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Affichage de 7181 à 7190 sur 16231

Article dans une revue

Modulation recognition for MIMO relaying broadcast channels with direct link

Wassim Ben Chikha, Iyad Dayoub, Walaa Hamouda, Rabah Attia

In this letter, we investigate the performance of modulation identification based on pattern recognition approach using the decision tree (J48) classifier, for multiple-inputmultipleoutput (MIMO) relaying broadcast channels with direct link (source-to-destination). The proposed system identifies…

IEEE Wireless Communications Letters, 2014, 3 (1), pp.50-53. ⟨10.1109/WCL.2013.111113.130655⟩. ⟨hal-00954477⟩

Article dans une revue

Performance analysis of antenna arrays in tunnel environment

M. Lienard, C. Sanchis-Borras, J. Molina-Garcia-Pardo, D. Gaillot, Pierre Laly, Pierre Degauque

Previous works have shown that multiple-input-multiple- output techniques such as space-time block code applied to tunnel environments present better performances than a single-input-single-output transmission, despite the small angular spread of the rays in this environment. Nevertheless, taking…

IEEE Antennas and Wireless Propagation Letters, 2014, 13, pp.122-125. ⟨10.1109/LAWP.2013.2297174⟩. ⟨hal-00939055⟩

Article dans une revue

Confinement-modulated junctionless nanowire transistors for logic circuits

François Vaurette, Renaud Leturcq, Sylvie Lepilliet, Bruno Grandidier, Didier Stiévenard

We report the controlled formation of nanoscale constrictions in junctionless nanowire field-effect transistors that efficiently modulate the flow of the current in the nanowire. The constrictions act as potential barriers and the height of the barriers can be selectively tuned by gates, making the…

Nanoscale, 2014, 6 (22), pp.13446-13450. ⟨10.1039/c4nr04047c⟩. ⟨hal-04614113⟩

Communication dans un congrès

200 GHz coherent wireless link using photonics-based emission

Guillaume Ducournau, Y. Yoshimizu, S. Hisatake, F. Pavanello, Emilien Peytavit, Mohammed Zaknoune, T. Nagatsuma, Jean-Francois Lampin

We investigated a coherent THz link at 200 GHz, with variable data rate up to 11 Gbit/s, featuring the combination of a quasi-optic UTC-PD emitter and a high sensitivity electronic receiver. This coherent link relies on an optical frequency comb generator at emission to produce an optical beat note…

39th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), Sep 2014, Tucson, United States. ⟨10.1109/IRMMW-THz.2014.6956001⟩. ⟨hal-03286172⟩

Communication dans un congrès

Conception d'un réseau de capteurs acoustiques passifs pour un contrôle-santé intégré basse consommation et non-intrusif des structures aéronautiques et conduites de transport de fluides

Karl Hourany, Farouk Benmeddour, Emmanuel Moulin, Youssef Zaatar, Jamal Assaad

La corrélation d'un champ acoustique permet de caractériser un milieu de façon passive, cette étude a commencé à se développer depuis plusieurs années dans différentes applications de contrôle santé intégré (CSI). Une brève explication d'une étude faite précédemment pour la détection des…

Lebanese Association for the Advancement of Science 20th International Science Conference, LAAS 20, 2014, Hadath, Liban. Poster session 1 : Theoretical and Experimental Chemistry and Physics I, 297-298. ⟨hal-00974480⟩

Article dans une revue

Train accurate localization using ultra wide band radio and time reversal

Bouna Fall, Fouzia Elbahhar, Marc Heddebaut, Atika Rivenq

In guided transport, the precise localization of trains is vital for nominal operation of the transport system. In a propagation environment such as a railway line, an effective localization sensor is complex to design since it must operate in the presence of many fixed and mobile obstacles…

International Journal of Engineering and Innovative Technology, 2014, 3 (Issue 12), p234-244. ⟨hal-01068479⟩

Article dans une revue

Terahertz time-domain spectroscopy of absorbing materials and of metamaterials

Jean-Louis Coutaz, M. Bernier, Frédéric Garet, S. Joly, Y. Miyake, H. Minamide, Eric Lheurette, Didier Lippens

This paper gives a review of recent works we performed in view of characterizing natural materials and metamaterials by terahertz time-domain spectroscopy. We address materials that exhibit a low transmittance in given narrow spectral bands or over the whole experimental spectral window. We give…

Terahertz Science and Technology, 2014, 7, pp.53-69. ⟨10.11906/TST.053-069.2014.06.05⟩. ⟨hal-01020491⟩

Article dans une revue

Dirac cones, topological edge states, and nontrivial flat bands in two-dimensional semiconductors with a honeycomb nanogeometry

Efterpi Kalesaki, Christophe Delerue, Cristiane Morais Smith, Wouter Beugeling, Guy Allan, Daniel Vanmaekelbergh

We study theoretically two-dimensional single-crystalline sheets of semiconductors that form a honeycomb lattice with a period below 10 nm. These systems could combine the usual semiconductor properties with Dirac bands. Using atomistic tight-binding calculations, we show that both the atomic…

Physical Review X, 2014, 4 (1), pp.0110101. ⟨10.1103/PhysRevX.4.011010⟩. ⟨hal-00939871⟩

Communication dans un congrès

Deformation of droplets with magnetic nanoparticles in a rotating magnetic field

Sergey S. Koshelyuk, Yu V. Pylnov, Vladimir L. Preobrazhensky, Philippe Pernod

This paper investigates the change in contact angle of droplets of fluid containing dispersed nanoparticles (nanofluid) stabilized in oleic acid and ethanol placed in a rotating magnetic field. Paramagnetic nanoparticles with an average size 100 nm were injected into the droplets and situated on…

17èmes Journées Nationales du Réseau Doctoral en Micro-Nanoélectronique, JNRDM 2014, 2014, Villeneuve d'Ascq, France. 3 p. ⟨hal-01020263⟩

Communication dans un congrès

Silicon pillars as resonators in an acoustical metamaterial

B. Bonello, R. Marchal, R. Moiseyenko, Yan Pennec, Bahram Djafari-Rouhani, J. Zhao, O. Boyko

We have investigated the propagation of Lamb waves in structures made of either an isolated resonant pillar or a set of pillars arranged in a line on a thin plate. The resonators as well as the plate are made of silicon. FEM computations show that two bending modes and one compressional mode are…

ASME 2014 International Mechanical Engineering Congress and Exposition, IMECE 2014, Nov 2014, Montreal, Canada. ⟨10.1115/IMECE2014-37914⟩. ⟨hal-03508193⟩