Results 21 to 30 of about 13,719,025 (270)
RR Lyrae Stars as Seen by the Kepler Space Telescope
Frontiers in Astronomy and Space Sciences, 2021 The unprecedented photometric precision along with the quasi-continuous sampling provided by the Kepler space telescope revealed new and unpredicted phenomena that reformed and invigorated RR Lyrae star research.
Emese Plachy +5 more
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Two-Stage Hierarchical Beam Training for Near-Field Communications [PDF]
IEEE Transactions on Vehicular Technology, 2023 Extremely large-scale array (XL-array) has emerged as a promising technology to improve the spectrum efficiency and spatial resolution of future wireless systems.
Chenyu Wu +4 more
semanticscholar +1 more source
Near-Field Channel Estimation for Extremely Large-Scale Reconfigurable Intelligent Surface (XL-RIS)-Aided Wideband mmWave Systems [PDF]
IEEE Journal on Selected Areas in Communications, 2023 Near-field communications present new opportunities over near-field channels, however, the spherical wavefront propagation makes near-field signal processing challenging.
Songjie Yang +5 more
semanticscholar +1 more source
Reconfigurable Intelligent Surface-Aided Near-Field Communications for 6G: Opportunities and Challenges [PDF]
IEEE Vehicular Technology Magazine, 2023 Reconfigurable intelligent surface (RIS)-aided near-field communications are investigated. First, the necessity of investigating RIS-aided near-field communications and the advantages brought about by the unique spherical wave-based near-field ...
Xidong Mu +3 more
semanticscholar +1 more source
Proceedings, 2023 Patients with type 2 diabetes mellitus (T2DM) may need proper counselling to bring about a real change in their lifestyle regarding a proper food intake, proper weight reduction, management of hemoglobin A1c (HbA1c), and commitment to intake drugs.
Sahar M. Abuhajar
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Near-Field Integrated Sensing and Communication: Opportunities and Challenges [PDF]
IEEE wireless communications, 2023 With the extremely large-scale array (XL-array) deployed in future wireless systems, wireless communication and sensing are expected to operate in the radiative near-field region, which needs to be characterized by the spherical rather than planar ...
Jiayi Cong +9 more
semanticscholar +1 more source
Near-field Communications: What Will Be Different? [PDF]
IEEE wireless communications, 2023 The design dilemma of “What will be different between near-field communications (NFC) and far-field communications (FFC)?” is addressed from four perspectives.
Yuanwei Liu +4 more
semanticscholar +1 more source
Micro Non-Uniform Linear Array (MNULA) for Ultrasound Plane Wave Imaging
Sensors, 2021 Ultrasound plane wave imaging technology has been applied to more clinical situations than ever before because of its rapid imaging speed and stable imaging quality.
Yujia Tang +5 more
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Physical Layer Security in Near-Field Communications [PDF]
IEEE Transactions on Vehicular Technology, 2023 A near-field secure transmission framework is proposed. Employing the hybrid beamforming architecture, a multi-antenna base station (BS) transmits confidential information to a multi-antenna legitimate user (U) against a multi-antenna internal ...
Zheng Zhang +4 more
semanticscholar +1 more source
Analysis of the Wireless Power Transfer System Using a Finite Grid of Planar Circular Coils
Energies, 2023 In this paper was analysed a wireless power transfer system (WPT) with multiple resonators supplying, for example, sensors or LED lighting. Energy is transferred simultaneously using a group of identical planar spiral circular coils acting as ...
Jacek Maciej Stankiewicz
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