W-CDMA Mobile Communications System

TETRA is a system for mobile wireless communications and this is a highly topical and comprehensive introduction to the design and applications of TETRA systems including practical examples. TETRA is comparable in structure to the world-wide successful GSM system, however, individual features of TETRA are different, often more efficient and better designed than in GSM. TETRA is therefore providing an important source for the further development of standards for mobile telecommunications. This volume is timely and one of the first to cover TETRA and related subject areas. Features include: * Detailed discussion of public and private mobile communications domain * Architecture, components and services of TETRA and * Design and operational aspects of the system Based on courses for industry, presented by the authors, Digital Mobile Communications and the TETRA System will prove indispensable reading for service providers, design engineers and systems managers in the private mobile communications market. It also provides a thorough grounding in general digital mobile communications for communications engineers and undergraduate and postgraduate students in telecommunications.

Demand for Mobile Satellite Service (MSS) is on the increase, with a huge surge of interest in mobile communications in recent years and high-paced advancements in the supporting system architectures, devices and applications. This thoroughly revised and updated book provides a comprehensive guide to the MSS technologies and emerging trends. It takes a system level approach, giving in-depth treatment of technical and business related issues. The author, a leading professional in the area, draws on his extensive experience in industry and research, to provide the reader with a sound and informed understanding of the technology. Mobile Satellite Communications includes introductory material for the reader new to the field, in addition to exploring prevalent system concepts, architecture, practices and trends for the more experienced. An in-depth review of scientific principles merged with business models and regulatory considerations presents a balanced perspective of commercial mobile satellite systems. This book will be of interest to practicing engineers in mobile satellite communications and mobile broadcasting, research and development professionals working in these areas, mobile satellite service providers and operators. Academics and students studying satellite systems/technology, specialists in other classes of satellite systems, technical and marketing managers, strategists and planners of telecommunication systems: individuals interested in mobile communications, satellite and telecommunications/broadcasting technology will also find this book insightful. Key Features: Comprehensive treatment of mobile satellite communications topics, including radio link aspects, satellite constellations, architectural and operational aspects, as well as business planning models, MSS radio interface standards, spectrum forecast methodologies and system examples. Addresses related themes such as mobile broadcasting, mobile VSATs, search and rescue, and navigation systems. Introduces emerging technologies such as mobile broadband, television broadcasting to handheld units, advanced capacity enhancement techniques, hybrid system architecture concepts, including a rich sample of research topics such as multiple input multiple output, satellite-based ad-hoc networks, and highlights initiatives in the use of Q/V frequency bands. Includes revision questions at the end of each chapter. An accompanying website for interaction (www.satellitesandyou.com).

Revised and enlarged version that discusses how to design a mobile communications system. Comprehensively examines the mobile radio environment. Covers prediction of propagation loss, calculation and methods of reducing fades, interference, frequency plans and associated schemes, design parameters, signaling and channel access, cellular CDMA, microcell systems, and miscellaneous related systems. Contains chapter-by-chapter references and problems.

Provides a thorough introduction to the development, operation, maintenance, and troubleshooting of mobile communications systems    Mobile Communications Systems Development: A Practical Approach for System Understanding, Implementation and Deployment  is a comprehensive “how to” manual for mobile communications system design, deployment, and support. Providing a detailed overview of end-to-end system development, the book encompasses operation, maintenance, and troubleshooting of currently available mobile communication technologies and systems. Readers are introduced to different network architectures, standardization, protocols, and functions including 2G, 3G, 4G, and 5G networks, and the 3GPP standard.  In-depth chapters cover the entire protocol stack from the Physical (PHY) to the Application layer, discuss theoretical and practical considerations, and describe software implementation based on the 3GPP standardized technical specifications. The book includes figures, tables, and sample computer code to help readers thoroughly comprehend the functions and underlying concepts of a mobile communications network. Each chapter includes an introduction to the topic and a chapter summary. A full list of references, and a set of exercises are also provided at the end of the book to test comprehension and strengthen understanding of the material. Written by a respected professional with more than 20 years’ experience in the field, this highly practical guide:  Provides detailed introductory information on GSM, GPRS, UMTS, and LTE mobile communications systems and networks Describes the various aspects and areas of the LTE system air interface and its protocol layers Covers troubleshooting and resolution of mobile communications systems and networks issues Discusses the software and hardware platforms used for the development of mobile communications systems network elements Includes 5G use cases, enablers, and architectures that cover the 5G NR (New Radio) and 5G Core Network  Mobile Communications Systems Development  is perfect for graduate and postdoctoral students studying mobile communications and telecom design, electronic engineering undergraduate students in their final year, research and development engineers, and network operation and maintenance personnel.

Taking an in-depth look at the mobile communications ecosystem, this book covers the two key components, i.e., Network and End-User Devices, in detail. Within the network, the sub components of radio access network, transmission network, core networks, services and OSS are discussed; component level discussion also features antenna diversity and interference cancellation techniques for smart wireless devices. The role of various standard development organizations and industry forums is highlighted throughout. The ecosystem is strengthened with the addition of the Technology Management (TM) component dealing mostly with the non-technical aspects of the underlying mobile communications industry. Various aspects of TM including technology development, innovation management, knowledge management and more are also presented. Focuses on OFDM-based radio technologies such as LTE & WiMAX as well as MBWA (Mobile Broadband Wireless Access) Provides a vital addition to the momentum of EVDO and its migration towards LTE Emphasis on radio, core, operation, architectural and performance aspects of two next generation technologies – EPS and WiMAX Includes discussion of backhaul technologies and alternatives as well as issues faced by operators switching to 3G and Next Generation Mobile Networks Cutting-edge research on emerging Gigabit Ethernet Microwave Radios and Carrier Ethernet transport technologies Next Generation Mobile Communications Ecosystem serves as a practical reference for telecom associated academia and industry to understanding mobile communications in a holistic manner, as well as assisting in preparing graduate students and fresh graduates for the marketplace by providing them with information not only on state-of-the-art technologies and standards but also on TM. By effectively focusing on the key domains of TM this book will further assist companies with improving their competitiveness in the long run. Importantly, it will provide students, engineers, researchers, technology managers and executives with extensive details on various emerging mobile wireless standards and technologies.

With a Preface by noted satellite scientist Dr. Ahmad Ghais, the Second Edition reflects the expanded user base for this technology by updating information on historic, current, and planned commercial and military satellite systems and by expanding sections that explain the technology for non-technical professionals. The book begins with an introduction to satellite communications and goes on to provide an overview of the technologies involved in mobile satellite communications, providing basic introductions to RF Issues, power Issues, link issues and system issues. It describes early commercial mobile satellite communications systems, such as Marisat and Marecs and their military counterparts. The book then discusses the full range of Inmarsat and other current and planned geostationary, low earth orbiting and hybrid mobile satellite systems from over a dozen countries and companies. It is an essential guide for anyone seeking a comprehensive understanding of this industry and military tool. • Revised edition will serve both technical and non-technical professionals who rely every day on mobile satellite communications • Describes and explains historic, current, and planned civil, commercial, and military mobile satellite communication systems. • First Edition charts and tables updated and expanded with current material for today’s mobile satellite technology

Orthogonal frequency-division multiplexing (OFDM) is a method of digital modulation in which a signal is split into several narrowband channels at different frequencies. CDMA is a form of multiplexing, which allows numerous signals to occupy a single transmission channel, optimising the use of available bandwidth. Multiplexing is sending multiple signals or streams of information on a carrier at the same time in the form of a single, complex signal and then recovering the separate signals at the receiving end. Multi-Carrier (MC) CDMA is a combined technique of Direct Sequence (DS) CDMA (Code Division Multiple Access) and OFDM techniques. It applies spreading sequences in the frequency domain. Wireless communications has witnessed a tremendous growth during the past decade and further spectacular enabling technology advances are expected in an effort to render ubiquitous wireless connectivity a reality. This technical in-depth book is unique in its detailed exposure of OFDM, MIMO-OFDM and MC-CDMA. A further attraction of the joint treatment of these topics is that it allows the reader to view their design trade-offs in a comparative context. Divided into three main parts: Part I provides a detailed exposure of OFDM designed for employment in various applications Part II is another design alternative applicable in the context of OFDM systems where the channel quality fluctuations observed are averaged out with the aid of frequency-domain spreading codes, which leads to the concept of MC-CDMA Part III discusses how to employ multiple antennas at the base station for the sake of supporting multiple users in the uplink Portrays the entire body of knowledge currently available on OFDM Provides the first complete treatment of OFDM, MIMO(Multiple Input Multiple Output)-OFDM and MC-CDMA Considers the benefits of channel coding and space time coding in the context of various application examples and features numerous complete system design examples Converts the lessons of Shannon’s information theory into design principles applicable to practical wireless systems Combines the benefits of a textbook with a research monograph where the depth of discussions progressively increase throughout the book This all-encompassing self-contained treatment will appeal to researchers, postgraduate students and academics, practising research and development engineers working for wireless communications and computer networking companies and senior undergraduate students and technical managers.

Кнопка PTT V 60 от известного производителя Falco Communications System. Используется для подключения Активных тактических стрелковых наушников FMA FCS AMP, а также наушников других производителей с коннектором интерфейса NATO U-174/u (особенныйная "military" распайка проводов) к одной или двум радиостанциям.

В комплект поставки Кнопки PTT V60 входит один адаптер подключения к радиостанциям с 6-пиновым интерфейсом. Дополнительно у нас можно приобрести адаптеры для радиостанций Kenwood/BAOFENG, Motorola XTS и Hytera.

Кнопка PTT V60 оснащена боковыми клавишами отдельной активации двух радиостанций. Клавиши на фронтальной стороне Кнопки PTT V60 не функциональны и являются элементом дизайна.

Для размещения Кнопки PTT V60 на снаряжении имеется клипса крепления под MOLLE-систему (три ряда). Клипса съемная, возможно установить на кнопке в перевернутом виде.

Поверхность корпуса Кнопки PTT V60 имеет стойкое к истираню резиновое покрытие.
Характеристики:
Вес: 120 г.

Внимание!
Если при подключении кнопки PTT к наушникам и радиостанции звук от рации отсутствует, или очень слабый, а реакции на кнопку вызова на PTT нет, то значит при подключении перепутаны местами провода. Поменяйте местами, идущие в комплекте к PTT провода, и повторите подключение.

Габариты: 79х62х25 мм
Комплектация:
Кнопка PTT V60 FCS, защитный пластиковый кейс, руководство пользователя на английском и китайском языке, коннектор подключения наушников с интерфейсом NATO U-174/u, адаптер подключения к радиостанциям с 6-пиновым интерфейсом, резиновые заглушки разъемов

Benefiting from both time-domain and frequency-domain signal processing techniques, multicarrier systems have the potential for achieving high spectral-efficiency, high-flexibility and low-complexity wireless communications. Multicarrier techniques therefore constitute the promising techniques for implementation of future generations of wideband, broadband and ultra-wideband systems. Multicarrier Communications offers comprehensive and in-depth evaluation of numerous topics in the area, covering the fundamental principles of spread-spectrum and multicarrier CDMA as well as more advanced topics such as multiuser detection (MUD), multiuser transmitter preprocessing (MUTP), MIMO and space-time processing. It examines OFDM and various multicarrier CDMA within an unified framework and provides analytical approaches and formulas for error-performance evaluation of numerous multicarrier systems. Examines MUD and MUTP in parallel to illustrate the strong duality between receiver optimization and transmitter optimization Comprehensively establishes the theory of noncoherent MUD and noncoherent interference suppression Details the body of knowledge on MIMO theory and space-time multicarrier communications Contains tables, diagrams and figures to illustrate the performance results. Practicing electrical engineers and researchers in wireless communications will find Multicarrier Communications an invaluable guide. It will also be of interest to senior undergraduate and graduate students on wireless communications courses.