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Author: Mayank Jain
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Wireless networking is fast becoming the primary method for people to connect to the Internet and with each other. The available wireless spectrum is increasingly loaded, with users demanding higher performance and reliability from their wireless connections. This dissertation proposes single channel full-duplex as a new paradigm for wireless system design that can mitigate some of the throughput and reliability problems of today's wireless systems. With full-duplex wireless radios, a node can receive and transmit data at the same time, without using multiple wireless channels. At the physical layer, this capability can double the available throughput at a node. Further, sending and receiving at the same time allows a wireless node to exchange control messages while receiving data, making real-time feedback schemes possible. Such feedback, assumed to be impossible till now, allows network researchers to rethink the way wireless networks are designed. This dissertation shows that with the extra feedback channel available through full-duplexing, reliability in existing wireless networks can be significantly improved. Motivated by the promise that full-duplex wireless holds, this dissertation explores the challenges in implementing such radios and how these radios could influence the design of wireless networking stacks. The primary challenge in implementing a full-duplex wireless system is removing the self-interference from a node's transmit antenna to its receive antenna. This dissertation discusses various analog and digital techniques to cancel this self-interference. It presents an adaptive full-duplex wireless system that combines analog and digital self-interference cancellation to remove up to 73dB of self-interference. Exploiting full-duplexing to the fullest extent requires a redesign of higher layers, especially the MAC and network layers. This dissertation presents a full-duplex MAC layer implementation to show how full-duplexing can be leveraged to improve wireless reliability and performance. This implementation reduces hidden terminal losses by up to 88% and significantly improves network fairness and throughput. The main contribution of this dissertation is to motivate full-duplex radios as a direction for research on future wireless systems. It shows that designing full-duplex systems, while challenging, is feasible. It also presents many ideas on how full-duplexing could be used to improve a variety of wireless systems, including multi-hop data networks, cellular systems, and wireless LANs.
Author: Mayank Jain
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Wireless networking is fast becoming the primary method for people to connect to the Internet and with each other. The available wireless spectrum is increasingly loaded, with users demanding higher performance and reliability from their wireless connections. This dissertation proposes single channel full-duplex as a new paradigm for wireless system design that can mitigate some of the throughput and reliability problems of today's wireless systems. With full-duplex wireless radios, a node can receive and transmit data at the same time, without using multiple wireless channels. At the physical layer, this capability can double the available throughput at a node. Further, sending and receiving at the same time allows a wireless node to exchange control messages while receiving data, making real-time feedback schemes possible. Such feedback, assumed to be impossible till now, allows network researchers to rethink the way wireless networks are designed. This dissertation shows that with the extra feedback channel available through full-duplexing, reliability in existing wireless networks can be significantly improved. Motivated by the promise that full-duplex wireless holds, this dissertation explores the challenges in implementing such radios and how these radios could influence the design of wireless networking stacks. The primary challenge in implementing a full-duplex wireless system is removing the self-interference from a node's transmit antenna to its receive antenna. This dissertation discusses various analog and digital techniques to cancel this self-interference. It presents an adaptive full-duplex wireless system that combines analog and digital self-interference cancellation to remove up to 73dB of self-interference. Exploiting full-duplexing to the fullest extent requires a redesign of higher layers, especially the MAC and network layers. This dissertation presents a full-duplex MAC layer implementation to show how full-duplexing can be leveraged to improve wireless reliability and performance. This implementation reduces hidden terminal losses by up to 88% and significantly improves network fairness and throughput. The main contribution of this dissertation is to motivate full-duplex radios as a direction for research on future wireless systems. It shows that designing full-duplex systems, while challenging, is feasible. It also presents many ideas on how full-duplexing could be used to improve a variety of wireless systems, including multi-hop data networks, cellular systems, and wireless LANs.
Author: Tho Le-Ngoc
Publisher: Springer
ISBN: 3319576909
Category : Technology & Engineering
Languages : en
Pages : 170
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Book Description
This book introduces the development of self-interference (SI)-cancellation techniques for full-duplex wireless communication systems. The authors rely on estimation theory and signal processing to develop SI-cancellation algorithms by generating an estimate of the received SI and subtracting it from the received signal. The authors also cover two new SI-cancellation methods using the new concept of active signal injection (ASI) for full-duplex MIMO-OFDM systems. The ASI approach adds an appropriate cancelling signal to each transmitted signal such that the combined signals from transmit antennas attenuate the SI at the receive antennas. The authors illustrate that the SI-pre-cancelling signal does not affect the data-bearing signal. This book is for researchers and professionals working in wireless communications and engineers willing to understand the challenges of deploying full-duplex and practical solutions to implement a full-duplex system. Advanced-level students in electrical engineering and computer science studying wireless communications will also find this book useful as a secondary textbook.
Author: Jae Young Kim
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Single-channel full-duplex wireless is a radio technology that transmits and receives at the same time and on the same frequency band. It is a nascent and exciting field of research that provides new opportunities to greatly improve wireless networks. Traditional wireless systems isolate transmission and reception in time, such as in timedivision duplex (TDD), or in frequency, as in frequency-division duplex (FDD). This is necessary because huge self-interference from the transmitting antenna is usually millions of times stronger than the signal at the receiving antenna and it saturates the receiver analog-to-digital converter (ADC). However, feasibility of full-duplex radios has been recently demonstrated at the physical layer with off-the-shelf components. Since then, there has been a lot of progress towards the goal of suppressing the huge self-interference signal with clever multi-stage cancellation schemes. Existing full-duplex work focuses on the physical layer and has not yet deeply studied its impact on the the MAC layer. There are several proposals that provide simple extensions from CSMA/CA popularly used in WiFi networks, but experiments show that these extensions poorly utilize the full-duplex channel, falling far short of the projected theoretical 2x throughput increase. In order to make the most out of the unique characteristics of a full-duplex physical layer, it is important to design a clean-slate MAC layer. This dissertation presents Janus, a media access protocol for full-duplex wireless local area networks. By allowing nodes to simultaneously transmit and receive on the same band, full-duplex by itself provides at most a 100% throughput improvement over half-duplex networks. Janus demonstrates that a media access control protocol designed especially for full-duplex can allow a network to achieve even greater gains: experimental results with WARP software radios show improvements of 150%. Janus achieves these gains through three mechanisms: inexpensively maintaining real-time interference topology information, centralizing scheduling at access points to use this information while reducing control overhead, and an intelligent scheduling algorithm that maximizes full-duplex cooperations while simultaneously minimizing bitrate reductions from inter-client interference. The effectiveness of such a centralized media access protocol design suggests that full-duplex may benefit from revisiting and rethinking many long-held assumptions about wireless protocol design.
Author: Hirley Alves
Publisher: Springer Nature
ISBN: 9811529698
Category : Computers
Languages : en
Pages : 323
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Book Description
This book focuses on the multidisciplinary state-of-the-art of full-duplex wireless communications and applications. Moreover, this book contributes with an overview of the fundamentals of full-duplex communications, and introduces the most recent advances in self-interference cancellation from antenna design to digital domain. Moreover, the reader will discover analytical and empirical models to deal with residual self-interference and to assess its effects in various scenarios and applications. Therefore, this is a highly informative and carefully presented book by the leading scientists in the area, providing a comprehensive overview of full-duplex technology from the perspective of various researchers, and research groups worldwide. This book is designed for researchers and professionals working in wireless communications and engineers willing to understand the challenges and solutions full-duplex communication so to implement a full-duplex system.
Author: Liqun Fu
Publisher: Springer Nature
ISBN: 3031572963
Category :
Languages : en
Pages : 158
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Book Description
Author: Kenneth E Kolodziej
Publisher: Artech House
ISBN: 1630817902
Category : Technology & Engineering
Languages : en
Pages : 440
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Book Description
Many wireless systems could benefit from the ability to transmit and receive on the same frequency at the same time, which is known as In-Band Full-Duplex (IBFD). This technology could lead to enhanced spectral efficiency for future wireless networks, such as fifth-generation New Radio (5G NR) and beyond, and could enable capabilities and applications that were previously considered impossible, such as IBFD with phased array systems. In this exciting new book, experts from industry, academic, and federal research institutions discuss the various approaches that can be taken to suppress the inherent self-interference that is generated in IBFD systems. Both static and adaptive techniques that span across the propagation, analog and digital domains are presented. Details and measured results that encompass high-isolation antenna designs, RF, and photonic cancellation as well as signal processing approaches, which include beamforming and linear/non-linear equalization are detailed. Throughout this book, state-of-the-art IBFD systems that utilize these technologies will be provided as practical examples for various applications. Expert IBFD perspectives from multiple research organizations and companies, which would provide readers with the most accurate state-of-the-art approaches. This is the first book that dives into both the techniques that make IBFD systems possible as well as several different applications that use IBFD technology.
Author: David Tse
Publisher: Cambridge University Press
ISBN: 9780521845274
Category : Computers
Languages : en
Pages : 598
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Book Description
This textbook takes a unified view of the fundamentals of wireless communication and explains cutting-edge concepts in a simple and intuitive way. An abundant supply of exercises make it ideal for graduate courses in electrical and computer engineering and it will also be of great interest to practising engineers.
Author: Thang X. Vu
Publisher: Cambridge University Press
ISBN: 1108480837
Category : Computers
Languages : en
Pages : 431
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Book Description
Discover the latest research results for both uncoded and coded caching techniques in future wireless network design.
Author: Fernando Gregorio
Publisher: Springer Nature
ISBN: 3030324370
Category : Technology & Engineering
Languages : en
Pages : 269
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Book Description
This book presents a synthesis of the research carried out in the Laboratory of Signal Processing and Communications (LaPSyC), CONICET, Universidad Nacional del Sur, Argentina, since 2003. It presents models and techniques widely used by the signal processing community, focusing on low-complexity methodologies that are scalable to different applications. It also highlights measures of the performance and impact of each compensation technique. The book is divided into three parts: 1) basic models 2) compensation techniques and 3) applications in advanced technologies. The first part addresses basic architectures of transceivers, their component blocks and modulation techniques. It also describes the performance to be taken into account, regardless of the distortions that need to be compensated. In the second part, several schemes of compensation and/or reduction of imperfections are explored, including linearization of power amplifiers, compensation of the characteristics of analog-to- digital converters and CFO compensation for OFDM modulation. The third and last part demonstrates the use of some of these techniques in modern wireless-communication systems, such as full-duplex transmission, massive MIMO schemes and Internet of Things applications.
Author: Dominique Noguet
Publisher: Springer
ISBN: 3319403524
Category : Computers
Languages : en
Pages : 776
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Book Description
This book constitutes the thoroughly refereed conference proceedings of the 11th International Conference on Cognitive Radio Oriented Wireless Networks, CROWNCOM 2016, held in Grenoble, France, May 30 – April 1, 2016. The 62 revised full papers presented were carefully reviewed and selected from numerous submissions and cover the evolution of cognitive radio technology pertaining to 5G networks. The papers are clustered to topics on dynamic spectrum access/management, networking protocols for CR, modeling and theory, HW architecture and implementations, next generation of cognitive networks, standards and business models, emerging applications for cognitive networks.
