302 results in Catalog Computing
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1/4: How to make practical RIS techniques (and evaluate them)?
Online In Circuits & Devices, Fields, Waves & Electromagnetics, and 3 more (Show All)
Recently, reflecting intelligent surface (RIS) has been proposed as an innovative technology that can significantly improve the performance of wireless communication systems through the use of low-cost passive reflecting elements. There are two important issues to exploit the full benefit of RIS: 1) develop joint active beamforming (at the base station) and passive beamforming (at the RIS) techniques with high performance and low complexity, and 2) proper channel estimation techniques for RIS systems. Although effective in terms of performance, most of previous beamforming designs and channel estimation techniques for RIS systems have relied on complicated optimization methods, which are difficult to implement in practice. In this talk, I will first explain several practical channel estimation techniques with low training overhead for RIS systems. Then, I will explain low-complexity, non-iterative, and near-optimal RIS joint active and passive beamformer designs for both narrowband and wideband assuming full channel information. Lastly, I will introduce WiThRay, a versatile 3D wireless communication simulator based on ray-tracing developed by our lab, that can be used to evaluate different RIS techniques for various environments.Instructor:Junil ChoiPublication Date: 2022
English (United States)
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1/4: Non-Terrestrial Networks (NTN): Fundamentals, Standards, Performance, and Practice
Online In Transportation, Telecommunications, and 5 more (Show All)
The continuous evolution of 5G technology aims to improve performance and addresses new use cases. Enabling 5G system to support non-terrestrial networks (NTNs) has been one direction under exploration in 3GPP. NTN has become an umbrella term for any network that involves flying objects, including satellite communication networks, high altitude platform systems, and air-to-ground networks. The inherent flexibility of 5G technology provides a solid foundation for adapting it to support NTNs. However, NTNs are complex systems, the design of which requires a holistic approach. The objective of this tutorial is to offer a comprehensive learning experience about the state-of-the-art research and development in NTNs. We will describe the fundamentals of NTNs, explain in detail the design aspects, provide an overview of the latest standardization development of NTNs in 3GPP, share design rationales influencing standardization, presenting system performance evaluation methodology and the latest results, delivering practical, current information on the best industry practices, and pointing out fruitful avenues for future research.Instructors:Talha Ahmed KhanSebastian EulerJonas SedinPublication Date: 2022
English (United States)
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2/4: How to make practical RIS techniques (and evaluate them)?
Online In Circuits & Devices, Fields, Waves & Electromagnetics, and 3 more (Show All)
Recently, reflecting intelligent surface (RIS) has been proposed as an innovative technology that can significantly improve the performance of wireless communication systems through the use of low-cost passive reflecting elements. There are two important issues to exploit the full benefit of RIS: 1) develop joint active beamforming (at the base station) and passive beamforming (at the RIS) techniques with high performance and low complexity, and 2) proper channel estimation techniques for RIS systems. Although effective in terms of performance, most of previous beamforming designs and channel estimation techniques for RIS systems have relied on complicated optimization methods, which are difficult to implement in practice. In this talk, I will first explain several practical channel estimation techniques with low training overhead for RIS systems. Then, I will explain low-complexity, non-iterative, and near-optimal RIS joint active and passive beamformer designs for both narrowband and wideband assuming full channel information. Lastly, I will introduce WiThRay, a versatile 3D wireless communication simulator based on ray-tracing developed by our lab, that can be used to evaluate different RIS techniques for various environments.Instructor:Junil ChoiPublication Date: 2022
English (United States)
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2/4: Non-Terrestrial Networks (NTN): Fundamentals, Standards, Performance, and Practice
Online In Transportation, Telecommunications, and 5 more (Show All)
The continuous evolution of 5G technology aims to improve performance and addresses new use cases. Enabling 5G system to support non-terrestrial networks (NTNs) has been one direction under exploration in 3GPP. NTN has become an umbrella term for any network that involves flying objects, including satellite communication networks, high altitude platform systems, and air-to-ground networks. The inherent flexibility of 5G technology provides a solid foundation for adapting it to support NTNs. However, NTNs are complex systems, the design of which requires a holistic approach. The objective of this tutorial is to offer a comprehensive learning experience about the state-of-the-art research and development in NTNs. We will describe the fundamentals of NTNs, explain in detail the design aspects, provide an overview of the latest standardization development of NTNs in 3GPP, share design rationales influencing standardization, presenting system performance evaluation methodology and the latest results, delivering practical, current information on the best industry practices, and pointing out fruitful avenues for future research.Instructors:Talha Ahmed KhanSebastian EulerJonas SedinPublication Date: 2022
English (United States)
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3/4: How to make practical RIS techniques (and evaluate them)?
Online In Circuits & Devices, Fields, Waves & Electromagnetics, and 3 more (Show All)
Recently, reflecting intelligent surface (RIS) has been proposed as an innovative technology that can significantly improve the performance of wireless communication systems through the use of low-cost passive reflecting elements. There are two important issues to exploit the full benefit of RIS: 1) develop joint active beamforming (at the base station) and passive beamforming (at the RIS) techniques with high performance and low complexity, and 2) proper channel estimation techniques for RIS systems. Although effective in terms of performance, most of previous beamforming designs and channel estimation techniques for RIS systems have relied on complicated optimization methods, which are difficult to implement in practice. In this talk, I will first explain several practical channel estimation techniques with low training overhead for RIS systems. Then, I will explain low-complexity, non-iterative, and near-optimal RIS joint active and passive beamformer designs for both narrowband and wideband assuming full channel information. Lastly, I will introduce WiThRay, a versatile 3D wireless communication simulator based on ray-tracing developed by our lab, that can be used to evaluate different RIS techniques for various environments.Instructor:Junil ChoiPublication Date: 2022
English (United States)
-
3/4: Non-Terrestrial Networks (NTN): Fundamentals, Standards, Performance, and Practice
Online In Transportation, Telecommunications, and 5 more (Show All)
The continuous evolution of 5G technology aims to improve performance and addresses new use cases. Enabling 5G system to support non-terrestrial networks (NTNs) has been one direction under exploration in 3GPP. NTN has become an umbrella term for any network that involves flying objects, including satellite communication networks, high altitude platform systems, and air-to-ground networks. The inherent flexibility of 5G technology provides a solid foundation for adapting it to support NTNs. However, NTNs are complex systems, the design of which requires a holistic approach. The objective of this tutorial is to offer a comprehensive learning experience about the state-of-the-art research and development in NTNs. We will describe the fundamentals of NTNs, explain in detail the design aspects, provide an overview of the latest standardization development of NTNs in 3GPP, share design rationales influencing standardization, presenting system performance evaluation methodology and the latest results, delivering practical, current information on the best industry practices, and pointing out fruitful avenues for future research.Instructors:Talha Ahmed KhanSebastian EulerJonas SedinPublication Date: 2022
English (United States)
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3D Beamforming for UAV Communications
Online In Aerospace, Circuits & Devices, and 6 more (Show All)
This installment of the Webinar Series on Advanced Air Mobility is given by Sudharman Jayaweera, University of New Mexico & Bluecom Systems & Consulting LLC.Instructor:Sudharman JayaweeraPublication Date: 2024
English (United States)
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3D Placement & User Association for Load Balancing Among Aerial Base Stations
Online In Aerospace, Transportation, and 5 more (Show All)
This workshop focused on discussing the progress and continued endeavors on technology solutions pertaining to AIML-aided efficient spectrum utilization and dynamic adaptation for non-terrestrial coverage and connectivity.The next generation communication systems are expected to be predominantly machine-type and human-machine interface driven, while the infrastructures will be more mobile and adaptive. For all-pervasive sensing coverage and connectivity is expected to be fulfilled by the NTN infrastructure involving UAVs, UGVs, HAPs, and LEO satellite constellations. Fleeting yet intensive communication resource requirements in such communication applications demand that the spectrum resources also need to be adaptively utilized, with more flexibility and responsibility assigned to the communicating entities. To this end, the communication technologies, such as NOMA, SIC, distributed MIMO, OTFS are some of the enablers. Besides, the user environment being much dynamic, the power of AIML is expected to be an integral part in fulfilling such adaptive needs. Keeping the above factors in mind, in this call for workshop we would like to attract attention on smart spectrum-efficient and energy-sustainable NTN communication techniques for wireless applications. Besides theoretical research contributions, we will also look for technology viability and prototype development efforts for adaptive all-pervasive communications ranging from low-rate telemetry to highly reliable, ultra-low latency, and bandwidth intensive communications.Instructor:Ying Loong LeePublication Date: 2023
English (United States)
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4/4: How to make practical RIS techniques (and evaluate them)?
Online In Circuits & Devices, Fields, Waves & Electromagnetics, and 3 more (Show All)
Recently, reflecting intelligent surface (RIS) has been proposed as an innovative technology that can significantly improve the performance of wireless communication systems through the use of low-cost passive reflecting elements. There are two important issues to exploit the full benefit of RIS: 1) develop joint active beamforming (at the base station) and passive beamforming (at the RIS) techniques with high performance and low complexity, and 2) proper channel estimation techniques for RIS systems. Although effective in terms of performance, most of previous beamforming designs and channel estimation techniques for RIS systems have relied on complicated optimization methods, which are difficult to implement in practice. In this talk, I will first explain several practical channel estimation techniques with low training overhead for RIS systems. Then, I will explain low-complexity, non-iterative, and near-optimal RIS joint active and passive beamformer designs for both narrowband and wideband assuming full channel information. Lastly, I will introduce WiThRay, a versatile 3D wireless communication simulator based on ray-tracing developed by our lab, that can be used to evaluate different RIS techniques for various environments.Instructor:Junil ChoiPublication Date: 2022
English (United States)
-
4/4: Non-Terrestrial Networks (NTN): Fundamentals, Standards, Performance, and Practice
Online In Transportation, Telecommunications, and 5 more (Show All)
The continuous evolution of 5G technology aims to improve performance and addresses new use cases. Enabling 5G system to support non-terrestrial networks (NTNs) has been one direction under exploration in 3GPP. NTN has become an umbrella term for any network that involves flying objects, including satellite communication networks, high altitude platform systems, and air-to-ground networks. The inherent flexibility of 5G technology provides a solid foundation for adapting it to support NTNs. However, NTNs are complex systems, the design of which requires a holistic approach. The objective of this tutorial is to offer a comprehensive learning experience about the state-of-the-art research and development in NTNs. We will describe the fundamentals of NTNs, explain in detail the design aspects, provide an overview of the latest standardization development of NTNs in 3GPP, share design rationales influencing standardization, presenting system performance evaluation methodology and the latest results, delivering practical, current information on the best industry practices, and pointing out fruitful avenues for future research.Instructors:Talha Ahmed KhanSebastian EulerJonas SedinPublication Date: 2022
English (United States)
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