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Author: Rizwan Masood
Publisher:
ISBN:
Category :
Languages : fr
Pages : 191
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Book Description
Cette thèse trouve sa place dans le cadre du projet BoWI qui signifie l'interaction entre le monde et le corps et qui présente une nouvelle et innovante inspiration des réseaux corporal sans fil (WBANs). Les principales contributions scientifiques de cette thèse se concentrent sur deux thèmes principaux pour des applications WBAN: (i) caractérisation du canal radio et (ii) la conception de l'antenne avec des performances stables à proximité du corps humain tout en offrant des caractéristiques réglables tel que le diagramme de rayonnement et de polarisation. Pour le premier projet, les capteurs intelligents ont été utilisés incorporant des antennes puce ultra-miniaturisées sous la configuration de la diversité de rayonnement. Le canal off-body a été étudié à fond en tenant compte de divers paramètres radio tel que l'étalement du temps de propagation et la capacité du canal en utilisant des mesures du canal multi-trajets en temps réel. Une amélioration significative de la capacité du canal a été rapportée en exploitant les configurations MIMO 2×2 par rapport aux systèmes SISO en particulier pour un RSB élevé. L'évanouissement du canal à petite échelle a également été étudié pour les deux canaux off- et on-body à l'aide des données de mesure en temps réel. Un algorithme robuste d'ajustement a été développé à cet effet, et les modèles optimaux du premier ordre d'évanouissement ont été rapportés pour les deux types de canaux on- et off-body. Pour les études de canaux numériques, un simulateur du canal robuste a également été développé en utilisant une antenne puce électriquement petite sur des morphologies réelles en 3D avec des gestes réglables en tenant compte diverses améliorations telles que les techniques de raffinement et de réduction de maillage local, offrant ainsi le pouvoir de simuler des scénarios de WBASN arbitraires sous des ressources limitées. La portée du simulateur du canal a également été démontrée pour plusieurs postures du corps montrant son intérêt pour la classification de posture tel qu'il est utilisé dans le projet BoWI pour la reconnaissance gestuelle interactive. Pour le deuxième sous-projet, diverses études de simulation ont d'abord été entreprises pour examiner l'impact critique du corps humain sur les performances de l'antenne. Les topologies d'antennes avec des performances stables sur le corps et les diagrammes de rayonnement appropriés ont été conçues pour des applications on- et off-body telles que l'antenne Inverted-F et l'antenne patch anneau court-circuité. Sur la base de la théorie de mode caractéristique d'antennes patch, une antenne bi-mode a été conçue fournissant la diversité de rayonnement et de polarisation. L'antenne offre des caractéristiques de rayonnement appropriées à la fois pour des applications on- et off-body à fréquence unique, tout en présentant un couplage croisé négligeable entre les deux modes et une performance stable sur le corps. L'antenne est également un candidat approprié pour des applications de la diversité et des applications MIMO tout en offrant un gain de diversité raisonnable (~10 dB). Enfin, les performances de la diversité de rayonnement et de polarisation ont été démontrées pour des applications portables. Des améliorations significatives dans le budget de liaison ont été rapportées et renforcées par des simulations et des mesures.
Author: Rizwan Masood
Publisher:
ISBN:
Category :
Languages : fr
Pages : 191
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Book Description
Cette thèse trouve sa place dans le cadre du projet BoWI qui signifie l'interaction entre le monde et le corps et qui présente une nouvelle et innovante inspiration des réseaux corporal sans fil (WBANs). Les principales contributions scientifiques de cette thèse se concentrent sur deux thèmes principaux pour des applications WBAN: (i) caractérisation du canal radio et (ii) la conception de l'antenne avec des performances stables à proximité du corps humain tout en offrant des caractéristiques réglables tel que le diagramme de rayonnement et de polarisation. Pour le premier projet, les capteurs intelligents ont été utilisés incorporant des antennes puce ultra-miniaturisées sous la configuration de la diversité de rayonnement. Le canal off-body a été étudié à fond en tenant compte de divers paramètres radio tel que l'étalement du temps de propagation et la capacité du canal en utilisant des mesures du canal multi-trajets en temps réel. Une amélioration significative de la capacité du canal a été rapportée en exploitant les configurations MIMO 2×2 par rapport aux systèmes SISO en particulier pour un RSB élevé. L'évanouissement du canal à petite échelle a également été étudié pour les deux canaux off- et on-body à l'aide des données de mesure en temps réel. Un algorithme robuste d'ajustement a été développé à cet effet, et les modèles optimaux du premier ordre d'évanouissement ont été rapportés pour les deux types de canaux on- et off-body. Pour les études de canaux numériques, un simulateur du canal robuste a également été développé en utilisant une antenne puce électriquement petite sur des morphologies réelles en 3D avec des gestes réglables en tenant compte diverses améliorations telles que les techniques de raffinement et de réduction de maillage local, offrant ainsi le pouvoir de simuler des scénarios de WBASN arbitraires sous des ressources limitées. La portée du simulateur du canal a également été démontrée pour plusieurs postures du corps montrant son intérêt pour la classification de posture tel qu'il est utilisé dans le projet BoWI pour la reconnaissance gestuelle interactive. Pour le deuxième sous-projet, diverses études de simulation ont d'abord été entreprises pour examiner l'impact critique du corps humain sur les performances de l'antenne. Les topologies d'antennes avec des performances stables sur le corps et les diagrammes de rayonnement appropriés ont été conçues pour des applications on- et off-body telles que l'antenne Inverted-F et l'antenne patch anneau court-circuité. Sur la base de la théorie de mode caractéristique d'antennes patch, une antenne bi-mode a été conçue fournissant la diversité de rayonnement et de polarisation. L'antenne offre des caractéristiques de rayonnement appropriées à la fois pour des applications on- et off-body à fréquence unique, tout en présentant un couplage croisé négligeable entre les deux modes et une performance stable sur le corps. L'antenne est également un candidat approprié pour des applications de la diversité et des applications MIMO tout en offrant un gain de diversité raisonnable (~10 dB). Enfin, les performances de la diversité de rayonnement et de polarisation ont été démontrées pour des applications portables. Des améliorations significatives dans le budget de liaison ont été rapportées et renforcées par des simulations et des mesures.
Author: Peter S. Hall
Publisher: Artech House
ISBN: 1608073769
Category : Technology & Engineering
Languages : en
Pages : 404
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Book Description
Now in a newly updated and revised edition, this timely resource provides you with complete and current details on the theory, design, and applications of wireless antennas for on-body electronic systems. The Second Edition offers readers brand new material on advances in physical phantom design and production, recent developments in simulation methods and numerical phantoms, descriptions of methods for simulation of moving bodies, and the use of the body as a transmission channel. You also find a completely revised chapter on channel characterization and antenna design at microwave frequencies. This cutting-edge volume brings you the state-of-the-art in existing applications like Bluetooth headsets together with detailed treatment of techniques, tools, and challenges in developing on-body antennas for an array of medical, emergency response, law enforcement, personal entertainment, and military applications on the horizon. The book briefs you on energy propagation around and into the body and how to estimate performance of on-body wireless links, and then dives into the nuts-and-bolts of designing antenna systems that deliver the goods. It covers on-body communication channels at microwave frequency bands and at low frequency bands, as well as ultra wideband systems for WPANs and WBANs. You get details on body-centric UWB antennas and channels, as well as advances in wearable mobile, EBG, and smart fabricù antennas for cellular and WLAN communications. Chapters on telemedicine applications, such as remote diagnoses, and implantable medical devices cover crucial propagation issues and other obstacles that need to be addressed. Rounding out the coverage is a section on antenna design for body-sensor networks and their emerging military and space applications. Packed with hands-on guidance from noted experts, this volume will be indispensable for your efforts in designing and improving body-centric communication systems.
Author: Guang-Zhong Yang
Publisher: Springer
ISBN: 1447163745
Category : Computers
Languages : en
Pages : 572
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Book Description
The last decade has witnessed a rapid surge of interest in new sensing and monitoring devices for wellbeing and healthcare. One key development in this area is wireless, wearable and implantable in vivo monitoring and intervention. A myriad of platforms are now available from both academic institutions and commercial organisations. They permit the management of patients with both acute and chronic symptoms, including diabetes, cardiovascular diseases, treatment of epilepsy and other debilitating neurological disorders. Despite extensive developments in sensing technologies, there are significant research issues related to system integration, sensor miniaturisation, low-power sensor interface, wireless telemetry and signal processing. In the 2nd edition of this popular and authoritative reference on Body Sensor Networks (BSN), major topics related to the latest technological developments and potential clinical applications are discussed, with contents covering. Biosensor Design, Interfacing and Nanotechnology Wireless Communication and Network Topologies Communication Protocols and Standards Energy Harvesting and Power Delivery Ultra-low Power Bio-inspired Processing Multi-sensor Fusion and Context Aware Sensing Autonomic Sensing Wearable, Ingestible Sensor Integration and Exemplar Applications System Integration and Wireless Sensor Microsystems The book also provides a comprehensive review of the current wireless sensor development platforms and a step-by-step guide to developing your own BSN applications through the use of the BSN development kit.
Author: Qammer H. Abbasi
Publisher: IET
ISBN: 1849199892
Category : Medical
Languages : en
Pages : 452
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Book Description
Body-centric wireless networking (BCWN) and communications is an emerging 4G technology for short (1-5m) and very short (below 1m) range communications systems, with great potential for applications in healthcare delivery, entertainment, surveillance, and emergency services. This book brings together contributions from a multidisciplinary team of researchers in the field of wireless and mobile communications, signal processing and medical measurements, to present the underlying theory, implementation challenges and applications of this exciting new technology. Topics covered include antennas and radio systems design challenges for BCWNs; on/off body propagation and modelling at narrow band frequencies; ultra wideband radio channel characterization and system modelling for BANs; millimeter-wave radio propagation for BCWN; implantable devices and in-vivo communication challenges for medical technologies; diversity and MIMO front-ends for efficient body-centric wireless communications; on-body antennas and radio channels for GPS applications; materials characterization and flexible structure design for textile-based wearable applications in military and consumer applications; ultra wideband body-centric networks for localization and motion capture; down-scaling to the nano-scale in body-centric nano-networks; and the road ahead for body-centric wireless communication and networks. Advances in Body-Centric Wireless Communication will be of interest to researchers in academia and industry working in telecommunications engineering, antenna design, mobile and wireless networks, and healthcare technologies.
Author: Amira Meharouech Ali
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Motivated by the rising demand for remote and improved healthcare, while decreasing the cost of using network infrastructures to ensure time and data rate-constrained applications, Wireless Body Area Networks (WBANs) still form a strongly growing research field. Besides, engineers and researchers are investigating new solutions to supplement mobile communications through developing opportunities for cooperative WBANs. In this context, using network users themselves as relays could complement and extend existing infrastructure networks, while improving network capacity and promoting radio spectrum usage. Yet, network operators, that are already planning for the Internet of Things (IoT) and cloud computing technologies integration, should also think about this new possibility of creating a new type of mobile ad hoc network, where network users themselves are used as simplified ad hoc base stations, to fulfill the desire of sharing real-time information between colocated persons carrying body sensors. This emerging type of network is called Body-to-Body Network (BBN). In a BBN, a radio device situated on one person gathers the sensor data from the sensor nodes worn by that person, and transmit them to a transceiver situated on another person in the nearby area, in order to be processed or relayed to other BBN users. BBNs can find applications in a range of areas such as healthcare, team sports, military, entertainment, as well as exciting social networking experiences. Operating in the popular Industrial, Scientific and Medical (ISM) band, the communication links in a BBN will be heavily susceptible to interference between the different radio technologies sharing the limited radio spectrum. Thus, inter-body interference become an important concern for protocol design and quality of service for the BBN end user. Yet, higher layer MAC and networking mechanisms need to be in place to overcome this interference problem. To date, very few studies, that perform in-depth analysis of this type of body-centric scenario, exist. The interference problem in such distributed system, should be tackeled with distributed mechanisms, such as Game Theory. The decision makers in the game are either the WBANs/people forming the BBN or the network operators who control the inter-WBAN communicating devices. These devices have to cope with a limited transmission resource (ISM band) that gives rise to a conflict of interests. This thesis aims at exploring the opportunities to enable inter-WBAN communications by ensuring feasible sharing of the radio spectrum through two challenging research issues. First, mutual and cross-technology interference mitigation, and second, the design of a BBN specific routing protocol applied to an epidemic control application within mass gathering areas, such as the airport, as use case in this thesis. In a first phase, a game theoretical approach is proposed to resolve the distributed interference problem in BBNs. The Socially-aware Interference Mitigation (SIM) game performs twofold: at the WBAN stage, it allocates ZigBee channels to body sensors for intra-WBAN data sensing, and at the BBN stage, it allocates WiFi channels to mobile devices for inter-WBAN data transmitting and relaying. Two algorithms, BR-SIM and SORT-SIM, were developed to search for Nash equilibra to the SIM game. The first (BR-SIM) ensures best response solutions while the second (SORT-SIM) attempts to achieve tradeoff between sub-optimal solutions and short convergence time. Then, in order to highlight the social role of BBNs, the second part of this thesis is devoted to propose an epidemic control application tailored to BBNs, in indoor environment. This application implements a geographic routing protocol, that differentiates WBANs traffic and ensures real-time quarantine strategies. (...).
Author: Fernando José Velez
Publisher: Institution of Engineering and Technology
ISBN: 1785612174
Category : Technology & Engineering
Languages : en
Pages : 608
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Book Description
Continuous advances in wearables, sensors and smart Wireless Body Area Network technologies have precipitated the development of new applications for on-, in- and body-to-body wearable communications for healthcare and sport monitoring. Progress in this cross-disciplinary field is further influenced by developments in radio communication, protocols, synchronization aspects, energy harvesting and storage solutions, and efficient processing techniques for smart antennas. This book covers various scenarios and solutions using sensor devices and systems for activity recognition and their applications, including wearable communication, smart sensing, RF propagation, and measurement. The authors illustrate conceptual aspects and applications, and provide a new vision in characterising wearable technologies and the need for interoperability. Energy harvesting within wearable solutions is a key issue addressed here as it helps increase energy efficiency and reliability in wearable antennas and sensor devices.
Author: Nemai Chandra Karmakar
Publisher: Springer
ISBN: 9811069018
Category : Technology & Engineering
Languages : en
Pages : 307
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Book Description
This book presents the design, development and field trials of radio frequency based wireless monitoring system for sleep apnoea patients. It contains 4 major areas including general background of wireless monitoring technology and MIMO in wireless body area network (WBAN), microwave hardware designs, virtual MIMO in WBAN and hardware system level implementation and field trials. At components level, this book presents the design theory, process and examples of bandpass filters, lowpass filters, low profile patch antennas, power amplifiers and oscillators which are the key elements in transducer designs in the body area network and cooperative communication wireless sensor network system. At system level, this book features the hardware integration, field trial and network coding techniques. This book also gives a presentation of virtual MIMO applications, e.g. MIMO implementation using FPGA, correlation coefficient measurement. The book will create impact in the fields of wireless monitoring technology in biomedical engineering, which have been growing exponentially.
Author: Mohammad Monirujjaman Khan
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The continuous miniaturisation of sensors, as well as the progression in wearable electronics, embedded software, digital signal processing and biomedical technologies, have led to new user- centric networks, where devices can be carried in the user's pockets, attached to the user's body. Body-centric wireless communications (BCWCs) is a central point in the development of fourth generation mobile communications. Body-centric wireless networks take their place within the personal area networks, body area networks and sensor networks which are all emerging technologies that have a wide range of applications (such as, healthcare, entertainment, surveillance, emergency, sports and military). The major difference between BCWC and conventional wireless systems is the radio channels over which the communication takes place. The human body is a hostile environment from a radio propagation perspective and it is therefore important to understand and characterise the effects of the human body on the antenna elements, the radio channel parameters and, hence, system performance. This thesis focuses on the study of body-worn antennas and on-body radio propagation channels. The performance parameters of five different narrowband (2.45 GHz) and four UWB (3.1- 10.6 GHz) body-worn antennas in the presence of human body are investigated and compared. This was performed through a combination of numerical simulations and measurem~nt campaigns. Parametric studies and statistical analysis, addressing the human body effects on the performance parameters of different types of narrowband and UWB antennas have been presented. The aim of this study is to understand the human body effects on the antenna parameters and specify the suitable antenna in BCWCs at both 2.45 GHz and UWB frequencies. Extensive experimental investigations are carried out to study the effects of various antenna types on the on-body radio propagation channels as well. Results and analysis emphasize the best body-worn antenna for reliable and power-efficient on-body communications. Based on the results and analysis, a novel dual-band and dual-mode antenna is proposed for power-efficient and reliable on-body and off-body communications. The on-body performance of the DBDM antenna at 2.45 GHz is compared with other five narrowband antennas. Based on the results and analysis of six narrowband and four UWB antennas, antenna specifications and design guidelines are provided that will help in selecting the best body-worn antenna for both narrowband and UWB systems to be applied in body-centric wireless networks (BCWNs). A comparison between the narrowband and UWB antenna parameters are also provided. At the end of the thesis, the subject-speciticity of the on-body radio propagation channel at 2.45 GHz and 3-10 GHz was experimentally investigated by considering eight real human test subjects of different shapes, heights and sizes. The subject-speciticity of the on-body radio propagation channels was compared between the narrowband and UWB systems as well.
Author: Joanna Kołodziej
Publisher: Springer
ISBN: 3030162729
Category : Computers
Languages : en
Pages : 364
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Book Description
This open access book was prepared as a Final Publication of the COST Action IC1406 “High-Performance Modelling and Simulation for Big Data Applications (cHiPSet)“ project. Long considered important pillars of the scientific method, Modelling and Simulation have evolved from traditional discrete numerical methods to complex data-intensive continuous analytical optimisations. Resolution, scale, and accuracy have become essential to predict and analyse natural and complex systems in science and engineering. When their level of abstraction raises to have a better discernment of the domain at hand, their representation gets increasingly demanding for computational and data resources. On the other hand, High Performance Computing typically entails the effective use of parallel and distributed processing units coupled with efficient storage, communication and visualisation systems to underpin complex data-intensive applications in distinct scientific and technical domains. It is then arguably required to have a seamless interaction of High Performance Computing with Modelling and Simulation in order to store, compute, analyse, and visualise large data sets in science and engineering. Funded by the European Commission, cHiPSet has provided a dynamic trans-European forum for their members and distinguished guests to openly discuss novel perspectives and topics of interests for these two communities. This cHiPSet compendium presents a set of selected case studies related to healthcare, biological data, computational advertising, multimedia, finance, bioinformatics, and telecommunications.
Author: Mojtaba Fallahpour
Publisher:
ISBN:
Category : Computers
Languages : en
Pages : 0
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Book Description
An electronic device equipped with sensors and antennas is the main part of the wireless body area networking (WBAN). Such a device is placed near human body and it usually works in a populated environment with many surrounding objects (e.g., building walls). The human body and the objects can change the radiation characteristics of the antenna and impact the performance of the wireless communication system. The wireless communication system,Äôs performance is also affected by the networking layers established on top of the physical layer. Therefore, any designing method for WBAN application should be pervasive, offering a joint physical-networking layer simulation and modeling strategy. To this end, in this chapter, a comprehensive simulation and modeling method is presented. First, antenna design limitations and challenges for wireless body area networking are studied with emphasis on evaluating the antenna,Äôs performance near the human body. Then, the antenna miniaturization techniques to reduce the antennas,Äô dimension are reviewed. Later, a system level analysis and modeling are used to study short-range communication between the wearable antennas with remote nodes using IEEE 802.11g wireless networking protocol.
