Author: Dimitar Georgiev Valchev Publisher: ISBN: Category : Electronic dissertations Languages : en Pages : 132
Book Description
The wireless communication channel is charactarized by multipath propagation mechanism due to scattering by objects surrounding the communicating nodes. Unmitigated multipath propagation can be harmful due to the introduced distortion by superimposing multiple signal replicas. On the other hand, the multipath propagation can be beneficial in providing implicit diversity, as the propagation paths can be used as multiple communication channels. This dissertation thesis presents a simple method for spatial modeling of narrowband multipath channels. It presents results that have stemmed from a new approach in channel characterization - deriving the second-order fading statistics like level-crossing rate, average fade duration, and coherence distance and time from the multipath angular power distribution (APD) at the receiver antenna. First, a new method is presented for characterizing the three-dimensional angular spread of the received multipath in terms of the zeroth- and first-degree spherical harmonic coefficients of the APD, and the dependence of the average spatial correlation of the received signal envelope on that angular spread is derived. Second, the derivation of the average second-order fading channel statistics in terms of the angular spread is extended for characterizing the angular variability of the second-order fading statistics in a local area and local volume. This characterization is obtained in terms of the so-called three-dimensional multipath shape factors - an extension of an earlier work on horizontal propagation. The multipath shape factors in this work are defined in terms of the zeroth-, first- and second-degree spherical harmonic coefficients of the APD. Third, the shape factor theory has been extended for modeling mobile-to-mobile multipath channels through the joint APD at both wireless link ends. For this purpose, joint multipath shape factors have been defined in terms of the double Fourier coefficients of the joint biazimuthal APD for the two-dimensional model, or the double spherical harmonic coefficients of the joint bispherical APD for the three-dimensional model.
Author: Igor P. Kovalyov Publisher: Springer Science & Business Media ISBN: 364218863X Category : Technology & Engineering Languages : en Pages : 167
Book Description
Space Division Multiple Access is one of the most promising methods in solving the capacity problem of wireless communication systems. This book defines formulae that can be used to evaluate the limit capacity of multipath wireless channels in a particular receiving region with size limitation.
Author: Claude Oestges Publisher: Academic Press ISBN: 0128205822 Category : Computers Languages : en Pages : 396
Book Description
Inclusive Radio Communication Networks for 5G and Beyond is based on the COST IRACON project that consists of 500 researchers from academia and industry, with 120 institutions from Europe, US and the Far East involved. The book presents state-of-the-art design and analysis methods for 5G (and beyond) radio communication networks, along with key challenges and issues related to the development of 5G networks. Covers the latest research on 5G networks – including propagation, localization, IoT and radio channels Based on the International COST research project, IRACON, with 120 institutions and 500 researchers from Europe, US and the Far East involved Provides coverage of IoT protocols, architectures and applications, along with IoT applications in healthcare Contains a concluding chapter on future trends in mobile communications and networking
Author: Hao Jiang Publisher: Springer Nature ISBN: 3030328694 Category : Technology & Engineering Languages : en Pages : 194
Book Description
This book addresses the fundamental design and technical challenges for fifth generation (5G) wireless channel models, including multi-frequency bands and multi-scenarios. The book presents a strong vision for 5G wireless communication networks based on current market trends, proven technologies, and future directions. The book helps enable researchers and industry professionals to come up with novel ideas in the area of wireless heterogeneity, to minimize traffic accidents, to improve traffic efficiency, and to foster the development of new applications such as mobile infotainment. The book acts as a comprehensive reference for students, instructors, researchers, engineers, and other professionals, building their understanding of 5G and in designing 5G systems. Addresses fundamental design and technical challenges for 5G wireless channel models; Presents how to create reliable statistical channel models to capture the propagation properties between transmitters and receivers; Pertinent to researchers, engineers, and professionals in 5G.
Author: Kotsopoulos, Stavros Publisher: IGI Global ISBN: 1605661090 Category : Computers Languages : en Pages : 608
Book Description
"This book presents state-of-the-art research, developments, and integration activities in combined platforms of heterogeneous wireless networks"--Provided by publisher.
Author: Athanasios G. Kanatas Publisher: CRC Press ISBN: 1482249715 Category : Computers Languages : en Pages : 368
Book Description
The accurate design of earth–space systems requires a comprehensive understanding of the various propagation media and phenomena that differ depending on frequencies and types of applications. The choice of the relevant channel models is crucial in the design process and constitutes a key step in performance evaluation and testing of earth–space systems. The subject of this book is built around the two characteristic cases of satellite systems: fixed satellites and mobile satellite systems. Radio Wave Propagation and Channel Modeling for Earth–Space Systems discusses the state of the art in channel modeling and characterization of next-generation fixed multiple-antennas and mobile satellite systems, as well as propagation phenomena and fade mitigation techniques. The frequencies of interest range from 100 MHz to 100 GHz (from VHF to W band), whereas the use of optical free-space communications is envisaged. Examining recent research advances in space-time tropospheric propagation fields and optical satellite communication channel models, the book covers land mobile multiple antennas satellite- issues and relative propagation campaigns and stratospheric channel models for various applications and frequencies. It also presents research and well-accepted satellite community results for land mobile satellite and tropospheric attenuation time-series single link and field synthesizers. The book examines aeronautical communications channel characteristics and modeling, relative radio wave propagation campaigns, and stratospheric channel model for various applications and frequencies. Propagation effects on satellite navigation systems and the corresponding models are also covered.
Author: Management Association, Information Resources Publisher: IGI Global ISBN: 1609601963 Category : Games & Activities Languages : en Pages : 2164
Book Description
"This book set unites fundamental research on the history, current directions, and implications of gaming at individual and organizational levels, exploring all facets of game design and application and describing how this emerging discipline informs and is informed by society and culture"--Provided by publisher.
Author: Mahmoud Elkhodr Publisher: CRC Press ISBN: 1498783988 Category : Computers Languages : en Pages : 513
Book Description
Provides a comprehensive introduction to the latest research in networking Explores implementation issues and research challenges Focuses on applications and enabling technologies Covers wireless technologies, Big Data, IoT, and other emerging research areas Features contributions from worldwide experts
Author: Dimitar Georgiev Valchev
Author: Igor P. Kovalyov
Author: Claude Oestges
Author: Hao Jiang
Author: Alenka Zajić
Author: Kotsopoulos, Stavros
Author: Athanasios G. Kanatas
Author: Management Association, Information Resources
Author: Mahmoud Elkhodr
Author: Naveed Iqbal