Yi Huang

This SpringerBrief investigates the performance of semi-blind independent component analysis (ICA) based equalization and carrier frequency offset estimation approaches (CFO) for a number of orthogonal frequency division multiplexing (OFDM) based wireless communication systems. It provides a comprehensive overview of the challenges of channel equalization and frequency synchronization for different wireless systems. The authors present the wireless communication channel and system models. Key existing CFO estimation methods are reviewed, along with a number of the training based and non-training based (blind) channel estimation methods. This is followed by a study of ICA and its applications to OFDM-based wireless communication systems. Later chapters provide a detailed description of recent research on semi-blind CFO estimation and ICA based equalization approaches for various wireless communication systems including multiple-input multiple-output (MIMO) OFDM and coordinated multipoint (CoMP) systems. Semi-blind CFO estimation and equalization structures provide a spectrum-efficient and high-performance solution for high speed wireless communications. This book is suitable for postgraduate students, researchers or professionals in the area of wireless communications.

Wraz z upowszechnieniem się Internetu i medi w spolecznościowych świat nie tylko stopniowo zmienia się w plaski rynek handlu międzynarodowego, ale także otwiera się, stając się r wnym polem gry dla komunikacji. Zrozumienie, w jaki spos b element kulturowy i rozw j medi w spolecznościowych wplywają na globalną komunikację, jest szczeg lnie ważne dla firm technologicznych dzialających w sektorze B2C, ponieważ są one zaangażowane w ciągle dostarczanie innowacyjnych produkt w i przekazywanie tych nowych koncepcji ludziom z r żnych kultur na calym świecie. Aby pom c wam poprawic skutecznośc komunikacji, autor dokonuje przeglądu aktualnych publikacji naukowych i przeprowadza doglębną analizę treści w celu zbadania skuteczności dzialań w mediach spolecznościowych dw ch międzynarodowych firm technologicznych B2C, Microsoft i Lenovo, na chińskich i amerykańskich platformach spolecznościowych z perspektywy motywacji, a następnie podsumowuje kilka ważnych zasad komunikacji w mediach spolecznościowych w r żnych kulturach.

Avec l'arriv e d'Internet et des r seaux sociaux, le monde devient pas pas un march plat pour le commerce international, mais aussi un terrain de jeu galitaire pour la communication. Comprendre comment la culture et l'essor des r seaux sociaux influencent la communication mondiale est super important pour les entreprises technologiques B2C, car elles s'engagent toujours proposer des produits innovants et communiquer ces nouveaux concepts des gens du monde entier issus de cultures diff rentes. Pour aider ces entreprises am liorer l'efficacit de leurs communications, l'auteur passe en revue les articles universitaires actuels et fait une analyse approfondie du contenu pour voir l'efficacit des activit s sur les r seaux sociaux de deux entreprises technologiques B2C internationales, Microsoft et Lenovo, sur les plateformes chinoises et am ricaines, en se basant sur la motivation, puis r sume plusieurs principes importants pour les communications sur les r seaux sociaux dans diff rentes cultures.

Con l'arrivo di Internet e dei social media, il mondo non solo sta diventando un mercato pi accessibile per il commercio internazionale, ma si sta anche aprendo per diventare un campo di gioco pi equo per le comunicazioni. Capire come la cultura e l'ascesa dei social media influenzano le comunicazioni globali super importante per le aziende tecnologiche B2C, perch sono sempre impegnate a creare prodotti innovativi e a comunicare queste nuove idee a persone di tutto il mondo con culture diverse. Per aiutare queste aziende a migliorare l'efficacia della comunicazione, l'autore esamina gli attuali articoli accademici e conduce un'analisi approfondita dei contenuti per analizzare l'efficacia delle attivit sui social media di due aziende tecnologiche B2C internazionali, Microsoft e Lenovo, sulle piattaforme social cinesi e statunitensi dal punto di vista della motivazione, per poi riassumere diversi principi importanti per la comunicazione sui social media in culture diverse.

Com a Internet e as redes sociais, o mundo n o s est a tornar-se um mercado mais plano para o com rcio internacional, mas tamb m est a abrir para se tornar um campo de jogo mais igual para as comunica es. Entender como a cultura e o crescimento das redes sociais influenciam as comunica es globais super importante para as empresas de tecnologia B2C, porque elas est o sempre a lan ar produtos inovadores e a comunicar esses novos conceitos para pessoas de diferentes culturas em todo o mundo. Para ajudar essas empresas a melhorar a efic cia das comunica es, o autor analisa artigos acad micos atuais e faz uma an lise de conte do completa para ver a efic cia das atividades nas redes sociais de duas empresas internacionais de tecnologia B2C, a Microsoft e a Lenovo, nas plataformas de redes sociais chinesas e americanas, do ponto de vista da motiva o, e depois resume v rios princ pios importantes para as comunica es nas redes sociais em diferentes culturas.

Mit dem Einzug von Internet und sozialen Medien wird die Welt nicht nur langsam zu einem flachen Markt f r den internationalen Handel, sondern auch zu einem fairen Spielfeld f r die Kommunikation. Zu verstehen, wie kulturelle Elemente und der Aufstieg der sozialen Medien die globale Kommunikation beeinflussen, ist besonders wichtig f r B2C-Technologieunternehmen, weil sie st ndig innovative Produkte liefern und diese neuen Konzepte Menschen aus verschiedenen Kulturen auf der ganzen Welt n herbringen wollen. Um diesen Unternehmen zu helfen, ihre Kommunikation effektiver zu gestalten, schaut sich der Autor aktuelle wissenschaftliche Arbeiten an und macht eine gr ndliche Inhaltsanalyse, um die Effektivit t der Social-Media-Aktivit ten von zwei internationalen B2C-Technologieunternehmen, Microsoft und Lenovo, auf chinesischen und US-amerikanischen Social-Media-Plattformen aus der Perspektive der Motivation zu analysieren. Anschlie end fasst er einige wichtige Grunds tze f r die Social-Media-Kommunikation in verschiedenen Kulturen zusammen.

Antennas From Theory to Practice Comprehensive coverage of the fundamentals and latest developments in antennas and antenna design In the newly revised Second Edition of Antennas: From Theory to Practice, renowned researcher, engineer, and author Professor Yi Huang delivers comprehensive and timely coverage of issues in modern antenna design and theory. Practical and accessible, the book is written for engineers, researchers, and students who work with radio frequency/microwave engineering, radar, and radio communications. The book details the basics of transmission lines, radiowaves and propagation, antenna theory, antenna analysis and design using industrial standard design software tools and the theory of characteristic modes, antenna measurement equipment, facilities, and techniques. It also covers the latest developments in special topics, like small and mobile antennas, wide- and multi-band antennas, automotive antennas, RFID, UWB, metamaterials, reconfigurable and MIMO antennas, and more. The new edition includes up to date information on a wide variety of newly relevant topics and trends, like adaptive impedance matching, the theory of characteristic modes, antenna materials and fabrication processes, and over-the-air (OTA) antenna system measurements. Many questions and examples are provided which enhances the ­learning experience. The book covers: An introduction to circuit concepts and transmission lines, including lumped and distributed element systems, transmission line theory, and the Smith ChartAn exploration of field concepts and radiowaves, including wave equations and solutions and radiowave propagation mechanisms, characteristics, and modelsDiscussions of antenna basics and popular antennas, including wire-type antennas, aperture-type antennas, and antenna arraysInformation about antenna manufacturing and measurements, including antenna measurement facilities and methodsThe use of industrial standard simulation tools for antenna design and analysis Perfect for engineers and researchers who work in RF engineering or radar and radio communications, Antennas: From Theory to Practice, Second Edition will also earn a place on the bookshelves of university students seeking a concise and practical introduction to the basics of antennas and antenna design.

A comprehensive review of the recent advances in anechoic chamber and reverberation chamber designs and measurements Anechoic and Reverberation Chambers is a guide to the latest systematic solutions for designing anechoic chambers that rely on state-of-the-art computational electromagnetic algorithms. This essential resource contains a theoretical and practical understanding for electromagnetic compatibility and antenna testing. The solutions outlined optimise chamber performance in the structure, absorber layout and antenna positions whilst minimising the overall cost. The anechoic chamber designs are verified by measurement results from Microwave Vision Group that validate the accuracy of the solution. Anechoic and Reverberation Chambers fills this gap in the literature by providing a comprehensive reference to electromagnetic measurements, applications and over-the-air tests inside chambers. The expert contributors offer a summary of the latest developments in anechoic and reverberation chambers to help scientists and engineers apply the most recent technologies in the field. In addition, the book contains a comparison between reverberation and anechoic chambers and identifies their strengths and weaknesses. This important resource: • Provides a systematic solution for anechoic chamber design by using state-of-the-art computational electromagnetic algorithms • Examines both types of chamber in use: comparing and contrasting the advantages and disadvantages of each • Reviews typical over-the-air measurements and new applications in reverberation chambers • Offers a timely and complete reference written by authors working at the cutting edge of the technology • Contains helpful illustrations, photographs, practical examples and comparison between measurements and simulations Written for both academics and industrial engineers and designers, Anechoic and Reverberation Chambers explores the most recent advances in anechoic chamber and reverberation chamber designs and measurements.

This book covers important and timely issues in Reverberation Chambers (RCs) and their applications to EMC and Antenna measurements. Developed specifically for university students, researchers, practicing industrial engineers and designers who work with antennas in radio frequency (RF) engineering, EMC, radar, and radio communications. This book will provide the reader with a firm theoretical and practical understanding of the RCs operation, allowing them to undertake practical antenna and EMC measurement work with confidence and accuracy. The book is built on many years of research by the authors that encompass many of the new advances in antenna design.