Автор: Bannour Ahmed; Mohammad Abdul Matin Название: Coding for MIMO-OFDM in Future Wireless Systems ISBN: 3319191527 ISBN-13(EAN): 9783319191522 Издательство: Springer Рейтинг: Цена: 7978.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Orthogonal frequency division multiplexing (OFDM) has been adopted in the wireless local-area network standards IEEE 802.11a due to its high spectral efficiency and ability to deal with frequency selective fading.
Описание: Orthogonal frequency division multiplexing (OFDM) is an attractive physical layer waveform candidate for wireless broadband communication. Apart from being spectrally efficient with overlapping subcarriers, the OFDM system enables simplified equalization at the receiver and effectively combats the inter-block interference with cyclic prefix. For achieving low peak-to-average power ratio (PAPR) in the uplink, single carrier frequency domain multiple access (SC-FDMA) is used for fourth-generation (4G), long term evolution (LTE). SC-FDMA achieves low PAPR compared to OFDMA using discrete Fourier transform (DFT) precoding. This book introduces both OFDM and SC-FDMA, similarities, and differences between their transmitter and receiver operations, time-frequency representations, and low complexity joint equalization and CFO compensation (JECC), etc. Advanced waveform candidates such as Filtered OFDM, FBMC, GFDM, etc. are also introduced. To improve the throughput of existing mobile communication, non-orthogonal multiple access (NOMA) system configurations based on OFDM are also covered.
Essentially, the performance of both the OFDMA and SC-FDMA is very sensitive to the presence of carrier frequency offset (CFO) arising from synchronization errors, Doppler, and manufacturing defects. This is because the multicarrier structure and the channel decomposition at the receiver based on DFT lose its optimal performance in the presence of CFO. This book discusses an elegant time-frequency signal processing tool for this purpose called fractional Fourier transform (FRFT). A discrete version of FRFT (or DFRFT) employing a chirp basis in place of the complex exponential basis of DFT can easily replace the existing multicarrier modulation/demodulation and channel decomposition. A detailed performance evaluation of the DFRFT based OFDM system that can significantly outperform the conventional DFT based OFDM system is also given. The study presented involves a detailed interference analysis of the DFRFT based OFDM system in the presence of CFO. This inter carrier interference (ICI) analysis is then used to devise Low complexity JECC for DFRFT based OFDM. Through the study and result presented in this book, the use of the DFRFT based OFDM system is motivated for wireless mobile communication especially in the presence of CFO.
Название: Ofdm For Wireless Communications Systems ISBN: 1580537960 ISBN-13(EAN): 9781580537964 Издательство: Artech House Рейтинг: Цена: 15338.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: The author offers today's wireless professionals a complete understanding of OFDM technology and its applications in wireless communications systems.
Автор: Cheng Название: Cooperative OFDM Underwater Acoustic Communications ISBN: 3319332066 ISBN-13(EAN): 9783319332062 Издательство: Springer Рейтинг: Цена: 14818.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание:
Following underwater acoustic channel modeling, this book investigates the relationship between coherence time and transmission distances. It considers the power allocation issues of two typical transmission scenarios, namely short-range transmission and medium-long range transmission. For the former scenario, an adaptive system is developed based on instantaneous channel state information. The primary focus is on cooperative dual-hop orthogonal frequency division multiplexing (OFDM).
This book includes the decomposed fountain codes designed to enable reliable communications with higher energy efficiency. It covers the Doppler Effect, which improves packet transmission reliability for effective low-complexity mirror-mapping-based intercarrier interference cancellation schemes capable of suppressing the intercarrier interference power level.
Designed for professionals and researchers in the field of underwater acoustic communications, this book is also suitable for advanced-level students in electrical engineering or computer science.
Автор: Milica Pejanovic-Djurisic, Enis Kocan, Ramjee Prasad Название: OFDM Based Relay Systems for Future Wireless Communications ISBN: 8792329276 ISBN-13(EAN): 9788792329271 Издательство: Taylor&Francis Рейтинг: Цена: 14851.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Relay systems have become a subject of intensive research interest over the recent years, as it is recognized that they can improve performances and extend the coverage area of wireless communication systems. Special attention has been dedicated to them since the proposal appeared for their implementation in mobile cellular systems. Numerous researches conducted after that proposal have enabled incorporation of OFDM based relay systems in both accepted standards for IMT-Advanced systems. Nowadays, researches are ongoing with the aim to define new solutions for performance improvement of the standardized OFDM relay systems for cellular networks and one of the interesting solutions is implementation of subcarrier permutation (SCP) at the relay (R) station. The book "OFDM based relay systems for future wireless communications" presents a comprehensive research results in analyzing behavior and performance of the OFDM based relay systems with SCP. Dual-hop relay scenario with three communication terminals, and no direct link between the source (S) and the destination (D) has been analyzed, as it is compliant with the accepted solutions for IMT-Advanced systems. The book includes performance analysis and performance comparison of OFDM based: amplify-and-forward (AF) relay systems with fixed gain (FG), amplify-and-forward (AF) relay systems with variable gain (VG), decode-and-forward (DF) relay systems, each including two SCP schemes, known to maximize the system capacity and/or improve the bit error rate (BER) performances. Performance comparisons have enabled definition of optimal solutions for the future wireless communication systems in a given conditions, and for the given optimality criteria. OFDM based relay systems for future wireless communications contains recent research results in this area and is ideal for the academic staff and master/research students in area of mobile communication systems, as well as for the personnel in communication industry. Contents: 1. Introduction; 2. General overview of relay techniques; 3. OFDM relay systems; 4. Relay stations in wireless cellular networks; 5. Performance of OFDM AF FG relay systems with subcarrier permutation; 6. Performance of OFDM AF VG relay systems with subcarrier permutation; 7. Performance of OFDM DF relay systems with subcarrier permutation; List of Abbreviations
Автор: Zhou Название: OFDM for Underwater Acoustic Communications ISBN: 1118458869 ISBN-13(EAN): 9781118458860 Издательство: Wiley Рейтинг: Цена: 17099.00 р. Наличие на складе: Поставка под заказ.
Автор: Richard Van Nee Название: OFDM for Wireless Multimedia Communications ISBN: 0890065306 ISBN-13(EAN): 9780890065303 Издательство: Artech House Рейтинг: Цена: 18850.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: A study of OFDM, including a comparison with other forms of single carrier modulation methods. It provides the design guidelines for maximising the benefits from this technology. There is practical advice on how to plan, design and use OFDM to make wireless multimedia communications happen.
Автор: Hamid Hemmati Название: Near-Earth Laser Communications 2E ISBN: 1498777406 ISBN-13(EAN): 9781498777407 Издательство: Taylor&Francis Рейтинг: Цена: 35983.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: This reference provides an overview of near-earth laser communication theory developments including component and subsystem technologies, fundamental limitations, and approaches to reach those limits. It covers basic concepts and state-of-the-art technologies, emphasizing device technology, implementation techniques, and system trades.
Автор: Xiang Liu Название: Optical Communications in the 5G Era ISBN: 0128216271 ISBN-13(EAN): 9780128216279 Издательство: Elsevier Science Рейтинг: Цена: 18528.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Optical Communications in the 5G Era provides an up-to-date overview of the emerging optical communication technologies for 5G next-generation wireless networks. It outlines the emerging applications of optical networks in future wireless networks, state-of-the-art optical communication technologies, and explores new R&D opportunities in the field of converged fixed-mobile networks. Optical Communications in the 5G Era is an ideal reference for university researchers, graduate students, and industry R&D engineers in optical communications, photonics, and mobile and wireless communications who need a broad and deep understanding of modern optical communication technologies, systems, and networks that are fundamental to 5G and beyond.
Автор: Chen Chen, Xiang Cheng Название: Resource Allocation for OFDMA Systems ISBN: 3030193918 ISBN-13(EAN): 9783030193911 Издательство: Springer Рейтинг: Цена: 12196.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание:
This book introduces the sources and historic collection campaigns of resource allocation in wireless communication systems. The unique characteristics of MIMO-OFDMA systems are thoroughly studied and summarized. Remarks on resource allocation and spectrum sharing are also presented, which demonstrate the great value of resource allocation techniques, but also introduce distinct challenges of resource allocation in MIMO-OFDMA systems. Novel resource allocation techniques for OFDMA Systems are surveyed from various applications (e.g., for unicast, or multicast with Guaranteed BER and Rate, subcarrier and power allocation with various detectors, low-complexity energyefficient resource allocation, etc.) in this book.
Due to the high mobility and low latency requirements of 5G wireless communications, this book discusses how to deal with the imperfect CSI. It also discusses how to deal with e.g., throughput maximization, outage probabilities maximization and guarantee, energy efficiency, physical-layer security issues with feedback channel capacity constraints, in order to characterize and understand the applications of practical scenes.
This book will target professionals & researchers working in the fields of Wireless Communications and Networking, Resource Allocation and Transmissions. Advanced-level students in electrical engineering and computer science will also find this book useful as a secondary textbook.
Автор: Chen Chen, Cheng Xiang Название: Resource Allocation for Ofdma Systems ISBN: 3030193942 ISBN-13(EAN): 9783030193942 Издательство: Springer Рейтинг: Цена: 12196.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: 1. Introduction.- 2. Overview of OFDMA and MIMO Systems.- 3. Remarks on Resource Allocation.- 4. Resource Allocation for OFDMA Systems.- 5. Dealing with Imperfect CSI.- 6. Summary and Outlook.
Автор: Samuel C. Yang Название: OFDMA System Analysis and Design ISBN: 160807076X ISBN-13(EAN): 9781608070763 Издательство: Artech House Цена: 23839.00 р. Наличие на складе: Нет в наличии.
Описание: Here’s a unique resource that provides you with an up-to-date understanding of how to plan, analyze, and design next-generation broadband wireless networks. This comprehensive book includes all the necessary background information needed to fully understand the material and places emphasis on practical engineering know-how that can be readily applied to designing OFDM-based systems. You find detailed discussions on everything from the physical and media access control layers, to QoS and security functions. Rather than just offering simple explanations of standards, this invaluable book takes a close look at live, real-world systems, explaining how the technical features work and why they were adopted. Moreover, the author includes his own design frameworks and rules that have been developed through his own extensive research and experience. This comprehensive reference is supported with over 170 illustrations and more than 250 equations.
ООО "Логосфера " Тел:+7(495) 980-12-10 www.logobook.ru
