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A Survey on Millimeter-Wave Beamforming Enabled UAV Communications and Networking
[article]
2021
arXiv
pre-print
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The utilization of the millimeter-wave (mmWave) frequency bands is a promising direction for UAV communications, where large antenna arrays can be packed in a small area on the UAV to perform three-dimensional ...
On the other hand, UAVs serving as aerial access points or relays can significantly enhance the coverage and quality of service of the terrestrial mmWave cellular networks. ...
PERFORMANCE ANALYSIS BASICS To unveil the potentials of mmWave-UAV communications, system-level and network-level performance analysis has to be conducted. ...
arXiv:2104.09204v2
fatcat:rbywt5p7uzhhzg3hbc7tnln45q
Machine Learning Empowered Beam Management for Intelligent Reflecting Surface Assisted MmWave Networks
[article]
2020
arXiv
pre-print
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However, the coexistence of IRSs and mmWave BSs complicates the network architecture, and thus poses great challenges for efficient beam management (BM) that is one critical prerequisite for high performance ...
In this paper, we systematically evaluate the key issues and challenges of BM for IRS-assisted mmWave networks to bring insights into the future network design. ...
cellular systems. ...
arXiv:2003.01306v1
fatcat:4lb75wba5bf4bgcq5euzbaa6oa
Intelligent Reflecting Surfaces Assisted UAV Communications for Massive Networks: Current Trends, Challenges, and Research Directions
2022
Sensors
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Finally, we shed some light on open challenges and future research directions for IRS-assisted UAV communication. ...
This study briefly discusses IRS-assisted UAV communications. We survey the existing literature on this emerging research topic for both ground and airborne scenarios. ...
The deployment of optimal relay is a problem in FSO systems, which causes hindrance in tracking and acquisition of optical beams. ...
doi:10.3390/s22145278
pmid:35890955
pmcid:PMC9322292
fatcat:hesqzgn2u5defolpwzkmf3brcu
Enabling Smart Reflection in Integrated Air-Ground Wireless Network: IRS Meets UAV
[article]
2021
arXiv
pre-print
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2021 pre-print arXiv:2103.07151v1 fatcat:kitrt2hcybaotoqjhlfcploisa
Specifically, terrestrial IRS is used to enhance the UAV-ground communication performance, while UAV-mounted IRS is employed to assist in the terrestrial communication. ...
Intelligent reflecting surface (IRS) and unmanned aerial vehicle (UAV) have emerged as two promising technologies to boost the performance of wireless communication networks, by proactively altering the ...
To overcome the above drawbacks of UAVs, a promising solution is by deploying terrestrial IRSs in the UAV-ground communication system to improve its performance, leading to the new technique of IRS-assisted ...
arXiv:2103.07151v2
fatcat:rba5mbp3tvecpamcmiuupk5jqe
Intelligent-Reflecting-Surface-Assisted UAV Communications for 6G Networks
[article]
2023
arXiv
pre-print
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First, primary issues, key technologies, and application scenarios of IRS-assisted UAV communications for 6G networks are introduced. ...
In this article, we conduct a comprehensive survey on IRS-assisted UAV communications for 6G networks. ...
the received reward [48] . b) Beam tracking: For dynamic beamforming, fastchanging channels and hardware/resource limitations hinder the implementation of beam tracking. ...
arXiv:2310.20242v1
fatcat:favprbezjvgezlkyvvvhg3ofzy
Mid-infrared Chemical Imaging of Intracellular Tau Fibrils using Fluorescence-guided Computational Photothermal Microscopy
[article]
2023
arXiv
pre-print
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Depth-resolved mid-infrared fingerprint spectroscopy is performed to reveal the protein secondary structure of the intracellular tau fibrils. 3D visualization of the e̱ṯa̱-sheet for tau fibril structure ...
Based on a low-cost and simple optical design, FBS-IDT enables chemical-specific volumetric imaging and 3D site-specific mid-IR fingerprint spectroscopic analysis of tau fibrils, an important type of amyloid ...
Hongjian He for helpful discussions in protein secondary structure analysis. ...
arXiv:2302.11769v1
fatcat:ayfinlgq6rcu3kltwsoysk3taa
Intelligent Reflecting Surface Assisted Localization: Opportunities and Challenges
2022
Electronics
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The advancement of signal processing techniques and communication technologies enables the path for improving localization performance. ...
Over the past few years, the performance of IRS-assisted networks is extensively investigated from the point of view of communication purposes and its improvement. ...
Therefore, exploration of multiple-antenna nodes, spatial scattering modulation, beam index modulation, resource allocation, understanding and analysis of correlated channels, and system performance analysis ...
doi:10.3390/electronics11091411
doaj:058f1462e42c45e6b103883b19dcb5c9
fatcat:yrx2hrdgfzawtaouni2zm3wnbi
IRS-aided UAV for Future Wireless Communications: A Survey and Research Opportunities
[article]
2022
arXiv
pre-print
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The IRS-aided UAV communication, which introduces IRSs into UAV communications, has emerged in an effort to improve the system performance while also overcoming UAV communication constraints and issues ...
The technological features of the most recent relevant researches on IRS-aided UAV communications from the perspective of the main performance criteria, i.e., energy efficiency, security, spectral efficiency ...
The fact that IRS-assisted UAV communications systems frequently entail a wide range of factors highlights how crucial it is to optimize them to increase system performance. ...
arXiv:2212.06015v1
fatcat:p6akw3vgr5eydo35hyakdnwuny
2021 Index IEEE Transactions on Wireless Communications Vol. 20
2021
IEEE Transactions on Wireless Communications
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The Author Index contains the primary entry for each item, listed under the first author's name. ...
The primary entry includes the coauthors' names, the title of the paper or other item, and its location, specified by the publication abbreviation, year, month, and inclusive pagination. ...
., +, TWC Dec. 2021 8381-8392 Wideband Channel Estimation for IRS-Aided Systems in the Face of Beam Squint. ...
doi:10.1109/twc.2021.3135649
fatcat:bgd3vzb7pbee7jp75dnbucihmq
Threats from and Countermeasures for Unmanned Aerial and Underwater Vehicles
2022
Sensors
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We also overview the countermeasures against such threats, including approaches for the detection, tracking, and classification of UAVs and UUVs. ...
However, the small size and the ability to fly close to the terrain make the detection and tracking of UAVs challenging. ...
Acknowledgments: We would like to thank Matins Ezuma for his contribution toward UAV detection and classification using RF analysis. ...
doi:10.3390/s22103896
pmid:35632303
pmcid:PMC9143730
fatcat:3i7aer6jrvhebeflitgceqvw4q
Fabrication of a Multiple Heater-Sensor Platform for Cell Temperature Monitoring
2020
2020 Symposium on Design, Test, Integration & Packaging of MEMS and MOEMS (DTIP)
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Lensfree optical imaging is performed while the system is regulating at 37 °C and 100 µm diameter micro particles can be detected on the surface. ...
The four heater-sensor platform is fabricated using microfabrication techniques followed by an electrical characterization. The nominal set of parameters is determined. ...
ACKNOWLEDGMENT The authors would like to thank the technical staff of PTA, Upstream Technological Platform, for their assistance during the microfabrication process. ...
doi:10.1109/dtip51112.2020.9139132
fatcat:6hpyedq5h5ftlli3ukz4jyjkbu
A Survey of Beam Management for mmWave and THz Communications Towards 6G
[article]
2023
arXiv
pre-print
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Beam management, namely initial access and beam tracking, has been recognized as an essential technique to ensure robust mmWave/THz communications, especially for mobile scenarios. ...
The introduction of these enabling technologies presents both open opportunities and unique challenges for beam management. ...
A general beam training and tracking technique for RIS-assisted mmWave/THz communications is to perform beam sweeping based on predesigned active/passive beamforming codebooks [166] - [173] . ...
arXiv:2308.02135v1
fatcat:snpjzjgdfbekjd463ew735uuvq
Deep optical neural network by living tumour brain cells
[article]
2018
arXiv
pre-print
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Our random and hybrid photonic/living system is a novel artificial machine for computing and for the real-time investigation of tumour dynamics. ...
The new era of artificial intelligence demands large-scale ultrafast hardware for machine learning. ...
Acknowledgments We thank MD Deen Islam for the assistance in the laboratory. We acknowledge support from the QuantERA ERA-NET Co-fund 731373 (Project QUOMPLEX) and Sapienza Ateneo 2016 and 2017. ...
arXiv:1812.09311v1
fatcat:jecpdwspqnfmvdpxy6xidpsdx4
Guest Editorial Special Issue on "THz Communications and Networking"
2021
IEEE Journal on Selected Areas in Communications
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In the article titled "Wideband beam tracking in THz massive MIMO systems," the authors propose a beam zooming based beam tracking for Terahertz massive MIMO, which exhibits severe beam squint phenomenon ...
and analysis of high-performance schemes for transmission and networking for various applications of THz communications. ...
doi:10.1109/jsac.2021.3071914
fatcat:ly6hsf4ui5b33fnfcadvitxi2a
Applications of Intelligent Radio Technologies in Unlicensed Cellular Networks - A Survey
2021
KSII Transactions on Internet and Information Systems
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Generally speaking, ML techniques are used in IR based on statistical models established for solving specific optimization problems. ...
We will also discuss some open issues and challenges for future research on the IR applications in unlicensed cellular networks. ...
systems to optimize the performance of an unlicensed cellular system. ...
doi:10.3837/tiis.2021.07.020
fatcat:uzb3gqtsezcgzehvjige3vgiwq
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