Download or read book Base Station Cooperation Strategies for Multi user Detection in Interference Limited Cellular Systems written by Shahid Khattak and published by Jörg Vogt Verlag. This book was released on 2008 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Communications Signal Processing and Systems written by Qilian Liang and published by Springer. This book was released on 2019-05-04 with total page 1137 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together papers from the 2018 International Conference on Communications, Signal Processing, and Systems, which was held in Dalian, China on July 14–16, 2018. Presenting the latest developments and discussing the interactions and links between these multidisciplinary fields, the book spans topics ranging from communications, signal processing and systems. It is aimed at undergraduate and graduate electrical engineering, computer science and mathematics students, researchers and engineers from academia and industry as well as government employees.
Download or read book Cooperative Base Station Processing in Multidimensional Interference written by Sara Bavarian and published by . This book was released on 2009 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cooperative base station (CBS) processing takes advantage of the entire infrastructure fabric in system-wide multiuser detection (MUD) of each and all mobile stations (MSs). It is a promising paradigm for increasing the efficiency of future wireless communications systems, benefiting from increased dimensionality through macrodiversity as well as increasing the capacity largely through the achievement of full frequency reuse. Managing the high levels of interference occurred in this scheme is the main dilemma discouraging the practical implementation. In this thesis, we introduce innovative methods to handle and reduce co-channel interference in the uplink of CBS systems. Based on the groupwise iterative multiuser detection (IMUD), we come up with a new way to reduce the complexity of belief propagation (BP) algorithm. The resulting reduced complexity BP (RCBP) algorithm is a flexible, efficient technique that can be used for joint detection in a variety of high interference situations. We apply RCBP for distributed MUD in CBS uplink and show that its performance is close to that of the BP algorithm at lower computational cost in the simplified channel model and it has excellent performance in joint decoding and detection using the low-density parity-check (LDPC) codes. We also examine CBS processing in a realistic wireless network model, and illustrate how system-wide RCBP MUD can successfully detect the co-channel signals originating from the MSs in the neighbouring cells, included in the detection set. However, the system performance in such system is limited by the unmodeled interference from the MSs outside the detection set. We apply the RCBP algorithm for MUD in frequency selective multiple-input, multiple-output (MIMO) channels. Our study proves that the RCBP is an efficient equalizer dealing with inter-symbol interference in high interference situations and in iterative joint detection and decoding. In order to reduce the unmodeled interference in CBS networks, we propose a novel power control policy for CBS uplink allowing the MSs to control according to the total received power in their detection set. We investigate the performance of this method and show that it reduces the intercell interference, saves power and improves the BER performance.
Download or read book Coordinated Multi Point in Mobile Communications written by Patrick Marsch and published by Cambridge University Press. This book was released on 2011-07-21 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: A self-contained guide to coordinated multi-point (CoMP), this comprehensive book covers everything from theoretical basics to practical implementation. Addressing a wide range of topics, it highlights the potential gains of CoMP, the fundamental degrees of freedom involved and the key challenges of using CoMP in practice. The editors and contributors bring unique real-world experience from running the world's first and largest test beds for LTE-Advanced, and recent field trial results from these tests are presented. With detailed insight into the realistic potential of CoMP as a key technology for LTE-Advanced and beyond, this is a must-read resource for professionals and students who want the big picture on CoMP or require in-depth knowledge of how to build cellular communication systems for the future.
Download or read book Mobile and Wireless Communications for IMT Advanced and Beyond written by Afif Osseiran and published by John Wiley & Sons. This book was released on 2011-08-22 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: A timely addition to the understanding of IMT-Advanced, this book places particular emphasis on the new areas which IMT-Advanced technologies rely on compared with their predecessors. These latest areas include Radio Resource Management, Carrier Aggregation, improved MIMO support and Relaying. Each technique is thoroughly described and illustrated before being surveyed in context of the LTE-Advanced standards. The book also presents state-of-the-art information on the different aspects of the work of standardization bodies (such as 3GPP and IEEE), making global links between them. Explores the latest research innovations to assess the future of the LTE standard Covers the latest research techniques for beyond IMT-Advanced such as Coordinated multi-point systems (CoMP), Network Coding, Device-to-Device and Spectrum Sharing Contains key information for researchers from academia and industry, engineers, regulators and decision makers working on LTE-Advanced and beyond
Download or read book Advances in Multiuser Detection written by Michael L. Honig and published by John Wiley & Sons. This book was released on 2009-08-31 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Limited Feedback for Multicell Cooperative Systems written by Ramya Bhagavatula and published by . This book was released on 2010 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cellular systems are interference limited in nature. This problem is further accentuated in upcoming commercial wireless standards, which intend to use all the available spectrum in every cell in the network to improve peak data rates. This, however, could lead to considerable interference among neighboring cells, decreasing data rates and causing outages at the cell-edge. Multicell cooperation offers a solution for reducing the high levels of interference. The basic idea is that base stations coordinate transmissions by sharing user information among themselves via backhaul links. With the backhaul being bandwidth limited, cooperative strategies that involve the exchange of only user channel state information (CSI) among base stations offer the best tradeoff between complexity, backhaul load and performance gains. This dissertation focuses on these partial cooperative techniques, known as coordinated beamforming in 3GPP LTE Advanced. In existing frequency division duplex systems, users estimate and feedback the CSI of a single channel over a finite-bandwidth feedback link, using limited feedback techniques. In a multicell cooperative scenario, each user needs to transmit the CSI of multiple channels using the same feedback link. This implies that the available feedback bandwidth must be efficiently shared among different channels to maximize performance gains in the cellular network. This dissertation develops three different approaches to limited feedback in multicell cooperative systems. The first technique, separate quantization, involves each channel being fed back individually using a different codebook. Closed-form expressions are derived to partition adaptively the available feedback bits, as a function of the signal strengths and delays associated with each of the multiple channels. The second strategy is known as joint quantization, where the CSI of all the channels are quantized together as a composite vector. It is shown that though this approach yields higher data rates with smaller feedback requirements than separate quantization, it requires the design and storage of special codebooks. Finally, predictive joint quantization is proposed to exploit the temporal correlation of the wireless channel to reduce feedback requirements significantly as compared to the other two strategies, at the cost of high complexity at the user terminals.
Download or read book Small Cell Networks written by Tony Q. S. Quek and published by Cambridge University Press. This book was released on 2013-05-02 with total page 441 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive resource explores state-of-the-art advances in the successful deployment and operation of small cell networks. A broad range of technical challenges, and possible solutions, are addressed, including practical deployment considerations and interference management techniques, all set within the context of the most recent cutting-edge advances. Key aspects covered include 3GPP standardisation, applications of stochastic geometry, PHY techniques, MIMO techniques, handover and radio resource management, including techniques designed to make the best possible use of the available spectrum. Detailed technical information is provided throughout, with a consistent emphasis on real-world applications. Bringing together world-renowned experts from industry and academia, this is an indispensable volume for researchers, engineers and systems designers in the wireless communication industry.
Download or read book Cooperative Wireless Communications written by Yan Zhang and published by CRC Press. This book was released on 2009-03-10 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cooperative devices and mechanisms are increasingly important to enhance the performance of wireless communications and networks, with their ability to decrease power consumption and packet loss rate and increase system capacity, computation, and network resilience. Considering the wide range of applications, strategies, and benefits associated wit
Download or read book Fundamentals of Wireless Communication written by David Tse and published by Cambridge University Press. This book was released on 2005-05-26 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Green Networking and Communications written by Shafiullah Khan and published by CRC Press. This book was released on 2013-10-29 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the information and communication technology (ICT) industry accounted for only 2 percent of global greenhouse gas emissions in 2007, the explosive increase in data traffic brought about by a rapidly growing user base of more than a billion wireless subscribers is expected to nearly double that number by 2020. It is clear that now is the ti
Download or read book Le cat chumenat pour la c ne est il vangelique written by and published by . This book was released on 1847 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy and Spectrum Efficient Wireless Network Design written by Guowang Miao and published by Cambridge University Press. This book was released on 2015 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides the fundamental principles and practical tools needed to design next-generation wireless networks that are both energy- and spectrum-efficient.
Download or read book Intercell Interference Coordination Without Base Station Cooperation for Wireless Cellular Networks written by Ralf Matthias Bendlin and published by . This book was released on 2011 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 4G Femtocells written by Haijun Zhang and published by Springer Science & Business Media. This book was released on 2013-10-01 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: This brief examines resource allocation and interference management for 4G femtocells. It introduces 4G femtocells in the context of 4G mobile networks and discusses related technical challenges in resource allocation and interference management. Topics include ant colony algorithm based downlink resource allocation, intelligent scheduling and power control, uplink and downlink for two-tier networks, quality of service (QoS) constraints and the cross-tier interference constraint. The authors present algorithms to alleviate common femtocell-related problems such as subchannel power allocation. The complexity of the proposed resource allocation algorithms is analyzed, and the effectiveness of the proposed algorithms is verified by simulations. This concise and practical book directly addresses common problems relating to femtocells and resource management. It serves as a useful tool for researchers in the field. Advanced-level students or professionals interested in femtocells and networks will also find the content helpful.
Download or read book Cellular Base station Cooperation with Turbo Interference Cancellation written by Timo Mayer and published by . This book was released on 2008 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interference Management in Cooperative Multi cell Networks written by Tuan Anh Le and published by . This book was released on 2012 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: In multi-cell networks where resources are aggressively reused, eliminating interference is the key factor to reduce the system energy consumption. This thesis proposes interference management techniques based on beam-forming with different levels of cooperation amongst base stations (BSs). First, a multi-cell beamforming (MBF) technique is introduced to design beamformers as if geographically distributed BSs were a single BS. The aim is to minimise the total transmit power across the network while main¬taining the required signal-to-interference-plus-noise ratio (SINK) for every user. An iterative algorithm is proposed to solve the optimisation problem of MBF. Since the MBF scheme requires the circulation of all users' data amongst coordinating BSs, a user position aware (UFA) algorithm is de¬veloped for MBF to reduce the backhaul overhead by allocating each user to nearby BSs only. To completely avoid user data circulation, a semi def¬inite programming (SDP) algorithm, named as coordinated beamforming (CBF), is introduced to jointly calculate beamformers for all coordinating BSs in a manner that each BS transmits to its local users only. Taking into account errors in channel estimations, robust beamforming designs are developed for CBF. Next, fast wireless backhaul protocols, i.e., Star and Ring, are proposed using network coding to enable links amongst coor¬dinating BSs. The maximum achievable throughput of each protocol is analysed. The power consumption of the Ring protocol is characterised and used to compare and evaluate the performance of the proposed beam-forming schemes. The deployments of MBF, UPA-MBF and CBF schemes require a central unit for a group of coordinating BSs as well as backhaul links amongst them. In fact, a central unit may not always be available, e.g., in femtocell and self-organising networks, while backhaul links may be limited.
