Alejandro A. Aragón-Zavala – författare

High-Altitude Platforms for Wireless Communications Provides an introduction to High-Altitude Platform Stations (HAPS) technology and its applications for wireless communications High-altitude platform stations offer a promising new technology that combines the benefits of terrestrial and satellite communication systems for delivering broadband communications to users at a low cost. They are easily deployable and easy to maintain, which is why they offer a good alternative for network operators who need to find ways to get more coverage to satisfy the increasing demand for more capacity. HAPS are usually balloons, airships or unmanned aerial systems (UAS) located in the stratosphere. An enormous interest has grown worldwide to examine their use not only for broadband communications, but also for emergency services, navigation, traffic monitoring, cellular, etc. Key features include: Unique book focusing on emerging HAPS technology and its applicationsProvides a thorough overview of the technology including HAPS-based communications systems, antennas for HAPS, radio propagation and channel modelling issues and HAPS networking aspectsPresents various HAPS-related projects and initiatives developed throughout the world (North America, Europe and Asia-Pacific)Features a comprehensive overview on both aeronautical and telecommunications regulatory aspects, which will affect the deployment and future developments in the field of HAPSHigh-Altitude Platform Systems for Wireless Communications will prove essential reading for postgraduate students in the field of HAPS, engineers, developers and designers involved in the design and maintenance of HAPS, aerospace engineers, and communications system planners and researchers.

Indoor Wireless Communications: From Theory to Implementation provides an in-depth reference for design engineers, system planners and post graduate students interested in the vastly popular field of indoor wireless communications. It contains wireless applications and services for in-building scenarios and knowledge of key elements in the design and implementation of these systems.  Technologies such as Wireless Local Area Networks, Bluetooth, ZigBee, Indoor Optical Communications, WiMAX, UMTS and GSM for indoor environments are fully explained and illustrated with examples.  Antennas and propagation issues for in-building scenarios are also discussed, emphasizing models and antenna types specifically developed for indoor communications.  An exhaustive survey on indoor wireless communication equipment is also presented, covering all available technologies including antennas, distribution systems, transceivers and base stations.

Comprehensive resource describing both fundamentals and practical industry applications of antennas and radio propagation employed in modern wireless communication systems The newly revised and thoroughly updated Third Edition of this classic and popular text, Antennas and Propagation for Wireless Communication Systems addresses fundamentals and practical applications of antennas and radio propagation commonly used in modern wireless communication systems, from the basic electromagnetic principles to the characteristics of the technology employed in the most recent systems deployed, with an outlook of forthcoming developments in the field. Core topics include fundamental electromagnetic principles underlying propagation and antennas, basic concepts of antennas and their application to specific wireless systems, propagation measurement, modelling, and prediction for fixed links, macrocells, microcells, femtocells, picocells, megacells, and narrowband and wideband channel modelling with the effect of the channel on communication system performance. Worked examples and specific assignments for students are presented throughout the text (with a solutions manual available for course tutors), with a dedicated website containing online calculators and additional resources, plus details of simple measurements that students can perform with off-the-shelf equipment, such as their laptops and a Wi-Fi card. This Third Edition of Antennas and Propagation for Wireless Communication Systems has been thoroughly revised and updated, expanding on and adding brand new coverage of sample topics such as: Maxwell’s equations and EM theory, multiple reflections as propagation mechanisms, and waveguiding HAPS (High Altitude Platforms) propagation, design and noise considerations of earth stations, macrocell models, and cellular base station site engineeringFSS (frequency selective surfaces), adaptive antenna theory developments (massive and distributed MIMO in particular), and how to process raw data related to channel measurements for mobile radio systemsThe techniques used in mobile systems spanning the latest 4G, 5G and 6G technology generations A wider range of frequencies, extending from HF, VHF and UHF up to the latest millimetre wave and sub terahertz bandsWith comprehensive coverage of foundational subject matter as well as major recent advancements in the field, Antennas and Propagation for Wireless Communication Systems is an essential resource for undergraduate and postgraduate students, researchers, and industry engineers in related disciplines.