Download or read book Interference Avoidance Methods for Wireless Systems written by Dimitrie Popescu and published by Springer Science & Business Media. This book was released on 2006-04-11 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interference Avoidance Methods for Wireless Systems is an introduction to wireless techniques useful for uncoordinated unlicensed band systems, which use adaptive transmitters and receivers. The book provides a comprehensive theoretical analysis of interference avoidance algorithms in a general signal space framework that applies to a wide range of wireless communication scenarios with multiple users accessing the same communication resources. This book will be of interest to researchers, graduate students, and engineers working in the area of wireless communications as well as to technology policy makers working on radio frequency spectrum allocation. The book can also be used as a supplement text to advanced topics graduate courses in the area of wireless communication systems.

Download or read book Interference Avoidance for Wireless Systems written by Dimitrie C. Popescu and published by . This book was released on 2002 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interference Avoidance for Wireless Systems with Multiple Receivers written by Otili Popescu and published by . This book was released on 2004 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rate Splitting Methods for Interference Management in Cellular Wireless Systems written by Guangxia Zhou and published by Logos Verlag Berlin GmbH. This book was released on 2018-11-01 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, rate-splitting based interference exploitation has been investigated in order to bridge theory and practice. The results shows that conventional detection-decoding techniques cannot provide desirable results within a reasonable complexity and thereby substantially reduce interference mitigation gains. A multi-layer rate splitting scheme is proposed to deal with this obstacle. This multi-layer rate splitting scheme can approach or achieve the same maximum sum rate as that achieved by joint decoding.

Download or read book Signal Interference in WiFi and ZigBee Networks written by Gaotao Shi and published by Springer. This book was released on 2016-10-24 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book systematically summarizes the fundamentals of WiFi and ZigBee from different levels and provides the detailed theoretical and experimental results for signal interference between these two wireless data transmission technologies. The existing mechanisms and methods of interference mitigation, avoidance and co-existence are carefully explored. Both collaboration and cross-technology communication between WiFi and ZigBee are also introduced as key research trends. Due to the popularity of WiFi and ZigBee, which share the same ISM frequency band, interference is a common problem and addressed in a wide range of literature. This book condenses the newest research results into an approachable format. This is an essential resource for professionals and students in wireless networks as well as network engineers, designers, or planners seeking a backbone of knowledge in WiFi and ZigBee networks.

Download or read book Embracing Interference in Wireless Systems written by Shyamnath Gollakota and published by Morgan & Claypool. This book was released on 2014-06-01 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: The wireless medium is a shared resource. If nearby devices transmit at the same time, their signals interfere, resulting in a collision. In traditional networks, collisions cause the loss of the transmitted information. For this reason, wireless networks have been designed with the assumption that interference is intrinsically harmful and must be avoided. This book, a revised version of the author's award-winning Ph.D. dissertation, takes an alternate approach: Instead of viewing interference as an inherently counterproductive phenomenon that should to be avoided, we design practical systems that transform interference into a harmless, and even a beneficial phenomenon. To achieve this goal, we consider how wireless signals interact when they interfere, and use this understanding in our system designs. Specifically, when interference occurs, the signals get mixed on the wireless medium. By understanding the parameters of this mixing, we can invert the mixing and decode the interfered packets; thus, making interference harmless. Furthermore, we can control this mixing process to create strategic interference that allow decodability at a particular receiver of interest, but prevent decodability at unintended receivers and adversaries. Hence, we can transform interference into a beneficial phenomenon that provides security. Building on this approach, we make four main contributions: We present the first WiFi receiver that can successfully reconstruct the transmitted information in the presence of packet collisions. Next, we introduce a WiFi receiver design that can decode in the presence of high-power cross-technology interference from devices like baby monitors, cordless phones, microwave ovens, or even unknown technologies. We then show how we can harness interference to improve security. In particular, we develop the first system that secures an insecure medical implant without any modification to the implant itself. Finally, we present a solution that establishes secure connections between any two WiFi devices, without having users enter passwords or use pre-shared secret keys.

Download or read book Interference Analysis and Reduction for Wireless Systems written by Peter Stavroulakis and published by Artech House. This book was released on 2003 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: This leading-edge resource offers you a new methodology for analyzing and studying the behavior of wireless communication systems in an interference environment. It provides you with modern tools and techniques for use in real-world applications that help you guarantee optimum system performance. The book treats both additive and multiplicative interfering signals, including in-depth descriptions of how these signals behave, regardless of the source.

Download or read book Platform Interference in Wireless Systems written by Kevin Slattery and published by Newnes. This book was released on 2011-04-08 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intra-system EMC problems are becoming increasingly common in mobile devices, ranging from notebook PCs to cell phones, with RF/wireless capbilities. These issues range from minor annoyances to serious glitches which impede the functioning of the device. This book gives a thourough review of electromagnetic theory (including Maxwell's equations), discusses possible sources and causes of intra-system interference, shows to use models and analysis to discover potential sources of intra-system EMC in a design, how to use appropriate tests and measurements to detect intra-system EMC problems, and finally extensively discusses measures to mitigate or totally eliminate intra-system EMC problems. With more and more mobile devices incorporating wirless capability (often with multiple wireless systems, such as Bluetooth and WiFi), this book should be part of the reference shelf of every RF/wireless engineer and mobile device designer. Addresses a growing problem in RF/wireless devices----interference created inside the devices, which impair their operation Covers devices, ranging from laptop PCs to mobile phones to Bluetooth headsets Explains the sources of such intra-system interference, how to detect and measure such interference, design techniques for mitigating the interference, and proven techniques for eliminating the interference

Download or read book Interference in Large Wireless Networks written by Martin Haenggi and published by Now Publishers Inc. This book was released on 2009 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since interference is the main performance-limiting factor in most wireless networks, it is crucial to characterize the interference statistics. The main two determinants of the interference are the network geometry (spatial distribution of concurrently transmitting nodes) and the path loss law (signal attenuation with distance). For certain classes of node distributions, most notably Poisson point processes, and attenuation laws, closed-form results are available, for both the interference itself as well as the signal-to-interference ratios, which determine the network performance. This monograph presents an overview of these results and gives an introduction to the analytical techniques used in their derivation. The node distribution models range from lattices to homogeneous and clustered Poisson models to general motion-invariant ones. The analysis of the more general models requires the use of Palm theory, in particular conditional probability generating functionals, which are briefly introduced in the appendix.

Download or read book Resource Allocation in Uplink OFDMA Wireless Systems written by Elias Yaacoub and published by John Wiley & Sons. This book was released on 2012-03-13 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tackling problems from the least complicated to the most, Resource Allocation in Uplink OFDMA Wireless Systems provides readers with a comprehensive look at resource allocation and scheduling techniques (for both single and multi-cell deployments) in uplink OFDMA wireless networks relying on convex optimization and game theory to thoroughly analyze performance. Inside, readers will find topics and discussions on: Formulating and solving the uplink ergodic sum-rate maximization problem Proposing suboptimal algorithms that achieve a close performance to the optimal case at a considerably reduced complexity and lead to fairness when the appropriate utility is used Investigating the performance and extensions of the proposed suboptimal algorithms in a distributed base station scenario Studying distributed resource allocation where users take part in the scheduling process, and considering scenarios with and without user collaboration Formulating the sum-rate maximization problem in a multi-cell scenario, and proposing efficient centralized and distributed algorithms for intercell interference mitigation Discussing the applicability of the proposed techniques to state-of-the-art wireless technologies, LTE and WiMAX, and proposing relevant extensions Along with schematics and figures featuring simulation results, Resource Allocation in Uplink OFDMA Wireless Systems is a valuable book for?wireless communications and cellular systems professionals and students.

Download or read book Guide to Industrial Wireless Systems Deployments written by National Institute National Institute of Standards and Technology and published by Createspace Independent Publishing Platform. This book was released on 2018-04-30 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: NIST AMS 300-4 Printed in COLOR April 2018 This document provides best-practice guidelines for an integrated methodology that aims to enable, assess, and assure the real-time performance of secure wireless systems in smart manufacturing systems. These guidelines also aim to enable users, manufacturers, technology providers, and solution providers to design, select, deploy, configure, and assess robust, safe, reliable, and secure integrated wireless systems, with consideration of any co-existence and interference avoidance issues in smart manufacturing systems. This document is intended to be used as a practical guide by control engineers, operational technology professionals, information technology professionals, chief executives, security executives, factory floor managers, and wireless system integrators interested in deploying wireless systems in industrial environments. Why buy a book you can download for free? We print this book so you don't have to. First you gotta find a good clean (legible) copy and make sure it's the latest version (not always easy). Some documents found on the web are missing some pages or the image quality is so poor, they are difficult to read. We look over each document carefully and replace poor quality images by going back to the original source document. We proof each document to make sure it's all there - including all changes. If you find a good copy, you could print it using a network printer you share with 100 other people (typically its either out of paper or toner). If it's just a 10-page document, no problem, but if it's 250-pages, you will need to punch 3 holes in all those pages and put it in a 3-ring binder. Takes at least an hour. It's much more cost-effective to just order the latest version from Amazon.com This book includes original commentary which is copyright material. Note that government documents are in the public domain. We print these large documents as a service so you don't have to. The books are compact, tightly-bound, full-size (8 1⁄2 by 11 inches), with large text and glossy covers. If you like the service we provide, please leave positive review on Amazon.com.

Download or read book Cross layer Framework for Interference Avoidance in Cognitive Radio Ad hoc Networks written by Minh thao Quach and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fixed spectrum assignment scheme has a problem with resource deficiency in a wireless network. In 2002, the US Federal Communication Commission (FCC) reported that the radio spectrum was 20% to 85% under-utilized. The insufficient use of the spectrum is a critical issue for radio communication; as communication grows, a fixed spectrum becomes more limiting. The FCC then changed its spectrum management policy to make it more flexible by investigating the cognitive radio (CR) approach. Cognitive radio is a type of intelligent radio that explores the radio frequency environment, learns, and decides to use the unused portion of the frequency. The main functions of a CR are sensing, decision making, and sharing. However, these radios have to respect the standard wireless infrastructures by ensuring the least impact with their devices, also known as primary radios. Coexistence between CR systems and primary systems requires dedicated observation processes and interference management. In this thesis, observation from a CR point of view is presented. The overlapping area between a CR transmitter and primary radio (PR) transmitter is analysed so that it can be taken into account. The impact of this area is learnt by simulation and presented in Chapter 4. As a consequence, potential interference is envisaged. Along with observation, we investigate a proper mechanism to better prevent perturbation on PR devices using the Grey model and Kalman filter as a prediction model for predicting the density of primary receivers. In addition, we provide a strategy to combine the obtained observations into a metric that can be used in routing design in the context of coexistence between Cognitive Radio Networks (CRNs) and primary networks. The proposed strategy, using fuzzy logic, is presented in Chapter 5. In this chapter, we investigate how the routing layer reacts and makes the right decisions to maximise the spectrum resources, while avoiding interference with the primary receivers. For instance, a CR node can operate in an overlap region if primary receivers are inactive within this area. Also, we propose a routing mechanism based on the DYMO routing protocol that takes into account the observed relative impact. In the same chapter, we provide some practical scenarios illustrating the usefulness of our proposal. Interconnecting the CR nodes in CRNs is also a critical problem for the establishment of the network. We therefore present a beacon-based dissemination process in Chapter 6. In this chapter, we also describe a practical device designed for cognitive radio experiments. Even though our work affects different protocol layers, the designed framework is cross-layered. Indeed, the different components of the proposed framework access the various layers to retrieve information, process it, and react accordingly. Thus, our work constitutes a cross-layer framework for a local cognitive radio that aims to minimise the interference and maximise the network resources in cognitive radio networks.

Download or read book Full Duplex Wireless Communications Systems written by Tho Le-Ngoc and published by Springer. This book was released on 2017-07-02 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the development of self-interference (SI)-cancellation techniques for full-duplex wireless communication systems. The authors rely on estimation theory and signal processing to develop SI-cancellation algorithms by generating an estimate of the received SI and subtracting it from the received signal. The authors also cover two new SI-cancellation methods using the new concept of active signal injection (ASI) for full-duplex MIMO-OFDM systems. The ASI approach adds an appropriate cancelling signal to each transmitted signal such that the combined signals from transmit antennas attenuate the SI at the receive antennas. The authors illustrate that the SI-pre-cancelling signal does not affect the data-bearing signal. This book is for researchers and professionals working in wireless communications and engineers willing to understand the challenges of deploying full-duplex and practical solutions to implement a full-duplex system. Advanced-level students in electrical engineering and computer science studying wireless communications will also find this book useful as a secondary textbook.

Download or read book Interference Analysis written by John Pahl and published by John Wiley & Sons. This book was released on 2016-06-13 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book describes how interference can be managed so that radio systems co-exist, without harmful mutual effects, within a finite amount of spectrum. This is timely in view of the increasing proliferation of wireless systems. It covers both the processes, such as regional or international coordination, as well as the engineering principles. Written by an author with extensive experience in the industry, it describes in detail the main methodologies for calculating or computing the interference between radio systems of the same type, and also between radio systems of different types

Download or read book Practical Interference Avoidance Protocols for Cognitive Radio Networks written by Robert Murawski and published by . This book was released on 2011 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Cognitive radios are devices which have the ability to adjust their communication parameters based on observations of the surrounding environment. Cognitive Radio Networks (CRNs) are envisioned for use in licensed communication channels, operating on 'borrowed' spectrum in a non-interference manner. This technology has the potential to revolutionize wireless communication and alleviate the overuse of certain unlicensed communication bands. Research in this area is relatively new, and significant effort must be placed into researching how cognitive radio devices can operate with a reasonably low effect on the licensed spectrum users. In this dissertation, three areas are researched, focusing on practical mechanisms which can provide service to CRNs while minimizing the impact on licensed users. First, a cross-layer routing selection algorithm is proposed which utilizes fuzzy-logic modeling to gracefully map network quality of service (QoS) requirements and CRN-aware requirements to a route cost function. The second method looks into utilizing cooperation between licensed users and cognitive radios to facilitate CRN communication while improving the throughput of licensed users. Finally, the use of directional transmissions is researched. Directional transmissions have the potential to significantly reduce the impact of cognitive radios on licensed users, however, directional transmissions introduce many complexities to the realm of wireless communication. Some of these complexities will be explored, along with practical and implementable solutions.

Download or read book Third Generation Wireless Systems Post Shannon signal architectures written by George M. Calhoun and published by Artech House. This book was released on 2003 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: Get the fundamental concepts, latest design techniques, and the most advanced architectures for tackling critical wireless communication problems such as capacity, error correction, and channel interference with this new book. It provides you with concepts that include signal interference avoidance and management as part of the design, and other forms of signal hardening -- such as error correction, advanced coding, and convolution -- and signal-shaping techniques -- such as source coding, baseband signal shaping, adaptive air interfaces, RF signal shaping, and smart antenna technologies.

Download or read book Cognitive Radio Networks written by Yang Xiao and published by CRC Press. This book was released on 2008-12-24 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fueled by ongoing and increasing consumer demand, the explosive growth in spectrum-based communications continues to tax the finite resources of the available spectrum. One possible solution, Cognitive Radio Network (CRN), allows unlicensed users opportunistic access to licensed bands without interfering with existing users. Although some initial s