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Author: Minh Hong Ha
Publisher:
ISBN: 9781321852592
Category :
Languages : en
Pages : 121
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Book Description
Power control has become an important aspect of any communication system such as cellular networks, wireless LANs and DSL modems. Power control offers many benefits: optimizing the SNR in the link, conserving the battery life and minimizing the interference between the transmitter terminals. Power control is recognized as adaptive control. Here, we consider solely the optimization of the battery life and assessing the total energy cost in power control. The power control problem is formulated in a communication link with a static complex gain and a single transmitter, corrupted by complex normal noise. The channel estimate is computed by least squares using pilot tones. Then the signal power and noise power estimates are calculated, and ultimately the SNR estimate and its statistical properties. Based on this SNR estimate, an appropriate power level can be chosen for data transmission. The total energy cost of the power control process is formulated with aid of the statistics of SNR estimate. The cost is found to exhibit a pathological behavior, where a transmitter should send an infinite number of pilot tones at zero transmitted power to minimize the non-zero total energy cost of power control. When the transmitter is moving, however, this pathological behavior disappears. Next we look at the power control problem from the perspective of ODAC. The dual feature of the problem is that to probe the link effectively, the transmitter must use a large power level, but this affects the control process negatively as it increases the overall energy cost. A balance between the two aspects must be obtained. Assuming some a priori information about the fade is known, we use SDP, with aid of the information state that describes the evolution of the fade's statistics as measurements are obtained and controls applied, thus acquiring ODAC solutions to the power control problem. The solutions are found to depend greatly on what we know beforehand about the channel, a feature that is not present in current power control algorithms. We also develop heuristics that help reduce the computational demand due to SDP algorithm.
Author: Minh Hong Ha
Publisher:
ISBN: 9781321852592
Category :
Languages : en
Pages : 121
Get Book Here
Book Description
Power control has become an important aspect of any communication system such as cellular networks, wireless LANs and DSL modems. Power control offers many benefits: optimizing the SNR in the link, conserving the battery life and minimizing the interference between the transmitter terminals. Power control is recognized as adaptive control. Here, we consider solely the optimization of the battery life and assessing the total energy cost in power control. The power control problem is formulated in a communication link with a static complex gain and a single transmitter, corrupted by complex normal noise. The channel estimate is computed by least squares using pilot tones. Then the signal power and noise power estimates are calculated, and ultimately the SNR estimate and its statistical properties. Based on this SNR estimate, an appropriate power level can be chosen for data transmission. The total energy cost of the power control process is formulated with aid of the statistics of SNR estimate. The cost is found to exhibit a pathological behavior, where a transmitter should send an infinite number of pilot tones at zero transmitted power to minimize the non-zero total energy cost of power control. When the transmitter is moving, however, this pathological behavior disappears. Next we look at the power control problem from the perspective of ODAC. The dual feature of the problem is that to probe the link effectively, the transmitter must use a large power level, but this affects the control process negatively as it increases the overall energy cost. A balance between the two aspects must be obtained. Assuming some a priori information about the fade is known, we use SDP, with aid of the information state that describes the evolution of the fade's statistics as measurements are obtained and controls applied, thus acquiring ODAC solutions to the power control problem. The solutions are found to depend greatly on what we know beforehand about the channel, a feature that is not present in current power control algorithms. We also develop heuristics that help reduce the computational demand due to SDP algorithm.
Author: Lay Teen Ong
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Shlomi Arnon
Publisher: Cambridge University Press
ISBN: 0521197872
Category : Technology & Engineering
Languages : en
Pages : 405
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Book Description
Combines theory with real-world case studies to give a comprehensive overview of modern optical wireless technology.
Author: Azzedine Boukerche
Publisher: CRC Press
ISBN: 1420035096
Category : Computers
Languages : en
Pages : 1042
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Book Description
The Handbook of Algorithms for Wireless Networking and Mobile Computing focuses on several aspects of mobile computing, particularly algorithmic methods and distributed computing with mobile communications capability. It provides the topics that are crucial for building the foundation for the design and construction of future generations of mobile and wireless networks, including cellular, wireless ad hoc, sensor, and ubiquitous networks. Following an analysis of fundamental algorithms and protocols, the book offers a basic overview of wireless technologies and networks. Other topics include issues related to mobility, aspects of QoS provisioning in wireless networks, future applications, and much more.
Author: Alagan Anpalagan
Publisher: Academic Press
ISBN: 012415882X
Category : Technology & Engineering
Languages : en
Pages : 815
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Book Description
This book gives a comprehensive guide on the fundamental concepts, applications, algorithms, protocols, new trends and challenges, and research results in the area of Green Information and Communications Systems. It is an invaluable resource giving knowledge on the core and specialized issues in the field, making it highly suitable for both the new and experienced researcher in this area. Key Features: Core research topics of green information and communication systems are covered from a network design perspective, giving both theoretical and practical perspectives Provides a unified covering of otherwise disperse selected topics on green computing, information, communication and networking Includes a set of downloadable PowerPoint slides and glossary of terms for each chapter A ‘whose-who’ of international contributors Extensive bibliography for enhancing further knowledge Coverage includes: Smart grid technologies and communications Spectrum management Cognitive and autonomous radio systems Computing and communication architectures Data centres Distributed networking Cloud computing Next generation wireless communication systems 4G access networking Optical core networks Cooperation transmission Security and privacy Core research topics of green information and communication systems are covered from a network design perspective, giving both a theoretical and practical perspective A ‘whose-who’ of international contributors Extensive bibliography for enhancing further knowledge
Author: Debashis Dutta
Publisher: Springer Nature
ISBN: 9813297751
Category : Technology & Engineering
Languages : en
Pages : 1004
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Book Description
This book comprises select proceedings of the International Conference on VLSI, Communication and Signal processing (VCAS 2018). It looks at latest research findings in VLSI design and applications. The book covers a wide range of topics in electronics and communication engineering, especially in the area of microelectronics and VLSI design, communication systems and networks, and image and signal processing. The contents of this book will be useful to researchers and professionals alike.
Author: Heikki Niilo Koivo
Publisher: John Wiley & Sons
ISBN: 9780470021798
Category : Technology & Engineering
Languages : en
Pages : 356
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Book Description
This book provides the reader with a complete coverage of radio resource management for 3G wireless communications Systems Engineering in Wireless Communications focuses on the area of radio resource management in third generation wireless communication systems from a systems engineering perspective. The authors provide an introduction into cellular radio systems as well as a review of radio resource management issues. Additionally, a detailed discussion of power control, handover, admission control, smart antennas, joint optimization of different radio resources , and cognitive radio networksis offered. This book differs from books currently available, with its emphasis on the dynamical issues arising from mobile nodes in the network. Well-known control techniques, such as least squares estimation, PID control, Kalman filers, adaptive control, and fuzzy logic are used throughout the book. Key Features: Covers radio resource management of third generation wireless communication systems at a systems level First book to address wireless communications issues using systems engineering methods Offers the latest research activity in the field of wireless communications, extending to the control engineering community Includes an accompanying website containing MATLABTM/SIMULINKTM exercises Provides illustrations of wireless networks This book will be a valuable reference for graduate and postgraduate students studying wireless communications and control engineering courses, and R&D engineers.
Author: Yan Zhang
Publisher: CRC Press
ISBN: 1439808910
Category : Computers
Languages : en
Pages : 574
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Book Description
This comprehensive technical guide explains game theory basics, architectures, protocols, security, models, open research issues, and cutting-edge advances and applications. Describing how to employ game theory in infrastructure-based wireless networks and multihop networks to reduce power consumption, it facilitates quick and easy reference to related optimization and algorithm methodologies. The book explains how to apply the game theoretic model to address resource allocation, congestion control, attacks, routing, energy management, packet forwarding, and MAC.
Author: Francisco Rodrigo Porto Cavalcanti
Publisher: Springer Science & Business Media
ISBN: 1441901558
Category : Technology & Engineering
Languages : en
Pages : 542
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Book Description
In June 2000, GTEL (Wireless Telecommunications Research Group) at the F- eral University of Ceara ́ was founded by Professor Rodrigo Cavalcanti and his c- leagues with the mission of developing wireless communications technology and impact the development of the Brazilian telecommunications sector. From the start, this research effort has been supported by Ericsson Research providing a dynamic environment where academia and industry together can address timely and relevant research challenges. This book summarized much of the research output that has resulted from GTEL’s efforts. It provides a comprehensive treatment of the physical and multiple access layers in mobile communication systems describing different generations of systems but with a focus on 3G systems. The team of Professor C- alcanti has contributed scienti cally to the development of this eld and built up an impressive expertise. In the chapters that follow, they share their views and kno- edge on the underlying principles and technical trade-offs when designing the air interface of 3G systems. The complexity of 3G systems and the interaction between the physical and m- tiple access layers present a tremendous challenge when modeling, designing, and analyzing the mobile communication system. Herein, the authors tackle this pr- lem in an impressive manner. Their work is very much in line with the developments in 3GPP providing a deeper understanding of the evolution of 3G and also future enhancements.
Author: Rashvand, Habib F.
Publisher: IGI Global
ISBN: 1466609613
Category : Computers
Languages : en
Pages : 656
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Book Description
Although the existing layering infrastructure--used globally for designing computers, data networks, and intelligent distributed systems and which connects various local and global communication services--is conceptually correct and pedagogically elegant, it is now well over 30 years old has started create a serious bottleneck. Using Cross-Layer Techniques for Communication Systems: Techniques and Applications explores how cross-layer methods provide ways to escape from the current communications model and overcome the challenges imposed by restrictive boundaries between layers. Written exclusively by well-established researchers, experts, and professional engineers, the book will present basic concepts, address different approaches for solving the cross-layer problem, investigate recent developments in cross-layer problems and solutions, and present the latest applications of the cross-layer in a variety of systems and networks.
