Results 61 to 70 of about 462,203 (338)

Channel Estimation and User Localization for IRS-Assisted MIMO-OFDM Systems

IEEE Transactions on Wireless Communications, 2021
We consider the channel estimation problem and the channel-based wireless applications in multiple-input multiple-output orthogonal frequency division multiplexing systems assisted by intelligent reconfigurable surfaces (IRSs).
Yuxing Lin, Shi Jin, M. Matthaiou, X. You   +3 more
semanticscholar   +1 more source

Ravimite väljakirjutamise reeglid: põhjused ja tagajärjed [PDF]

, 2005
Artiklis on antud ülevaade ravimite väljakirjutamise erinevate viiside kasutamisest, nende võimalikest eelistest ja tagajärgedest ning selgitatud Eestis kehtivat retseptide väljakirjutamise korda.
Irs, Alar
core   +2 more sources

Intelligent Reflecting Surface (IRS)-Aided Covert Wireless Communications With Delay Constraint [PDF]

IEEE Transactions on Wireless Communications, 2020
This work examines the performance gain achieved by deploying an intelligent reflecting surface (IRS) in covert communications. To this end, we formulate the joint design of the transmit power and the IRS reflection coefficients by taking into account ...
Xiaobo Zhou, Shihao Yan, Qingqing Wu, F. Shu, Derrick Wing Kwan Ng   +4 more
semanticscholar   +1 more source

Max-Min Fairness in IRS-Aided Multi-Cell MISO Systems With Joint Transmit and Reflective Beamforming [PDF]

IEEE Transactions on Wireless Communications, 2020
This paper investigates an intelligent reflecting surface (IRS)-aided multi-cell multiple-input single-output (MISO) network with a set of multi-antenna base stations (BSs) each communicating with multiple single-antenna users, in which an IRS is ...
Hailiang Xie, Jie Xu, Ya-Feng Liu
semanticscholar   +1 more source

Let's Get Digital: Retrospective Digitization of ETDs for an Institutional Repository

Journal of Graduate Librarianship
Franklin University Library conducted a retrospective digitization project to make a collection of education master's theses available in its institutional repository.
Marc Jaffy
doaj   +1 more source

High-Resolution Continuum Imaging at 1.3 and 0.7 cm of the W3 IRS 5 Region

, 2003
High-resolution images of the hypercompact HII regions (HCHII) in W3 IRS 5 taken with the Very Large Array (VLA) at 1.3 and 0.7 cm are presented. Four HCHII regions were detected with sufficient signal-to-noise ratios to allow the determination of ...
Colley D., D. A. Boboltz, DePree C. G., Felli M., Helmich F. P., Megeath S. T., Mitchell G. F., Ossenkopf V., Panagia N., R. A. Gaume, S. T. Megeath, T. L. Wilson, Tieftrunk A. R., Tieftrunk A. R., Tieftrunk A. R., Wynn-Williams C. G.   +15 more
core   +1 more source

Spectral and Energy Efficiency of IRS-Assisted MISO Communication With Hardware Impairments [PDF]

IEEE Wireless Communications Letters, 2020
In this letter, we analyze the spectral and energy efficiency of an intelligent reflecting surface (IRS)-assisted multiple-input single-output (MISO) downlink system with hardware impairments.
Shaoqing Zhou, W. Xu, Kezhi Wang, M. Renzo, Mohamed-Slim Alouini   +4 more
semanticscholar   +1 more source

Tuning the Dielectric Properties of Individual Clay Nanosheets by Interlayer Composition: Toward Nano‐Electret Materials

Advanced Functional Materials, EarlyView.
The dielectric properties of clays are studied on the level of individual monolayers and functional double stacks. The material breakdown characteristics and charge storage performance are analyzed. For illustration, a defined charge pattern representing a cuneiform character is produced, written into a microscopic clay tile, referencing the origins of
Sebastian Gödrich, Paul Markus, Matthias Stöter, Bernhard Biersack, Rainer Schobert, Josef Breu, Georg Papastavrou   +6 more
wiley   +1 more source

Efficiency energy analysis for 6G communication systems using intelligent reflecting surface architecture

Радіоелектронні і комп'ютерні системи
The subject of this 6G communication system research is expected to form a hyper-connected network in which various electronic devices can connect continuously without interruption. Several technologies have been built to support 6G communication systems,
Hubbul Walidainy, Siti Raihan, Ramzi Adriman, Yuwaldi Away, Nasaruddin Nasaruddin   +4 more
doaj   +1 more source

Managing educational sector via self-evaluation policy. Haridussüsteemi juhtimine läbi sisehindamise

Eesti Majanduspoliitilised Väitlused, 2010
Performance evaluation is not a new concept in private sector, while in public sector organisations it has been taken into use since the implementation of performance management.
Kristi Ploom, Reelika Irs
doaj   +1 more source