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Author: Yuzhe Yao Publisher: ISBN: Category : Languages : en Pages :
Book Description
Synchronization is one of the most important issues in wireless communication systems design and implementation. The requirement for synchronization is going high as the signal bandwidth and the system complexity increases. For instance, the ultra-short pulse width in ultra-wideband (UWB) communication systems poses problems to the conventional timing synchronization methods and the multi-node transmission poses problems to the existing carrier frequency offset (CFO) synchronization methods. Moreover, the impact of imperfect synchronization in these systems on the system performance is more negative than that of the conventional communication systems. Therefore, efficient synchronization algorithms are really in need. This dissertation presents several synchronization methods aiming to either improve the synchronization performance or reduce the synchronization complexity. The focus of this dissertation is on UWB systems and cooperative systems. Both timing synchronization and carrier frequency synchronization problems have been investigated. Several different systems are considered, including the point to point block transmission based UWB communications, orthogonal frequency division multiplexing (OFDM) based one way and two way relaying communication systems and narrow band cooperative communication systems. For block transmission UWB systems, i.e., both OFDM and single carrier frequency domain equalization (SC-FDE) UWB systems, a new generic timing estimation method based on channel impulse response (CIR) estimation is proposed. The newly proposed method is superior to the existing methods not only in synchronization performance, but also in the algorithm complexity. For the multi-node cooperative communications, the CFO mitigation issue is studied with OFDM signaling. Due to the distributed nature of the cooperative system, the multiple CFO problem is inevitable and hard to solve. A two-step compensation scheme is designed to suppress the interference introduced by multiple CFO with low complexity. Moreover, timing synchronization in cooperative communications is studied, including the broadband OFDM based cooperative communication and the narrow band cooperative communication. A means of determining the optimal timing of the OFDM signal in asynchronous two way relay networks (TWRN) has been designed. A correlation based multi-delay estimation method is proposed for narrow band asynchronous cooperative communication systems. The synchronization issues covering both timing and carrier synchronization have been extensively studied in this dissertation. New synchronization methods have been proposed for the emerging transmission schemes such as high rate UWB transmission and the distributed cooperative transmission with challenges different from conventional wireless transmission schemes.
Author: Yuzhe Yao Publisher: ISBN: Category : Languages : en Pages :
Book Description
Synchronization is one of the most important issues in wireless communication systems design and implementation. The requirement for synchronization is going high as the signal bandwidth and the system complexity increases. For instance, the ultra-short pulse width in ultra-wideband (UWB) communication systems poses problems to the conventional timing synchronization methods and the multi-node transmission poses problems to the existing carrier frequency offset (CFO) synchronization methods. Moreover, the impact of imperfect synchronization in these systems on the system performance is more negative than that of the conventional communication systems. Therefore, efficient synchronization algorithms are really in need. This dissertation presents several synchronization methods aiming to either improve the synchronization performance or reduce the synchronization complexity. The focus of this dissertation is on UWB systems and cooperative systems. Both timing synchronization and carrier frequency synchronization problems have been investigated. Several different systems are considered, including the point to point block transmission based UWB communications, orthogonal frequency division multiplexing (OFDM) based one way and two way relaying communication systems and narrow band cooperative communication systems. For block transmission UWB systems, i.e., both OFDM and single carrier frequency domain equalization (SC-FDE) UWB systems, a new generic timing estimation method based on channel impulse response (CIR) estimation is proposed. The newly proposed method is superior to the existing methods not only in synchronization performance, but also in the algorithm complexity. For the multi-node cooperative communications, the CFO mitigation issue is studied with OFDM signaling. Due to the distributed nature of the cooperative system, the multiple CFO problem is inevitable and hard to solve. A two-step compensation scheme is designed to suppress the interference introduced by multiple CFO with low complexity. Moreover, timing synchronization in cooperative communications is studied, including the broadband OFDM based cooperative communication and the narrow band cooperative communication. A means of determining the optimal timing of the OFDM signal in asynchronous two way relay networks (TWRN) has been designed. A correlation based multi-delay estimation method is proposed for narrow band asynchronous cooperative communication systems. The synchronization issues covering both timing and carrier synchronization have been extensively studied in this dissertation. New synchronization methods have been proposed for the emerging transmission schemes such as high rate UWB transmission and the distributed cooperative transmission with challenges different from conventional wireless transmission schemes.
Author: Stefano Bregni Publisher: John Wiley & Sons ISBN: Category : Technology & Engineering Languages : en Pages : 446
Book Description
Network synchronization deals with the distribution of time and frequency across a network of clocks often spread over a wide geographical area. The goal is to align (i.e. synchronize) the time and frequency scales of all clocks, by using the communication capacity of their interconnecting links. Network synchronization plays a central role in digital telecommunications as it determines the quality of most services offered by the network operator. However, the importance of network synchronization is often underestimated and how to solve quality-of-service degradation caused by synchronization difficulties can become problematical to all but a synchronization engineer. * Systematically covers a wide spectrum of both theoretical and practical topics * Features a clear and profound description of synchronous and asynchronous digital multiplexing (PDH, SDH), jitter and timing aspects of SDH networks * Expounds synchronization network principles and implementation issues, clock modelling, time and frequency measurement * Presents recent advances in telecommunications clock characterization and measurement If you are a system engineer, researcher, designer or postgraduate student searching for both the basics and an insight into more advanced areas currently under discussion then you will find Synchronization of Digital Telecommunications Networks an enlightening read. It will also prove to be a valuable sourcebook for senior undergraduates and technical personnel in telecommunications companies.
Author: Radha Poovendran Publisher: Springer Science & Business Media ISBN: 0387462767 Category : Technology & Engineering Languages : en Pages : 396
Book Description
This book presents the latest research results in the area of secure localization for both wireless mobile ad hoc networks and wireless sensor networks. It is suitable as a text for computer science courses in wireless systems and security. It includes implementation studies with mica2 mote sensors. Due to the open spectrum nature of wireless communication, it is subject to attacks and intrusions. Hence the wireless network synchronization needs to be both robust and secure. Furthermore, issues such as energy constraints and mobility make the localization process even more challenging. The book will also interest developers of secure wireless systems.
Author: Rolf Kraemer Publisher: John Wiley & Sons ISBN: 9780470740132 Category : Technology & Engineering Languages : en Pages : 368
Book Description
This unique book reviews the future developments of short-range wireless communication technologies Short-Range Wireless Communications: Emerging Technologies and Applications summarizes the outcomes of WWRF Working Group 5, highlighting the latest research results and emerging trends on short-range communications. It contains contributions from leading research groups in academia and industry on future short-range wireless communication systems, in particular 60 GHz communications, ultra-wide band (UWB) communications, UWB radio over optical fiber, and design rules for future cooperative short-range communications systems. Starting from a brief description of state-of-the-art, the authors highlight the perspectives and limits of the technologies and identify where future research work is going to be focused. Key Features: Provides an in-depth coverage of wireless technologies that are about to start an evolution from international standards to mass products, and that will influence the future of short-range communications Offers a unique and invaluable visionary overview from both industry and academia Identifies open research problems, technological challenges, emerging technologies, and fundamental limits Covers ultra-high speed short-range communication in the 60 GHz band, UWB communication, limits and challenges, cooperative aspects in short-range communication and visible light communications, and UWB radio over optical fiber This book will be of interest to research managers, R&D engineers, lecturers and graduate students within the wireless communication research community. Executive managers and communication engineers will also find this reference useful.
Author: Erchin Serpedin Publisher: Cambridge University Press ISBN: 0521764424 Category : Computers Languages : en Pages : 245
Book Description
Presents the key clock synchronization protocols, emphasizing design and optimization techniques for building efficient estimation schemes and performance benchmarks.
Author: Anuj Singal Publisher: CRC Press ISBN: 1000645347 Category : Technology & Engineering Languages : en Pages : 343
Book Description
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.
Author: Mohsen Guizani Publisher: Springer Science & Business Media ISBN: 0306486423 Category : Computers Languages : en Pages : 722
Book Description
Since the early 1990s, the wireless communications field has witnessed explosive growth. The wide range of applications and existing new technologies nowadays stimulated this enormous growth and encouraged wireless applications. The new wireless networks will support heterogeneous traffic, consisting of voice, video, and data (multimedia). This necessitated looking at new wireless generation technologies and enhance its capabilities. This includes new standards, new levels of Quality of Service (QoS), new sets of protocols and architectures, noise reduction, power control, performance enhancement, link and mobility management, nomadic and wireless networks security, and ad-hoc architectures. Many of these topics are covered in this textbook. The aim of this book is research and development in the area of broadband wireless communications and sensor networks. It is intended for researchers that need to learn more and do research on these topics. But, it is assumed that the reader has some background about wireless communications and networking. In addition to background in each of the chapters, an in-depth analysis is presented to help our readers gain more R&D insights in any of these areas. The book is comprised of 22 chapters, written by a group of well-known experts in their respective fields. Many of them have great industrial experience mixed with proper academic background.
Author: Norihiko Morinaga Publisher: Springer Science & Business Media ISBN: 0306473267 Category : Technology & Engineering Languages : en Pages : 333
Book Description
During 12-15 of September 1999, 10th International Symposium on P- sonal, Indoor and Mobile Radio Communications (PIMRC’99) was held in Osaka Japan, and it was really a successful symposium that accommodated more than 600 participants from more than 30 countries and regions. PIMRC is really well organized annual symposium for wireless multimedia commu- cation systems, in which, various up-to-date topics are discussed in the invited talk, panel discussions and tutorial sessions. One of the unique features of the PIMRC is that PIMRC is continuing to publish, from Kluwer Academic Publishers since 1997, a book that collects the hottest topics discussed in PIMRC. In PIMRC’97, Invited talks were sum- rized in “Wireless Communications –TDMA versus CDMA – (ISBN 0-7923- 8005-3),” and it was published just beforePIMRC’97. This book was also distributed to all the PIMRC’97 participants as a part of proceedings for the conference. In PIMRC’98, extendedversion of the invited papers were s- marized in Wireless Multimedia Network Technologies (ISBN 0-7923-8633- 7) and published in September 1999, which is almost the same timing for the PIMRC’99. In the case of PIMRC’99, to produce more informative book, we have - lected topics that attracted many PIMRC’99 participants during the conf- ence, and invited prospective authors not only from the invited speakers but also from tutorial speakers, panel organizers, panelists, and some other exc- lent PIMRC’99 participants.
Author: Bernhard Etzlinger Publisher: Foundations and Trends in Signal Processing ISBN: 9781680834345 Category : Languages : en Pages : 116
Book Description
Modern day networking and computing systems rely increasingly on knowing the location of the user. These include state-of-the art technologies such as navigation of vehicles and robots, traffic planning, or light control in smart home environments. In the future, even more services will appear. The predominant localization technology currently uses satellite signals but this only works outdoors, is expensive, and consumes considerable power. Alternative localization technologies have been recently developed using optical, ultra-sound, or radar techniques. All of these require additional hardware components to work effectively. Radio-frequency (RF) localization is a technique that uses communication signals to perform the task without the need for any extra hardware. This monograph addresses the role of synchronization in radio localization and provides a comprehensive overview of recent developments suitable for current and future practical implementations. The material is intended for both theoreticians and practitioners and is written to be accessible to novices while covering state-of-the-art topics of interest to advanced researchers of localization and synchronization systems.
Author: Yuzhe Yao
Author: Yuzhe Yao
Author: Stefano Bregni
Author: Radha Poovendran
Author: Rolf Kraemer
Author: Fuyun Ling
Author: Erchin Serpedin
Author: Anuj Singal
Author: Mohsen Guizani
Author: Norihiko Morinaga
Author: Bernhard Etzlinger