Download or read book Towards Power efficient and Intelligent Wireless Communication Systems written by Yunseong Cho and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the growing demand for higher date rates and more reliable service capabilities, wireless communication systems continue to grow in popularity and importance. In order to enable higher data rate via broader bandwidth, millimeter wave (mmWave) systems are deployed for modern and future communication systems. Due to the high transmission loss of the mmWave frequency bands, a massive number of antennas are employed to focus transmitted power in narrow radio frequency (RF) beams. However, associating one RF chain with two high-resolution data converters for each antenna element would consume a prohibitively large amount of power. Furthermore, challenging service requirements can be handled by machine learning techniques in a variety of application spaces. The goal of this dissertation is to propose communication systems that are not only reliable and high-performing, but also power-efficient as well as intelligent. Two possible ways to alleviate the huge power consumption problem are 1) low-resolution data converters, and 2) hybrid analog-digital beamforming architectures since the former tries to reduce the power consumption of each individual RF chain and the latter directly scales down the number of RF chains. Additionally, intelligent communication systems that can adapt to changing network conditions and user requirements are crucial for ensuring reliable and efficient communication. In either case, these solutions introduce severe non-convexity and non-linearity to the entire system. In this regard, I propose new solutions that can respond to future communication systems requiring a fundamental re-design of current communication systems based on a power-efficient and intelligent framework. First, I investigate a coordinated multipoint (CoMP) beamforming and power control problem for base stations (BSs) with a massive number of antenna arrays under coarse quantization by low-resolution analog-to-digital converters (ADCs) and digital-to-analog converters (DACs). I first formulate total power minimization problems of both uplink (UL) and downlink (DL) systems subject to signal-to-quantization-plue-interference-and-noise ratio (SQINR) constraints. I then show strong duality for the UL and DL problems under the coarse quantization condition when channel reciprocity holds with time-division duplexing (TDD) assumption. Leveraging the duality, I propose a framework that is directed toward a twofold aim: to discover the optimal transmit powers in UL by developing iterative algorithm in a distributed manner and to obtain the optimal precoder in DL as a scaled instance of UL combiner. Under homogeneous transmit power and SQINR constraints per cell, I further derive a deterministic solution for the UL CoMP problem by analyzing the lower bound of the SQINR. Lastly, I extend the derived result to wideband orthogonal frequency-division multiplexing (OFDM) systems to optimize transmit power and beamformer for all subcarriers. Simulation results validate the theoretical results and proposed algorithms in terms of total transmit power, duality gap, and convergence. Second, I aim to find the DL beamformer that minimizes the maximum power on transmit antenna array of each BS under received SQINR constraints while minimizing per-antenna transmit power for a more realistic deployment. I first formulate formulating the quantized DL OFDM antenna power minimax problem and deriving its associated dual problem. With proving strong duality, I use the associated UL dual solution to compute the DL beamformer. Subsequently, the DL beamformer is used in updating the covariance matrix of the uplink noise signals. The series of processes builds an efficient algorithm to find a numerical solution. Simulations validate the proposed algorithm in terms of the maximum antenna transmit power and peak-to-average-power ratio. Third, I propose a learning-based maximum likelihood detection framework with an acceptable learning length for uplink massive multiple-input-multiple-output (MIMO) systems with one-bit ADCs. The learning-based detection only requires counting the occurrences of the quantized outputs at each antenna. The learning in the high signal-to-noise ratio (SNR) regime, however, needs excessive training to estimate the extremely small likelihood probabilities. To address this drawback, I utilize a dithering signal to artificially decrease the SNR and then remove the impact of the dithering noise via post processing. I evolve the technique by developing an adaptive dither-and-learning method that updates the dithering power according the patterns observed in the quantized dithered signals. Lastly, the computed likelihood probabilities are utilized in deriving log-likelihood ratio to enable state-of-the-art channel coding schemes. I compare the uncoded and coded detection performance of the proposed algorithm with other learning-based frameworks and show that the proposed algorithm shows the performance closest to optimal performance. Fourth, I propose a deep reinforcement learning (DRL)-based solution for joint hybrid beamforming (HB) and power control problems when multiple massive MIMO BSs are communicating with multiple users in the uplink mmWave band. The HB method requires both digital and analog beamformers, with the latter using discrete phase shifters to project high-dimensional antenna ports to low-dimensional logical ports and scale down the number of RF chains. However, this results in non-convexity, making the problem difficult to solve using existing algorithms. In multicell uplink communication systems, I aim to jointly design the HB at each BS and transmit power control of the associated users while ensuring that the received signal-to-interference-and-noise ratio (SINR) constraints are satisfied. Considering the use of the DRL-based approach and the primal problem, I formulate the RL basics. To handle the combination of discrete and continuous inputs, I use the DDPG RL algorithm, which outputs a valid action that maps to the design factors. In particular, I aim to control each phase shifter individually by introducing an intermediate vector and applying a differentiable argmax function to estimate the phase angle index. The proposed method is evaluated through simulation results based on the achieved SINR. The four contributions could make a worthwhile enhancement to the development of power-efficient and intelligent wireless communication systems by meeting the communication needs of modern society while minimizing energy consumption and maximizing the use of available resources

Download or read book Energy Efficiency in Wireless Networks written by Oswald Jumira and published by John Wiley & Sons. This book was released on 2013-01-24 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The last decade has witnessed an unprecedented development and growth in global wireless communications systems, technologies and network “traffic” generated over network infrastructures. This book presents state-of-the-art energy-efficient techniques, designs and implementations that pertain to wireless communication networks such as cellular networks, wireless local area networks (WLANs) and wireless ad hoc networks (WAHNs) including mobile ad hoc networks (MANETs), and wireless sensor networks (WSNs) as they are deployed across the world to facilitate “always on” reliable high-speed wireless access from anywhere, at anytime to accommodate the new paradigm of the “Internet of Things” (IoT). The pervasive and exponential growth of Wi-Fi and the impact of bandwidth-intensive applications on the energy consumption of Wi-Fi-enabled devices are discussed along with energy harvesting as an advantageous option to power WAHNs. The book aims to serve as a useful reference for researchers, students, regulatory authorities, and educators.

Download or read book Intelligent Wireless Communications written by George Mastorakis and published by IET. This book was released on 2021-04-21 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aimed at researchers, engineers and scientists involved in the design and development of protocols and AI applications for wireless communication devices and networks, this edited book presents recent research and innovations in emerging AI methods and AI-powered mechanisms, and future perspectives in this field.

Download or read book Reinforcement Learning for Reconfigurable Intelligent Surfaces written by Alice Faisal and published by Springer Nature. This book was released on with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Power Efficiency in Broadband Wireless Communications written by Pooria Varahram and published by CRC Press. This book was released on 2014-08-29 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Power Efficiency in Broadband Wireless Communications focuses on the improvement of power efficiency in wireless communication systems, especially of mobile devices. Reviewing cutting-edge techniques for conserving power and boosting power efficiency, the book examines various technologies and their impact on consumer devices. It considers each technology, first by introducing the main physical layer components in recent wireless communication systems along with their shortcomings, and then proposing solutions for overcoming these shortcomings. The book covers orthogonal frequency division multiplexing (OFDM) signal generation and formulation and examines the advantages and disadvantages of OFDM systems compared to alternative multiplexing. It introduces one of the main drawbacks of OFDM systems, peak-to-average power ratio (PAPR), and discusses several PAPR techniques. It also explains how to overcome the main drawbacks of real-world OFDM system applications. Considers power amplifier linearization for increasing power efficiency and reducing system costs and power dissipation Describes the implementation scenario of the most promising linearization technique, digital predistortion Presents some experimental demonstrations of digital predistortion when the device under test is in the loop Because the most costly device in a communication system that has a direct impact on power efficiency and power consumption is the power amplifier, the book details the behavior and characteristics of different classes of power amplifiers. Describing the evolution of the mobile cellular communication system, it details a cost-effective technique to help you increase power efficiency, reduce system costs, and prolong battery life in next generation mobile devices.

Download or read book Energy Efficient Cooperative Wireless Communication and Networks written by Zhengguo Sheng and published by CRC Press. This book was released on 2014-11-11 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compared with conventional communications, cooperative communication allows multiple users in a wireless network to coordinate their packet transmissions and share each other's resources, thus achieving high-performance gain and better service coverage and reliability. Energy Efficient Cooperative Wireless Communication and Networks provides a comprehensive look at energy efficiency and system design of cooperative wireless communication. Introducing effective cooperative wireless communication schemes, the book supplies the understanding and methods required to improve energy efficiency, reliability, and end-to-end protocol designs for wireless communication systems. It explains the practical benefits and limitations of cooperative transmissions along with the associated designs of upper-layer protocols, including MAC, routing, and transport protocol. The book considers power efficiency as a main objective in cooperative communication to ensure quality-of-service (QoS) requirements. It explains how to bring the performance gain at the physical layer up to the network layer and how to allocate network resources dynamically through MAC/scheduling and routing to trade off the performance benefits of given transmissions against network costs. Because the techniques detailed in each chapter can help readers achieve energy efficiency and reliability in wireless networks, they have the potential to impact a range of industry areas, including wireless communication, wireless sensor networks, and ad hoc networks. The book includes numerous examples, best practices, and models that capture key issues in real-world applications. Along with algorithms and tips for effective design, the book supplies the understanding you will need to achieve high-performing and energy efficient wireless networks with improved service coverage and reliability.

Download or read book Wireless Information and Power Transfer A New Paradigm for Green Communications written by Dushantha Nalin K. Jayakody and published by Springer. This book was released on 2017-07-20 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents breakthroughs in the design of Wireless Energy Harvesting (WEH) networks. It bridges the gap between WEH through radio waves communications and power transfer, which have largely been designed separately. The authors present an overview of the RF-EHNs including system architecture and RF energy harvesting techniques and existing applications. They also cover the idea of WEH in novel discoveries of information, the theoretical bounds in WEH, wireless sensor networks, usage of modern channel coding together with WEH, energy efficient resource allocation mechanisms, distributed self-organized energy efficient designs, delay-energy trade-off, specific protocols for energy efficient communication designs, D2D communication and energy efficiency, cooperative wireless networks, and cognitive networks.

Download or read book Wireless Information and Power Transfer written by Derrick Wing Kwan Ng and published by John Wiley & Sons. This book was released on 2019-01-29 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: em style="mso-bidi-font-style: normal;"Wireless Information and Power Transfer offers an authoritative and comprehensive guide to the theory, models, techniques, implementation and application of wireless information and power transfer (WIPT) in energy-constrained wireless communication networks. With contributions from an international panel of experts, this important resource covers the various aspects of WIPT systems such as, system modeling, physical layer techniques, resource allocation and performance analysis. The contributors also explore targeted research problems typically encountered when designing WIPT systems.

Download or read book Green Communications and Networking written by F. Richard Yu and published by CRC Press. This book was released on 2016-04-19 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Green Communications and Networking introduces novel solutions that can bring about significant reductions in energy consumption in the information and communication technology (ICT) industry-as well as other industries, including electric power. Containing the contributions of leading experts in the field, it examines the latest research advances

Download or read book Green Communications for Energy Efficient Wireless Systems and Networks written by Himal A. Suraweera and published by IET. This book was released on 2020-11-05 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: The energy crisis, growth in data traffic and increasing network complexity are driving the development of energy-efficient architectures, technologies and networks. This edited book presents research from theory to practice, plus methods and technologies for designing next generation green wireless communication networks.

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 490 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 time to rethink how we design and build our networks. Green Networking and Communications: ICT for Sustainability brings together leading academic and industrial researchers from around the world to discuss emerging developments in energy-efficient networking and communications. It covers the spectrum of research subjects, including methodologies and architectures for energy efficiency, energy-efficient protocols and networks, energy management, smart grid communications, and communication technologies for green solutions. Examines foraging-inspired radio-communication energy management for green multi-radio networks Considers a cross-layer approach to the design of energy-efficient wireless access networks Investigates the interplay between cooperative device-to-device communications and green LTE cellular networks Considers smart grid energy procurement for green LTE cellular networks Details smart grid networking protocols and standards Considering the spectrum of energy-efficient network components and approaches for reducing power consumption, the book is organized into three sections: Energy Efficiency and Management in Wireless Networks, Cellular Networks, and Smart Grids. It addresses many open research challenges regarding energy efficiency for IT and for wireless sensor networks, including mobile and wireless access networks, broadband access networks, home networks, vehicular networks, intelligent future wireless networks, and smart grids. It also examines emerging standards for energy-efficient protocols. Since ICT technologies touch on nearly all sectors of the economy, the concepts presented in this text offer you the opportunity to make a substantial contribution to the reduction of global greenhouse gas emissions.

Download or read book Next Generation Wireless Systems and Networks written by Hsiao-Hwa Chen and published by John Wiley & Sons. This book was released on 2006-05-01 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Next Generation Wireless Systems and Networks offers an expert view of cutting edge Beyond 3rd Generation (B3G) wireless applications. This self-contained reference combines the basics of wireless communications, such as 3G wireless standards, spread spectrum and CDMA systems, with a more advanced level research-oriented approach to B3G communications, eliminating the need to refer to other material. This book will provide readers with the most up-to-date technological developments in wireless communication systems/networks and introduces the major 3G standards, such as W-CDMA, CDMA2000 and TD-SCDMA. It also includes a focus on cognitive radio technology and 3GPP E-UTRA technology; areas which have not been well covered elsewhere. Covers many hot topics in the area of next generation wireless from the authors’ own research, including: Bluetooth, all-IP wireless networking, power-efficient and bandwidth-efficient air-link technologies, and multi-user signal processing in B3G wireless Clear, step-by-step progression throughout the book will provide the reader with a thorough grounding in the basic topics before moving on to more advanced material Addresses various important topics on wireless communication systems and networks that have emerged only very recently, such as Super-3G technology, 4G wireless, UWB, OFDMA and MIMO Includes a wealth of explanatory tables and illustrations This essential reference will prove invaluable to senior undergraduate and postgraduate students, academics and researchers. It will also be of interest to telecommunications engineers wishing to further their knowledge in this field.

Download or read book Green and Software defined Wireless Networks written by Chih-Lin I and published by Cambridge University Press. This book was released on 2019-04-25 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understand the fundamental theory and practical design aspects of green and soft wireless communications networks with this expert text. It provides comprehensive and unified coverage of 5G physical layer design, as well as design of the higher and radio access layers and the core network, drawing on viewpoints from both academia and industry. Get to grips with the theory through authoritative discussion of information-theoretical results, and learn about fundamental green design trade-offs, software-defined network architectures, and energy efficient radio resource management strategies. Applications of wireless big data and artificial intelligence to wireless network design are included, providing an excellent design reference, and real-world examples of employment in software-defined 5G networks and energy saving solutions from wireless communications companies and cellular operators help to connect theory with practice. This is an essential text for graduate students, professionals and researchers.

Download or read book Wireless Communication with Artificial Intelligence written by Anuj Singal and published by CRC Press. This book was released on 2022-09-16 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference text discusses advances in wireless communication, design challenges, and future research directions to design reliable wireless communication. The text discusses emerging technologies including wireless sensor networks, Internet of Things (IoT), cloud computing, mm-Wave, Massive MIMO, cognitive radios (CR), visible light communication (VLC), wireless optical communication, signal processing, and channel modeling. The text covers artificial intelligence-based applications in wireless communication, machine learning techniques and challenges in wireless sensor networks, and deep learning for channel and bandwidth estimation during optical wireless communication. The text will be useful for senior undergraduate, graduate students, and professionals in the fields of electrical engineering, and electronics and communication engineering.

Download or read book Green Communication Technologies for Future Networks written by Gurjit Kaur and published by CRC Press. This book was released on 2022-10-31 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores all the energy-efficient communication technologies used for various communication systems and every aspect of these systems, such as green electronics, network protocols, handover, codes, antenna, and the role of artificial intelligence and IoT, including the energy management strategies. It identifies the development of sustainable plans and programs at the communication level within the current legislative framework. Features: Gives a fundamental description of the green communications including granularities of green wired and wireless systems. Describes a comprehensive review of innovations, challenges, and opportunities for green communication. Provides guiding principles on how to build the green communication network. Includes a holistic view of both wireless and wired green communication systems with an emphasis on applications and challenges in each area. Suggests various ways of benchmarking and measuring the performance of green communication systems. This book will be of great interest to graduate students and researchers in green technologies, communications, wireless communication, optical communication, underwater communication, microwave and satellite communication, networking, the internet of things, and energy management.

Download or read book Green Communication in 4G Wireless Systems written by Shahid Mumtaz and published by River Publishers. This book was released on 2013-03-15 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Green communication has emerged as one of the most important research topics for radio systems. This leads us to develop an energy-efficient mechanism which adjusts transmission power according to the traffic load and reduces the energy per bit usage. For the vision of Europe 2020 as a smart, sustainable and inclusive economy to become reality, the EU have set forth the 20:20:20 targets by which greenhouse gas emissions and energy reduction of primary use should be reduced by 20% while 20% of energy consumption should come from renewable resources. In fact, in today's energy-conscious society, Information and Communication Technology (ICT) accounts for 2% of the global CO2 emissions. A medium-sized cellular network uses as much energy as 170,000 homes, while the cost of powering the existing BSs accounts for a staggering 50% of a service provider's overall expenses. Therefore, new solutions are required whereby operators can accommodate additional traffic volume whilst reducing their investment in new infrastructure and beyond that significantly reduces their energy bill. Moreover, the EU political agenda, in unison with expected growth in mobile data, has identified cost and energy per bit reduction as a stringent design requirement for mobile networks of the future. Green Communication for 4G Wireless Systems mainly covers energy efficient techniques in physical, MAC and network layers. Cross-layer energy efficiency optimization in time and frequency has been also discussed with two fundamental tradeoffs, energy efficiency and spectral efficiency. This technical introduction to Green Communication in 4G wireless systems, explaining the rather complex standards (3GPP Releases R10 and R11), is a must-read for engineers, decision-makers and students interested in Green Communication, as well as other researchers and scientists from this evolving field.

Download or read book Third Generation Systems and Intelligent Wireless Networking written by J. S. Blogh and published by John Wiley & Sons. This book was released on 2002-04-29 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: Of Non-Wraparound Network Performance -- Wrap-around Network Performance Results -- Performance Results over a LOS Channel -- Performance Results over a Multipath Channel -- Performance over a Multipath Channel using Power Control -- Performance of an AQAM based Network using Power Control -- UTRA, Adaptive Arrays and Adaptive Modulation -- Direct Sequence Code Division Multiple Access -- UMTS Terrestrial Radio Access -- Spreading and Modulation -- Common Pilot Channel -- Power Control -- Uplink Power Control -- Downlink Power Control -- Soft Handover -- Signal-to-Interference plus Noise Ratio Calculations -- Downlink -- Uplink -- Multi-User Detection -- Simulation Results -- Simulation Parameters -- The Effect of Pilot Power on Soft Handover Results -- Fixed Received Pilot Power Thresholds without Shadowing -- Fixed Received Pilot Power Thresholds with 0.5 Hz Shadowing -- Fixed Received Pilot Power Thresholds with 1.0 Hz Shadowing -- Relative Received Pilot Power Thresholds without Shadowing -- Relative Received Pilot Power Thresholds with 0.5 Hz Shadowing -- Relative Received Pilot Power Thresholds with 1.0 Hz Shadowing -- E[subscript c]/I[subscript o] Power Based Soft Handover Results -- Fixed E[subscript c]/I[subscript o] Thresholds without Shadowing -- Fixed E[subscript c]/I[subscript o] Thresholds with 0.5 Hz Shadowing -- Fixed E[subscript c]/I[subscript o] Thresholds with 1.0 Hz Shadowing -- Relative E[subscript c]/I[subscript o] Thresholds without Shadowing.