Showing papers on "Wi-Fi array published in 2021"

Wireless sensor networks architectures and protocols

Abstract: Introduction to Wireless Sensor Networks Applications and Motivation Network Performance Objectives Contributions of this Book Organization of this Book The Development of Wireless Sensor Networks Early Wireless Networks Wireless Data Networks Wireless Sensor and Related Networks Conclusion The Physical Layer Some Physical Layer Examples A Practical Physical Layer for Wireless Sensor Networks Simulations and Results Conclusion The Data Link Layer Medium Access Control Techniques The Mediation Device System Analysis and Simulation Conclusion The Network Layer Some Network Design Examples A Wireless Sensor Network Design Employing a Cluster Tree Architecture Simulations Results Conclusion Practical Implementation Issues The Partitioning Decision Transducer Interfaces Time Base Accuracy and Average Power Consumption Conclusion Power Management Power Sources Loads Voltage Converters and Regulators Power Management Strategy Conclusion Antennas and the Definition of RF Performance Antennas RF Performance Definition and Measurement Conclusion Electromagnetic Compatibility EMC: The Problem Examples of Self-Interference The Physics Associated with EMC Problems Principles of Proper Layout The Layout Process Detective/Corrective Techniques Conclusion Electrostatic Discharge The Problem Physical Properties of the Electrostatic Discharge The Effects of ESD on Integrated Circuits Modeling and Test Standards Product Design to Minimize ESD Problems Conclusion Wireless Sensor Network Standards The IEEE 802.15.4 Low-Rate WPAN Standard The ZigBee Alliance The IEEE 1451.5 Wireless Smart Transducer Interface Standard Summary and Opportunities for Future Development Summary Opportunities for Future Development Appendix A--Signal Processing Worksystem (SPW) Appendix B--WinneuRFon Motivation System Requirements Supported Features Current Status and Achievement Simulation Method and More Potential Functionalities Proposal for Future Work Summary Appendix C--The MC13192: An Example Wireless Sensor Network Transceiver Integrated Circuit (IC)

A Survey on Channel Estimation and Practical Passive Beamforming Design for Intelligent Reflecting Surface Aided Wireless Communications.

Abstract: Intelligent reflecting surface (IRS) has emerged as a key enabling technology to realize smart and reconfigurable radio environment for wireless communications, by digitally controlling the signal reflection via a large number of passive reflecting elements in real time. Different from conventional wireless communication techniques that only adapt to but have no or limited control over dynamic wireless channels, IRS provides a new and cost-effective means to combat the wireless channel impair-ments in a proactive manner. However, despite its great potential, IRS faces new and unique challenges in its efficient integration into wireless communication systems, especially its channel estimation and passive beamforming design under various practical hardware constraints. In this paper, we provide a comprehensive survey on the up-to-date research in IRS-aided wireless communications, with an emphasis on the promising solutions to tackle practical design issues. Furthermore, we discuss new and emerging IRS architectures and applications as well as their practical design problems to motivate future research.

Fundamental Wireless Performance of a Building

Abstract: Over 80% of wireless traffic already takes place in buildings. Like water, gas, and electricity, wireless communication is becoming one of the most fundamental utilities of a building. It is well known that building structures have a significant impact on in-building wireless networks. If we seek to achieve the optimal network performance indoors, the buildings should be designed with the objective of maximizing wireless performance. So far, wireless performance has not yet been considered when designing a building. In this paper, we introduce a novel and interdisciplinary concept of building wireless performance (BWP) to a wide audience in both wireless communications and building design, emphasizing its broad impacts on wireless network development and deployment, and on building layout/material design. We first give an overview of the BWP evaluation framework proposed in our state-of-the-art works and explain their interconnections. Then, we outline the potential research directions in this exciting research area to encourage further interdisciplinary research.

Introduction to Wireless Local Loop Broadband and Narrowband Systems

Abstract: Preface. Acknowledgments. Part One - Setting the Scene. Introduction. The Converging World of Telephony, Television, and Computers. Access Technologies. Part Two - Why Wireless? Telecommunications Environments World-Wide. The Economics of Wireless Versus Fixed. Wireless Local Loop Markets. Part Three - Technical Information about Wireless. Radio Propagation. Radio Systems. TDMA or CDMA. Part Four - Wireless Radio Technologies. Overview of Technologies. The Cordless Technologies. The Cellular Technologies. The Proprietary Technologies. The Broadband Technologies. Choosing the Right Technology. Looking at a Technology in Detail: CDMAOne. Part Five - Deploying Wireless Local Loop Systems. Getting a License. Choosing a Service Offering. Developing the Business Case. Rolling Out the Network. Case Study. The Future. List of Acronyms and Abbreviations. About the Author. Index.