Multiuser Wireless Networks
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Wireless Networks Multiuser Detection In Cross Layer Design
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Author : Christina Comaniciu
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-06-14
Wireless Networks Multiuser Detection In Cross Layer Design written by Christina Comaniciu and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-06-14 with Technology & Engineering categories.
Cross-layer design seeks to enhance the capacity of wireless networks significantly through the joint optimization of multiple layers in the network, primarily the physical (PHY) and medium access control (MAC) layers. Although there are advantages of such design in wireline networks as well, this approach is particularly advantageous for wireless networks due to the properties (such as mobility and interference) that strongly affect performance and design of higher layer protocols. This unique monograph is concerned with the issue of cross-layer design in wireless networks, and more particularly with the impact of node-level multiuser detection on such design. It provides an introduction to this vibrant and active research area insufficiently covered in existing literature, presenting some of the principal methods developed and results obtained to date. Accompanied by numerous illustrations, the text is an excellent reference for engineers, researchers and students working in communication networks.
Multiuser Wireless Networks
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Author : Lifeng Lai
language : en
Publisher:
Release Date : 2007
Multiuser Wireless Networks written by Lifeng Lai and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Computer networks categories.
Abstract: The presence of multiple users in the wireless network offers users with an opportunity to cooperate. Adopting tools from network information theory, this thesis investigates the utilities of user cooperation under various scenarios and examines the validity of cooperation assumption in energy limited networks. We first consider the construction of cooperation strategies for a wireless network composed of three nodes and limited by half-duplex and total power constraints. We show that noisy feedback plays a crucial role in devising efficient cooperation schemes for various channels. For the relay channel, we propose a new cooperation scheme that exploits the wireless feedback gain. Our analysis of the achievable rate of this scheme reveals the diminishing feedback gain at both the low and high signal-to-noise ratio regimes. Inspired by the proposed feedback strategy, we identify a greedy cooperation framework applicable to both the multicast and three-way channels. Our performance analysis reveals the asymptotic optimality of the proposed greedy approach in the wireless network setting. We then establish the utility of user cooperation in facilitating secure wireless communications. In particular, the four-terminal relay-eavesdropper channel is introduced and an outer-bound on the optimal rate-equivocation region is derived. Several cooperation strategies are then devised and the corresponding achievable rate-equivocation regions are characterized. The gain offered by the proposed cooperation strategies is then proved theoretically and validated numerically in the Additive White Gaussian Noise channel. We also examine user cooperation from game theoretic perspective. Using game theoretic framework, the critical role of altruistic nodes in encouraging cooperation is established, both for small and large scale networks. In a small network, where nodes utilize decode-and-forward scheme to cooperate, we show that a relay node, with appropriate strategy and location, successfully turns the Nash Equilibrium from no-cooperation to full-cooperation. In the large scale network, we show that it is sufficient to have a vanishingly small fraction of the nodes to be altruistic, i.e., relay nodes, in order to ensure full cooperation from all the nodes in the network.
Wireless Networks Multiuser Detection In Cross Layer Design
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Author : Christina Comaniciu
language : en
Publisher: Springer
Release Date : 2008-11-01
Wireless Networks Multiuser Detection In Cross Layer Design written by Christina Comaniciu and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-11-01 with Technology & Engineering categories.
Cross-layer design seeks to enhance the capacity of wireless networks significantly through the joint optimization of multiple layers in the network, primarily the physical (PHY) and medium access control (MAC) layers. Although there are advantages of such design in wireline networks as well, this approach is particularly advantageous for wireless networks due to the properties (such as mobility and interference) that strongly affect performance and design of higher layer protocols. This unique monograph is concerned with the issue of cross-layer design in wireless networks, and more particularly with the impact of node-level multiuser detection on such design. It provides an introduction to this vibrant and active research area insufficiently covered in existing literature, presenting some of the principal methods developed and results obtained to date. Accompanied by numerous illustrations, the text is an excellent reference for engineers, researchers and students working in communication networks.
Wireless Networks Multiuser Detection In Cross Layer Design
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Author : Comaniciu Critstina
language : en
Publisher:
Release Date : 2007-04-01
Wireless Networks Multiuser Detection In Cross Layer Design written by Comaniciu Critstina and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-04-01 with categories.
Advances In Multiuser Detection
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Author : Michael L. Honig
language : en
Publisher: John Wiley & Sons
Release Date : 2009-08-19
Advances In Multiuser Detection written by Michael L. Honig and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-08-19 with Technology & Engineering categories.
A Timely Exploration of Multiuser Detection in Wireless Networks During the past decade, the design and development of current and emerging wireless systems have motivated many important advances in multiuser detection. This book fills an important need by providing a comprehensive overview of crucial recent developments that have occurred in this active research area. Each chapter is contributed by noted experts and is meant to serve as a self-contained treatment of the topic. Coverage includes: Linear and decision feedback methods Iterative multiuser detection and decoding Multiuser detection in the presence of channel impairments Performance analysis with random signatures and channels Joint detection methods for MIMO channels Interference avoidance methods at the transmitter Transmitter precoding methods for the MIMO downlink This book is an ideal entry point for exploring ongoing research in multiuser detection and for learning about the field's existing unsolved problems and issues. It is a valuable resource for researchers, engineers, and graduate students who are involved in the area of digital communications.
On The Efficient Utilization Of Multiple Antennas For Multiuser Wireless Networks
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Author : Bongyong Song
language : en
Publisher:
Release Date : 2006
On The Efficient Utilization Of Multiple Antennas For Multiuser Wireless Networks written by Bongyong Song and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
Coherent Cooperative Relaying In Low Mobility Wireless Multiuser Networks
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Author : Stefan Berger
language : en
Publisher: Logos Verlag Berlin GmbH
Release Date : 2010
Coherent Cooperative Relaying In Low Mobility Wireless Multiuser Networks written by Stefan Berger and has been published by Logos Verlag Berlin GmbH this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
In this thesis, several important aspects of cooperative wireless multiuser networks are investigated. The focus lies on coherent two-hop relaying networks where several amplify-and-forward (AF) relays assist the communication between multiple source-destination pairs. First, the impact of local oscillator (LO) imperfections and I/Q imbalance at the relays on two-hop relaying is investigated. A special focus lies on the comparison between frequency division duplexing (FDD) and time division duplexing (TDD) relays. Based on the observation that the direction in which a channel between two wireless nodes is measured has an impact on the estimate, phase synchronization requirements for coherent relaying networks are then found. Several channel estimation protocols that differ in the direction in which the single-hop channels are measured are furthermore identi'ed and their performance is compared. Next, a very simple phase synchronization scheme is presented that provides a set of relays with a common LO phase. Two coherent beamforming schemes, namely multiuser zero-forcing (MUZF) and multiuser minimum mean squared error (MMSE) relaying, are then investigated. Finally, a real-world demonstrator for distributed wireless communication networks (called RACooN Lab) is presented. It was used to implement coherent cooperative communication schemes on a practical two-hop relaying network.
Multiuser Wireless Networks Cooperation And Physical Layer Security
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Author : Kyatsandra G. Nagananda
language : en
Publisher:
Release Date : 2013
Multiuser Wireless Networks Cooperation And Physical Layer Security written by Kyatsandra G. Nagananda and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Lastly, we derive inner and outer bounds on the capacity region of the cognitive Z-channel, comprising two sender-receiver pairs with no cross-talk channel gain between one of the sender-receiver pairs. The non-cognitive sender has two messages, each message transmitted to the intended destination. The cognitive transmitter has one message intended to its pairing receiver; in addition, it has noncausal knowledge of the messages and the corresponding codewords of the non-cognitive sender.
Resource Allocation In Multiuser Multicarrier Wireless Systems
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Author : Ian C. Wong
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-11-15
Resource Allocation In Multiuser Multicarrier Wireless Systems written by Ian C. Wong and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-11-15 with Technology & Engineering categories.
This book proposes a unified algorithmic framework based on dual optimization techniques that have complexities that are linear in the number of subcarriers and users, and that achieve negligible optimality gaps in standards-based numerical simulations. Adaptive algorithms based on stochastic approximation techniques are also proposed, which are shown to achieve similar performance with even much lower complexity. All the algorithms proposed are clearly presented in concise block diagrams allowing the reader to implement these algorithms in the software of their choice. This book is an accessible reference for researchers and industry practitioners alike.
Multiuser Cooperative Diversity For Wireless Networks
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Author :
language : en
Publisher:
Release Date : 2006
Multiuser Cooperative Diversity For Wireless Networks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.