128 research outputs found

    Naval Postgraduate School Academic Catalog - February 2023

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    Spectrally and Energy Efficient Wireless Communications: Signal and System Design, Mathematical Modelling and Optimisation

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    This thesis explores engineering studies and designs aiming to meeting the requirements of enhancing capacity and energy efficiency for next generation communication networks. Challenges of spectrum scarcity and energy constraints are addressed and new technologies are proposed, analytically investigated and examined. The thesis commences by reviewing studies on spectrally and energy-efficient techniques, with a special focus on non-orthogonal multicarrier modulation, particularly spectrally efficient frequency division multiplexing (SEFDM). Rigorous theoretical and mathematical modelling studies of SEFDM are presented. Moreover, to address the potential application of SEFDM under the 5th generation new radio (5G NR) heterogeneous numerologies, simulation-based studies of SEFDM coexisting with orthogonal frequency division multiplexing (OFDM) are conducted. New signal formats and corresponding transceiver structure are designed, using a Hilbert transform filter pair for shaping pulses. Detailed modelling and numerical investigations show that the proposed signal doubles spectral efficiency without performance degradation, with studies of two signal formats; uncoded narrow-band internet of things (NB-IoT) signals and unframed turbo coded multi-carrier signals. The thesis also considers using constellation shaping techniques and SEFDM for capacity enhancement in 5G system. Probabilistic shaping for SEFDM is proposed and modelled to show both transmission energy reduction and bandwidth saving with advantageous flexibility for data rate adaptation. Expanding on constellation shaping to improve performance further, a comparative study of multidimensional modulation techniques is carried out. A four-dimensional signal, with better noise immunity is investigated, for which metaheuristic optimisation algorithms are studied, developed, and conducted to optimise bit-to-symbol mapping. Finally, a specially designed machine learning technique for signal and system design in physical layer communications is proposed, utilising the application of autoencoder-based end-to-end learning. Multidimensional signal modulation with multidimensional constellation shaping is proposed and optimised by using machine learning techniques, demonstrating significant improvement in spectral and energy efficiencies

    Комп’ютерне моделювання в наукоємних технологіях: збірник наукових праць міжнародної науково-технічної конференції (23-25 листопада 2022 р., м. Харків, Україна)

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    Для викладачів, наукових працівників, аспірантів, студентів вишів. Робочі мови конференції: українська, англійська.VIII Міжнародна науково-технічна конференція «Комп’ютерне моделювання в наукоємних технологіях» (КМНТ-2022) відбулася на базі Харківського національного університету імені В.Н.Каразіна 23-25 листопада 2022 року. Співорганізаторами цього наукового заходу виступили: ННЦ Харківський фізико-технічний інститут, MAX PLANCK INSTITUTE OF MICROSTRUCTURE PHYSICS, Київський національний університет імені Тараса ШЕВЧЕНКА, INSTITUTE OF NUCLEAR CHEMISTRY AND TECHNOLOGY (Warsaw, Poland), Рівненський державний гуманітарний університет, Національний аерокосмічний університет імені М. Є. Жуковського (ХАРКІВ), ЗАТ « Інститут інформаційних технологій » (Харків), Херсонський національний технічний університет, TEAM INTERNATIONAL SERVICES, INC. (Lake Mary, USA). Конференція проходила в онлайн режимі за наступними основними напрямками роботи: 1. Математичне моделювання технологічних процесів та приладів. 2. Моделювання інформаційних процесів у складних і розподілених системах. 3. Системи автоматизованого збору та когнітивного представлення наукових даних. 4. Моделювання фізичних процесів в радіаційних, плазмових та інших сучасних технологіях. 5. Безпека інформаційних систем і технологій. 6. Моделі процесів розробки та оцінки якості програмного забезпечення. Також було організовано загальну об’єднану секцію за всіма науковими напрямами конференції для студентів, аспірантів та молодих вчених, на якій молоді науковці мали змогу додатково доповісти результати своїх робіт. Метою цієї конференції було представлення та обговорення нових, оригінальних результатів досліджень українських та закордонних вчених у галузі математичного моделювання та обчислювальних методів, інформаційних технологій та захисту інформації. Крім того, конференція мала на меті організувати співпрацю науковців та студентів України та наших закордонних колег задля розвитку науки та освіти в Україні.The VIII International Scientific and Technical Conference "Computer modelling in high tech" (CMHT-2022) was held at V. N. Karazin Kharkiv National University on 23-25 November 2022. The co-organisers of this scientific event were: NSC Kharkiv Institute of Physics and Technology, MAX PLANCK INSTITUTE FOR MICROSTRUCTURE PHYSICS, Taras Shevchenko National University of Kyiv, INSTITUTE OF NUCLEAR CHEMISTRY AND TECHNOLOGY (Warsaw, Poland), Rivne State University of Humanities, National Aerospace University named after M.E. Zhukovsky (Kharkiv), CJSC "Institute of Information Technologies" (Kharkiv), Kherson National Technical University, TEAM INTERNATIONAL SERVICES, INC. (Lake Mary, USA). The conference was held online, the main themes being: 1. Mathematical modelling of technological processes and devices. 2. Modelling of information processes in complex and distributed systems. 3. Systems of the computer-aided acquisition and cognitive representation of the scientific data. 4. Modelling of physical processes in radiation, plasma and other modern technologies. 5. Security of information systems and technologies. 6. Models of software development and quality assessment. The joint section on all covered themes was organized for students, postgraduates and young scientists, where young scientists presented the results of their work. The purpose of this conference was to present and discuss results of new, original research of Ukrainian and foreign scientists in the field of mathematical modelling and computational methods, information technology and information security. In addition, the aim of conference was organizing the cooperation between Ukrainian scientists and students and our foreign colleagues to promote development of science and education in Ukraine

    5G Outlook – Innovations and Applications

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    5G Outlook - Innovations and Applications is a collection of the recent research and development in the area of the Fifth Generation Mobile Technology (5G), the future of wireless communications. Plenty of novel ideas and knowledge of the 5G are presented in this book as well as divers applications from health science to business modeling. The authors of different chapters contributed from various countries and organizations. The chapters have also been presented at the 5th IEEE 5G Summit held in Aalborg on July 1, 2016. The book starts with a comprehensive introduction on 5G and its need and requirement. Then millimeter waves as a promising spectrum to 5G technology is discussed. The book continues with the novel and inspiring ideas for the future wireless communication usage and network. Further, some technical issues in signal processing and network design for 5G are presented. Finally, the book ends up with different applications of 5G in distinct areas. Topics widely covered in this book are: • 5G technology from past to present to the future• Millimeter- waves and their characteristics• Signal processing and network design issues for 5G• Applications, business modeling and several novel ideas for the future of 5

    Swarm of UAVs for Network Management in 6G: A Technical Review

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    Fifth-generation (5G) cellular networks have led to the implementation of beyond 5G (B5G) networks, which are capable of incorporating autonomous services to swarm of unmanned aerial vehicles (UAVs). They provide capacity expansion strategies to address massive connectivity issues and guarantee ultra-high throughput and low latency, especially in extreme or emergency situations where network density, bandwidth, and traffic patterns fluctuate. On the one hand, 6G technology integrates AI/ML, IoT, and blockchain to establish ultra-reliable, intelligent, secure, and ubiquitous UAV networks. 6G networks, on the other hand, rely on new enabling technologies such as air interface and transmission technologies, as well as a unique network design, posing new challenges for the swarm of UAVs. Keeping these challenges in mind, this article focuses on the security and privacy, intelligence, and energy-efficiency issues faced by swarms of UAVs operating in 6G mobile networks. In this state-of-the-art review, we integrated blockchain and AI/ML with UAV networks utilizing the 6G ecosystem. The key findings are then presented, and potential research challenges are identified. We conclude the review by shedding light on future research in this emerging field of research.Comment: 19,

    Naval Postgraduate School Academic Catalog - September 2022

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    Cognitive Hyperconnected Digital Transformation

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    Cognitive Hyperconnected Digital Transformation provides an overview of the current Internet of Things (IoT) landscape, ranging from research, innovation and development priorities to enabling technologies in a global context. It is intended as a standalone book in a series that covers the Internet of Things activities of the IERC-Internet of Things European Research Cluster, including both research and technological innovation, validation and deployment. The book builds on the ideas put forward by the European Research Cluster, the IoT European Platform Initiative (IoT-EPI) and the IoT European Large-Scale Pilots Programme, presenting global views and state-of-the-art results regarding the challenges facing IoT research, innovation, development and deployment in the next years. Hyperconnected environments integrating industrial/business/consumer IoT technologies and applications require new IoT open systems architectures integrated with network architecture (a knowledge-centric network for IoT), IoT system design and open, horizontal and interoperable platforms managing things that are digital, automated and connected and that function in real-time with remote access and control based on Internet-enabled tools. The IoT is bridging the physical world with the virtual world by combining augmented reality (AR), virtual reality (VR), machine learning and artificial intelligence (AI) to support the physical-digital integrations in the Internet of mobile things based on sensors/actuators, communication, analytics technologies, cyber-physical systems, software, cognitive systems and IoT platforms with multiple functionalities. These IoT systems have the potential to understand, learn, predict, adapt and operate autonomously. They can change future behaviour, while the combination of extensive parallel processing power, advanced algorithms and data sets feed the cognitive algorithms that allow the IoT systems to develop new services and propose new solutions. IoT technologies are moving into the industrial space and enhancing traditional industrial platforms with solutions that break free of device-, operating system- and protocol-dependency. Secure edge computing solutions replace local networks, web services replace software, and devices with networked programmable logic controllers (NPLCs) based on Internet protocols replace devices that use proprietary protocols. Information captured by edge devices on the factory floor is secure and accessible from any location in real time, opening the communication gateway both vertically (connecting machines across the factory and enabling the instant availability of data to stakeholders within operational silos) and horizontally (with one framework for the entire supply chain, across departments, business units, global factory locations and other markets). End-to-end security and privacy solutions in IoT space require agile, context-aware and scalable components with mechanisms that are both fluid and adaptive. The convergence of IT (information technology) and OT (operational technology) makes security and privacy by default a new important element where security is addressed at the architecture level, across applications and domains, using multi-layered distributed security measures. Blockchain is transforming industry operating models by adding trust to untrusted environments, providing distributed security mechanisms and transparent access to the information in the chain. Digital technology platforms are evolving, with IoT platforms integrating complex information systems, customer experience, analytics and intelligence to enable new capabilities and business models for digital business

    Naval Postgraduate School Academic Catalog - 09 July 2021

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    Recent Advances in Wireless Communications and Networks

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    This book focuses on the current hottest issues from the lowest layers to the upper layers of wireless communication networks and provides "real-time" research progress on these issues. The authors have made every effort to systematically organize the information on these topics to make it easily accessible to readers of any level. This book also maintains the balance between current research results and their theoretical support. In this book, a variety of novel techniques in wireless communications and networks are investigated. The authors attempt to present these topics in detail. Insightful and reader-friendly descriptions are presented to nourish readers of any level, from practicing and knowledgeable communication engineers to beginning or professional researchers. All interested readers can easily find noteworthy materials in much greater detail than in previous publications and in the references cited in these chapters

    Naval Postgraduate School Academic Catalog - September 2021

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