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"Wireless communication systems Technological innovations."
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5G for the connected world
\"After the considerable success of LTE, why do we need a new system with a new radio and a new core? First, 5G will boost some of the LTE key performance indicators to a new horizon: capacity, latency, energy efficiency, spectral efficiency and reliability. We will describe the relevant radio and core features to enable optimizations (5G to be 10, 100 or 1000 times better than LTE) in these areas in respective chapters of the book\"-- Provided by publisher.
Radio Protocols for LTE and LTE-Advanced
by
Yi, SeungJune
,
Chun, SungDuck
,
Jung, SungHoon
in
Broadband communication systems
,
Communication, Networking and Broadcast Technologies
,
Long-Term Evolution (Telecommunications)
2012
This book offers a unique focus on radio protocols for LTE and LTE-Advanced, covering LTE Layer 2/3 radio protocols as well as new features including LTE-Advanced. From an expert author team directly involved in the 3GPP standards, the book is divided into two sections to differentiate between the two technologies.
Space Modulation Techniques
2018
<p><b>EXPLORES THE FUNDAMENTALS REQUIRED TO UNDERSTAND, ANALYZE, AND IMPLEMENT SPACE MODULATION TECHNIQUES (SMTs) IN COHERENT AND NON-COHERENT RADIO FREQUENCY ENVIRONMENTS</b> <p>This book focuses on the concept of space modulation techniques (SMTs), and covers those emerging high data rate wireless communication techniques. The book discusses the advantages and disadvantages of SMTs along with their performance. A general framework for analyzing the performance of SMTs is provided and used to detail their performance over several generalized fading channels. The book also addresses the transmitter design of these techniques with the optimum number of hardware components and the use of these techniques in cooperative and mm-Wave communications. <p>Beginning with an introduction to the subject and a brief history, <i>Space Modulation Techniques</i> goes on to offer chapters covering MIMO systems like spatial multiplexing and space-time coding. It then looks at channel models, such as Rayleigh, Rician, Nakagami-m, and other generalized distributions. A discussion of SMTs includes techniques like space shift keying (SSK), space-time shift keying (STSK), trellis coded spatial modulation (TCSM), spatial modulation (SM), generalized spatial modulation (GSM), quadrature spatial modulation (QSM), and more. The book also presents a non-coherent design for different SMTs, and a framework for SMTs' performance analysis in different channel conditions and in the presence of channel imperfections, all that along with an information theoretic treatment of SMTs. Lastly, it provides performance comparisons, results, and MATLAB codes and offers readers practical implementation designs for SMTs. The book also: <ul> <li>Provides readers with the expertise of the inventors of space modulation techniques (SMTs)</li> <li>Analyzes error performance, capacity performance, and system complexity.</li> <li>Discusses practical implementation of SMTs and studies SMTs with cooperative and mm-Wave communications</li> <li>Explores and compares MIMO schemes</li> </ul> <p><i>Space Modulation Techniques</i> is an ideal book for professional and academic readers that are active in the field of SMT MIMO systems.
Autonomous airborne wireless networks
\"Airborne networks have led to the development of a range of applications including surveillance and monitoring, military and rescue operations. Whilst the conventional focus on airborne networks revolves around control, trajectory optimization and navigation, its application for providing communications has recently emerged and is developing at a very fast pace. With contributions from international experts, this book explores recent advances in the theory and practice of airborne wireless networks for the next generation of wireless networks to support various applications including emergency communications, coverage and capacity expansion, Internet of Things, information dissemination, future healthcare, pop-up networks, etc.\"-- Provided by publisher.
A detailed Study of 4G in Wireless Communication
2013,2014
As a promising technique, OFDM has been widely used in emerging broadband communication systems, such as digital audio broadcasting (DAB), high-definition television (HDTV), and wireless local area network (IEEE 802.11a and HIPERLAN/2). However, as the OFDM signals are the sum of signals with random amplitude and phase, they are likely to have large PAPR that require a linear high-power- amplifier (HPA) with an extremely high dynamic range which is expensive and inefficient. Furthermore, any amplifier nonlinearity causes intermodulation products resulting in unwanted out-of-band power. A number of approaches have been proposed to deal with the PAPR problem, including amongst others, clipping, clipping-and-filtering (CF), coding, companding transform, active constellation extension (ACE), selected mapping (SLM), and partial transmit sequence (PTS). This book proposes an improvement in the selected mapping technique. The resulting scheme can also be applied to the multiple transmitting antenna cases. Further, it compares the simulation results to the existing techniques namely exponential companding transform, repeated clipping and filtering, and adaptive active constellation extension. Auszug aus dem Text Text Sample: Chapter 2.1, Different methods for Peak-to-Average Power (PAPR) Reduction in Orthogonal Frequency Division Multiplexing (OFDM): Himanshu Bhushan Mishra et al.in 2012 proposed a new Selective-Mapping (SLM) technique in WIMAX without side information which is the major issue in the classical SLM Technique. In this paper the PAPR performance is measured using complementary cumulative distribution function (CCDF) plot and the probability of SI detection error performance have been evaluated as the criteria for WiMAX standard IEEE 802.16e. WiMAX with its standard IEEE 802.16d/e is the advanced technology used for long range communication
with high data rate. It is well known that the Orthogonal Frequency Division Multiplexing (OFDM) is a promising technique for getting high data rates in a multipath fading environment. Hence, the physical layer of WiMAX uses OFDM. But the main disadvantage of OFDM is the high peak to average power ratio (PAPR). In this paper PAPR reduction is achieved using selected mapping (SLM) technique and simultaneously without sending the side information (SI) along with the OFDM symbol [1]. E. Al-Dalakta et al. in 2012 proposed an efficient technique for reducing the bit error rate (BER) of Orthogonal Frequency Division Multiplexing (OFDM) signals transmitted over nonlinear solid-state power amplifiers (SSPAs).The proposed technique is based on predicting the distortion power that an SSPA would generate due to the nonlinear characteristics of such devices. Similar to the Selective-Mapping (SLM) or Partial-Transmit-Sequence (PTS) schemes, the predicted distortion is used to select a set of phases that minimize the actual SSPA distortion. Simulation results confirmed that the signal-to-noise ratio that is required to obtain a BER of ∼〖10〗^ (-4) using the proposed technique is less by about 8 dB when it is compared to the standard PTS utilizing 16 partitions. Moreover, complexity analysis demonstrated that the proposed system offers a significant complexity reduction of about 60% compared to state-of-the-art methods. This work demonstrated that less direct PAPR indicators can provide better performance when combined with distortion less techniques such as PTS and SLM. Therefore, the proposed techniques are optimized to combat the consequences of high PAPR rather than reducing the PAPR itself. The proposed techniques are based on using the distortion level to select the optimal PTS and SLM system parameters [2]. Shiann-Shiun Jeng et al. in 2011 proposes a new
method based on companding Peak-to-Average Power Ratio (PAPR) Reduction of Orthogonal Frequency Division Multiplexing (OFDM) signals. This paper suggests that uniformly distributed companding scheme and piecewise companding scheme cannot deliver the performance that satisfies various requirements of the system. So, the distribution of the OFDM signal is transformed into the trapezium distribution and the general formulas for the proposed scheme are derived that enable the de- sired performance to be achieved by controlling the parameter. The simulation results reveal that the proposed scheme may offer the more efficient PAPR reduction or the lower BER than the uniformly-distributed and piecewise schemes under the condition of efficient PAPR reduction or efficient BER performance [3]. Suma M N et al. gives a survey on developments in OFDM so far. He suggested that apart from high Peak-to-Average Power Ratio (PAPR) there are many more techniques that are needed to increase the performance of OFDM systems like interference cancellation, phase noise mitigation, Synchronization among carriers and post equalization. In today's communication scenario, high data rate single-carrier transmission may not be feasible due to too much complexity of the equalizer in the receiver. To overcome the frequency selectivity of the wide band channel experienced by single-carrier transmission, multiple carriers can be used for high rate data transmission. Orthogonal Frequency Division Multiplexing (OFDM), is multicarrier system which has become a modulation in physical layer of next generation WiMAX, LTE system. In this work effort is made to present challenges in OFDM and work done so far in channel equalization and different transforms used in OFDM system like Discrete Fourier Transform (DFT) Based OFDM, Discrete Cosine Transform (DCT) Based OFDM, Wavelet based and
Wavelet packet based OFDM, Discrete Hartley Transform (DHT) Based OFDM, and Coded OFDM which includes Turbo codes and Alamouti codes [4]. Jun Hou et al. proposed a nonlinear companding scheme to reduce the Peak-to-Average Power Ratio (PAPR) and improve Bit Error Rate (BER) for OFDM systems. This proposed scheme mainly focuses on compressing the large signals, while maintaining the average power constant by properly choosing transform parameters. Moreover, analysis shows that the proposed scheme without decompanding at the receiver can also offer a good BER performance. Finally, simulation results show that the proposed scheme outperforms other companding scheme in terms of spectrum side-lobes, PAPR reduction and BER performance [5]. Yuan Jiang in 2010 suggest a new companding algorithm that offers improved performance in terms of BER and OBI while reducing PAPR effectively. Orthogonal Frequency Division Multiplexing (OFDM) mitigates the effect of inter symbol interference (ISI) but it suffers from inter-block interference (IBI).A good remedy for the OBI is companding. This paper proposes and evaluates a new companding algorithm. This work uses the special airy function and is able to offer an improved bit error rate (BER) and minimized OBI while reducing PAPR effectively [6]. Kitaek Bae et al. in 2010 proposed a new method for Peak-to-Average Power Ratio (PAPR) Reduction in Orthogonal Frequency Division Multiplexing (OFDM), a novel Active Constellation Extension (ACE) algorithm with adaptive clipping control namely Adaptive ACE which is an improvement in the technique based on the combination of two techniques namely clipping and Active Constellation Extension (ACE) known as Clipping-Based Active Constellation Extension (CB-ACE) technique. This work suggests that CB-ACE cannot achieve the minimum PAR when the target clipping level is set below an
initially unknown optimum value. To overcome this low clipping ratio problem, Adaptive ACE is proposed. Simulation results demonstrate that proposed algorithm can reach the minimum PAR for severely low clipping ratios. In addition, the trade-off between PAR and the loss in E_b⁄N_o over an AWGN channel in terms of the clipping ratio has also been described [7]. Biographische Informationen Mrs Neelam Dewangan is an assistant professor at Chhatrapati /shivaji Institute of Technology, Durg. She has completed her M.Tech in communication engineering from the Chhatrapati /shivaji Institute of Technology, and under the supervision of Mr. Mangal Singh, the professor and head of the Institute. Moreover, she has published many papers and attended many conferences in her area of interest including wireless communication, 4G, LTE, and mobile communication.
Ultra-Dense Networks for 5G and Beyond
by
Duong, Trung Q.
,
Chu, Xiaoli
,
Suraweera, Himal A.
in
Communication, Networking and Broadcast Technologies
,
Components, Circuits, Devices and Systems
,
Computing and Processing
2019
<p><b>OFFERS COMPREHENSIVE INSIGHT INTO THE THEORY, MODELS, AND TECHNIQUES OF ULTRA-DENSE NETWORKS AND APPLICATIONS IN 5G AND OTHER EMERGING WIRELESS NETWORKS</b> <p>The need for speed—and power—in wireless communications is growing exponentially. Data rates are projected to increase by a factor of ten every five years—and with the emerging Internet of Things (IoT) predicted to wirelessly connect trillions of devices across the globe, future mobile networks (5G) will grind to a halt unless more capacity is created. This book presents new research related to the theory and practice of all aspects of ultra-dense networks, covering recent advances in ultra-dense networks for 5G networks and beyond, including cognitive radio networks, massive multiple-input multiple-output (MIMO), device-to-device (D2D) communications, millimeter-wave communications, and energy harvesting communications. <p>Clear and concise throughout,<i> Ultra-dense Networks for 5G and Beyond: Modelling, Analysis, and Applications</i> offers comprehensive coverage on such topics as network optimization; mobility, handoff control, and interference management; and load balancing schemes and energy saving techniques. It delves into the backhaul traffic aspects in ultra-dense networks and studies transceiver hardware impairments and power consumption models in ultra-dense networks. The book also examines new IoT, smart-grid, and smart-city applications, as well as novel modulation, coding, and waveform designs. <ul> <li>One of the first books to focus solely on ultra-dense networks for 5G</li> <li>Covers advanced architectures, self-organizing protocols, resource allocation, user-base station association, synchronization, and signalling</li> <li>Examines the current state of cell-free massive MIMO, distributed massive MIMO, and heterogeneous small cell architectures</li> <li>Offers network measurements, implementations, and demos</li> <li>Looks at wireless caching techniques, physical layer security, cognitive radio, energy harvesting, and D2D communications in ultra-dense networks</li> </ul> <p><i>Ultra-dense Networks for 5G and Beyond: Modelling, Analysis, and Applications</i> is an ideal reference for those who want to design high-speed, high-capacity communications in advanced networks, and will appeal to postgraduate students, researchers, and engineers in the field.
Advanced multicarrier technologies for future radio communication : 5G and beyond
\"A practical review of state-of-the-art non-contiguous multicarrier technologies that are revolutionizing how data is transmitted, received, and processed This book addresses the advantages and the limitations of modern multicarrier technologies and how to meet the challenges they pose using non-contiguous multicarrier technologies and novel algorithms that enhance spectral efficiency, interference robustness, and reception performance. It explores techniques using non-contiguous subcarriers which allow for flexible spectrum aggregation while achieving high spectral efficiency and flexible transmission and reception at lower OSI layers. These include non-contiguous orthogonal frequency division multiplexing (NC-OFDM), its enhanced version, non-contiguous filter-bank-based multicarrier (NC-FBMC), and generalized multicarrier. Following an overview of current multicarrier technologies for radio communication, the authors examine particular properties of these technologies that allow for more efficient usage within key directions of 5G. They examine the principles of NC-OFDM and discuss efficient transmitter and receiver design. They present the principles of FBMC modulation and discuss key challenges for FBMC communications while comparing performance results with traditional OFDM. They move on from there to a fascinating discussion of GMC modulation within which they clearly demonstrate how that technology encompasses all of the advantages of previously discussed techniques, as well as all imaginable multi- and single-carrier waveforms.; Addresses the problems and limitations of current multicarrier technologies (OFDM) Describes innovative techniques using non-contiguous multicarrier waveforms as well as filter-band based and generalized multicarrier waveforms Provides a thorough review of the practical limitations and solutions for evolving and breakthrough 5G communication technologies Explores the future outlook for non-contiguous multicarrier technologies as regards their greater industrial realization, hardware practicality, and other challenges Advanced Multicarrier Technologies for Future Radio Communication: 5G and Beyondis an indispensable working resource fortelecommunication engineers, researchers and academics, as well as graduate and post-graduate students of telecommunications. At the same time, it provides a fascinating look at the shape of things to come for telecommunication industry executives, telecom operators, regulators, policy makers, and economists. \"-- Provided by publisher.
Advanced Wireless Communications and Internet
by
Glisic, Savo G
in
Aerospace
,
Applied physics
,
Communication, Networking and Broadcast Technologies
2011
\"The new edition of Advanced Wireless Network: Cognitive, Cooperative & Opportunistic 4G Technology, 2nd Edition, including the latest developments In the evolution of wireless communications, the dominant challenges are in the areas of networking and their integration with the Future Internet. Even the classical concept of cellular networks is changing and new technologies are evolving to replace it. To reflect these new trends,Advanced Wireless Communications & INTERNET builds upon the previous volumes, enhancing the existing chapters, and including a number of new topics. Systematically guiding readers from the fundamentals through to advanced areas, each chapter begins with an introductory explanation of the basic problems and solutions followed with an analytical treatment in greater detail. The most important aspects of new emerging technologies in wireless communications are comprehensively covered including: next generation Internet; cloud computing and network virtualization; economics of utility computing and wireless grids and clouds. This gives readers an essential understanding of the overall environment in which future wireless networks will be operating. Furthermore, a number of methodologies for maintaining the network connectivity, by using tools ranging from genetic algorithms to stochastic geometry and random graphs theory, and a discussion on percolation and connectivity, are also offered. The book includes a chapter on network formation games, covering the general models, knowledge based network formation games, and coalition games in wireless ad hoc networks. Illustrates points throughout using real-life case studies drawn from the author's extensive international experience in the field of telecommunications Fully updated to include the latest developments, key topics covered include: Advanced routing and network coding; Network stability control; Relay-assisted Wireless Networks; Multicommodity flow optimization problems, flow optimization in heterogeneous networks, and dynamic resource allocation in computing clouds Methodically guides readers through each topic from basic to advanced areas Focuses on system elements that provide adaptability and re-configurability, and discusses how these features can improve wireless communications system performance\"--
\"The concept of the book will be organized within the framework of wireless access to future internet, so that a number of topics above physical layer will be added\"--