and graduate levels, The Technology and Business of Mobile Telecommunications: An Introduction is also an indispensable resource for practitioners within the telecommunications industry in a technical or business-oriented role.

LTE- A and Next Generation Wireless Networks: Channel Modeling and Performance describes recent advances in propagation and channel modeling necessary for simulating next generation wireless systems. Due to the radio spectrum scarcity, two fundamental changes are anticipated compared to the current status. Firstly, the strict reservation of a specific band for a unique standard could evolve toward a priority policy allowing the co-existence of secondary users in a band allocated to a primary system. Secondly, a huge increase of the number of cells is expected by combining outdoor base stations with smaller cells such as pico/femto cells and relays. This evolution is accompanied with the emergence of cognitive radio that becomes a reality in terminals together with the development of self-organization capabilities and distributed cooperative behaviors.The book is divided into three parts: Part I addresses the fundamentals (e.g. technologies, channel modeling principles etc.)Part II addresses propagation and modeling discussing topics such as indoor propagation, outdoor propagation, etc.Part III explores system performance and applications (e.g. MIMO Over-the-air testing, electromagnetic safety, etc).