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Author: Ali Zarei Ghanavati Publisher: ISBN: Category : Languages : en Pages : 113
Book Description
One of the main issues of wireless communication systems is to cope with random variationof their channel conditions. In many wireless communication systems, the receiver estimatesthe channel for symbol detection. It is usually assumed that channel estimation is perfect,but in practice, channel estimation error (CEE) can become signicant and can degrade theperformance of wireless communication systems. This thesis addresses the eects of channelestimation error in two contexts: CEE in cooperative communication systems and CEE inlink layer performance.Cooperative diversity, which has been recently presented as an eective way of mitigatingthe eect of deep fades in wireless channels and improving spectral and power eciencyof the wireless networks, is considered in the rst part of this dissertation. Taking intoconsideration the presence of CEE, part I of this thesis analyzes a few cooperative communicationsystem models, which display dierent levels of practicality and represent largeclasses of cooperative systems in the literature. This thesis spells out delineating aspectsof these models and rigorously compares their error probabilities. Furthermore, a novelsignal detection scheme in the presence of CEE is presented for large classes of cooperativecommunication systems.Part II of this dissertation focuses on cross layer issues between the physical and linklayers of wireless communication systems. In particular, the frame error probability (FEP)is derived for a wireless communication system over fading channels in the presence ofCEE. Part II also explores the issue of optimizing bit transmission power for minimizing theexpected energy required to reliably deliver a frame to the destination node through an ARQmechanism over a fading channel. Also, an optimization algorithm is designed to minimizethe expected energy for reliable delivery of a frame for the systems under consideration.
Author: Ali Zarei Ghanavati Publisher: ISBN: Category : Languages : en Pages : 113
Book Description
One of the main issues of wireless communication systems is to cope with random variationof their channel conditions. In many wireless communication systems, the receiver estimatesthe channel for symbol detection. It is usually assumed that channel estimation is perfect,but in practice, channel estimation error (CEE) can become signicant and can degrade theperformance of wireless communication systems. This thesis addresses the eects of channelestimation error in two contexts: CEE in cooperative communication systems and CEE inlink layer performance.Cooperative diversity, which has been recently presented as an eective way of mitigatingthe eect of deep fades in wireless channels and improving spectral and power eciencyof the wireless networks, is considered in the rst part of this dissertation. Taking intoconsideration the presence of CEE, part I of this thesis analyzes a few cooperative communicationsystem models, which display dierent levels of practicality and represent largeclasses of cooperative systems in the literature. This thesis spells out delineating aspectsof these models and rigorously compares their error probabilities. Furthermore, a novelsignal detection scheme in the presence of CEE is presented for large classes of cooperativecommunication systems.Part II of this dissertation focuses on cross layer issues between the physical and linklayers of wireless communication systems. In particular, the frame error probability (FEP)is derived for a wireless communication system over fading channels in the presence ofCEE. Part II also explores the issue of optimizing bit transmission power for minimizing theexpected energy required to reliably deliver a frame to the destination node through an ARQmechanism over a fading channel. Also, an optimization algorithm is designed to minimizethe expected energy for reliable delivery of a frame for the systems under consideration.
Author: Sailesh Bharati Publisher: Springer ISBN: 3319587218 Category : Technology & Engineering Languages : en Pages : 124
Book Description
This book presents link-layer cooperative frameworks to improve transmission reliability and network throughput of distributed TDMA MAC protocols in vehicular ad hoc networks (VANETs). The main objective of this book is to present link-layer node cooperation schemes to enhance the link-layer performance of vehicular networks, in terms of reliability and system throughput. The authors present approaches proposed for the medium access control (MAC) and node cooperation in VANETs. The authors also cover cooperative ADHOC MAC for point-to-point communication between a pair of source and destination nodes, and cooperative relay broadcasting for broadcast services in this book. The performance of node cooperation frameworks is evaluated via mathematical analysis and computer simulations, in comparison with distributed TDMA MAC protocols without cooperation. The proposed node cooperation frameworks enhance the performance of distributed TDMA MAC and make it more robust to tackle the dynamic networking conditions in VANETs. Furthermore, with cooperation enabled transmission, the performance of distributed TMDA MAC is more suitable to support the wide range of mobile applications and their strict service requirements which is discussed in this book. The proposed node cooperation schemes and distributed cooperation decisions can be extended to wireless systems other than distributed TDMA MAC, such as cellular communication, for vehicular communications introduced in this book. This book is useful for researchers from academia and industry, as well as advanced level students interested in vehicular communication networks. It is also useful for professionals and engineers developing applications that use cooperative wireless communication systems.
Author: Mohammad Jafar Taghiyar Renani Publisher: ISBN: Category : Wireless communication systems Languages : en Pages : 122
Book Description
Space-time coding has demonstrated that the deployment of multiple antennas at the transmitter allows for simultaneous increase in throughput and reliability. However, the use of antenna arrays is impractical for deployment in some practical scenarios. Therefore, cooperative diversity has been recently introduced for realizing transmit diversity. Most of the literature in cooperative diversity assume perfect channel state information (CSI). However, in practice, imperfect CSI should be considered. In this thesis, we first investigate the performance of cooperative communications with imperfect CSI, where the channel estimates are obtained by pilot symbols. We present an exact bit error probability expression in the presence of channel estimation errors. We also study the effect of imperfect CSI in two-way multi-relay cooperative networks when the max-min relay selection is used. We derive an exact expression for the outage probability based on which a novel optimum power allocation scheme is proposed.
Author: Khoa N. Le Publisher: Springer Nature ISBN: 3030553663 Category : Technology & Engineering Languages : en Pages : 213
Book Description
This book studies the vulnerability of wireless communications under line-of-sight (LoS) and non-LoS correlated fading environments. The authors theoretically and practically provide physical layer security analyses for several technologies and networks such as Fifth-Generation (5G) networks, Internet of Things (IoT) applications, and Non-orthogonal multiple access (NOMA). The authors have provided these under various practical scenarios, and developed theoretical aspects to validate their proposed applications. Presents physical layer security (PLS) under correlated fading environments, 5G wireless networks, and NOMA networks; Provides end-to-end analyses, combination of channel correlation and outdated CSI and their effects on PL; Includes contributions of PLS research written by global experts in academia and industry.
Author: Xiangyun Zhou Publisher: CRC Press ISBN: 1466567015 Category : Computers Languages : en Pages : 308
Book Description
Physical Layer Security in Wireless Communications supplies a systematic overview of the basic concepts, recent advancements, and open issues in providing communication security at the physical layer. It introduces the key concepts, design issues, and solutions to physical layer security in single-user and multi-user communication systems, as well as large-scale wireless networks. Presenting high-level discussions along with specific examples, and illustrations, this is an ideal reference for anyone that needs to obtain a macro-level understanding of physical layer security and its role in future wireless communication systems.
Author: Tim Schenk Publisher: Springer Science & Business Media ISBN: 1402069030 Category : Technology & Engineering Languages : en Pages : 323
Book Description
This is one of the first books on the emerging research topic of digital compensation of RF imperfections. The book presents a new multidisciplinary vision on the design of wireless communication systems. In this approach the imperfections of the RF front-ends are accepted and digital signal processing algorithms are designed to suppress their impact on system performance. The book focuses on multiple-antenna orthogonal frequency division multiplexing (MIMO OFDM).
Author: Anna Maria Vegni Publisher: CRC Press ISBN: 1498721923 Category : Computers Languages : en Pages : 246
Book Description
A comprehensive text on both current and emerging areas of cognitive vehicular networks, this book focuses on a new class of mobile ad hoc networks. It uses a pedagogical approach utilizing cognitive aspects applied to vehicular environments and comprises contributions from well-known and high profile researchers in their respective specialties. The book provides significant technical and practical insights on different perspectives, starting from a basic background on cognitive radio, interrelated technologies, application to vehicular networks, technical challenges, and future trends.
Author: Gordon L. Stüber Publisher: Springer Science & Business Media ISBN: 1475762682 Category : Technology & Engineering Languages : en Pages : 670
Book Description
Principles of Mobile Communication provides an authoritative treatment of the fundamentals of mobile communications, one of the fastest growing areas of the modern telecommunications industry. The book stresses the fundamentals of mobile communications engineering that are important for the design of any mobile system. Less emphasis is placed on the description of existing and proposed wireless standards. This focus on fundamental issues should be of benefit not only to students taking formal instruction but also to practising engineers who are likely to already have a detailed familiarity with the standards and are seeking to deepen their knowledge of this important field. The book stresses mathematical modeling and analysis, rather than providing a qualitative overview. It has been specifically developed as a textbook for graduate level instruction and a reference book for practising engineers and those seeking to pursue research in the area. The book contains sufficient background material for the novice, yet enough advanced material for a sequence of graduate level courses. Principles of Mobile Communication treats a variety of contemporary issues, many of which have been treated before only in the journals. Some material in the book has never appeared before in the literature. The book provides an up-to-date treatment of the subject area at a level of detail that is not available in other books. Also, the book is unique in that the whole range of topics covered is not presently available in any other book. Throughout the book, detailed derivations are provided and extensive references to the literature are made. This is of value to the reader wishing to gain detailed knowledge of a particular topic.
Author: Matthieu Bloch Publisher: Cambridge University Press ISBN: 1139496298 Category : Technology & Engineering Languages : en Pages : 347
Book Description
This complete guide to physical-layer security presents the theoretical foundations, practical implementation, challenges and benefits of a groundbreaking new model for secure communication. Using a bottom-up approach from the link level all the way to end-to-end architectures, it provides essential practical tools that enable graduate students, industry professionals and researchers to build more secure systems by exploiting the noise inherent to communications channels. The book begins with a self-contained explanation of the information-theoretic limits of secure communications at the physical layer. It then goes on to develop practical coding schemes, building on the theoretical insights and enabling readers to understand the challenges and opportunities related to the design of physical layer security schemes. Finally, applications to multi-user communications and network coding are also included.
Author: K. J. Ray Liu Publisher: Cambridge University Press ISBN: 0521895138 Category : Computers Languages : en Pages : 643
Book Description
Presents the fundamentals of cooperative communications and networking with a holistic approach to principal topics where improvements can be obtained.
Author: Ali Zarei Ghanavati
Author: Ali Zarei Ghanavati
Author: Sailesh Bharati
Author: Mohammad Jafar Taghiyar Renani
Author: Khoa N. Le
Author: Xiangyun Zhou
Author: Tim Schenk
Author: Anna Maria Vegni
Author: Gordon L. Stüber
Author: Matthieu Bloch
Author: K. J. Ray Liu