Concept

Modulation d'amplitude en quadrature

Publications associées (246)

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A Note on the Fairness of TCP Vegas

Jean-Yves Le Boudec, Catherine Boutremans

We study the fairness of TCP Vegas. The latter is an alternative to the commonly used TCP Reno, and uses measures of the round trip time as feedback on congestion. We consider two cases that depend on the value of the two parameters alpha and beta controll ...

2000

Instrumentation for real-time fluorescence lifetime imaging in endoscopy

Hubert van den Bergh, Georges Wagnières, André Studzinski, Thomas Stepinac

The fluorescence lifetime of living tissues is, in certain cases, related to their pathol. state and is therefore of interest for cancer detection. Measuring fluorescence lifetime in vivo during an endoscopic examn. has thus been a challenging objective fo ...

1999

DC-DC Converters for Two-Quadrant Operation with Controlled Output Voltage

A DC-DC converter is proposed with new modulation schemes for a voltage-controlled output. The DC-DC converter is designed for a reversible current in order to feed DC current motors or four quadrant converters, which need a galvanic separation from a DC s ...

1999

A Note on the Fairness of TCP Vegas

Jean-Yves Le Boudec, Catherine Boutremans

\alpha

and

\beta

co ...

1999

Pulsed fiber laser using micro-electro-mechanical mirrors

Nico de Rooij, Hans Peter Herzig, René Dändliker

Two different types of micromirrors are integrated with a fiber laser to modulate the cavity Q-factor. Both systems operate at frequencies up to 60 kHz and generate a pulse peak power 100 times higher than the continuous emission. We simulate the emitted p ...

1999

Degradation of asymmetrical Pt/SRO/PLZT/Pt capacitors: Role of Pt and oxide electrodes

Nava Setter, Alexander Tagantsev, Igor Stolichnov

Role of Pt and SRO electrodes in polarization fatigue of PLZT film ferroelectric capacitors is studied. We show that asymmetrical Pt/SRO/PLZT/Pt structure exhibits unusual dependence of the endurance of switching polarization on the driving ac electric fie ...

1999

Analogue VLSI building blocks for an electronic auditory pathway

This thesis gives an overview of my work over the last four years on the development of analogue electronic building blocks for the auditory pathway, and their application to some models of processing in the auditory brainstem. The anatomy and physiology o ...

EPFL1998

Investigation of two-layered turbid media with time-resolved reflectance

Hubert van den Bergh, Georges Wagnières

Light propagation in 2-layered turbid media that have an infinitely thick 2nd layer is studied with time-resolved reflectance. The authors used a soln. of the diffusion equation for this geometry to show that it is possible to derive the absorption and the ...

1998

Inter-pixel grating noise in holographic memories

Demetri Psaltis

We have experimentally discovered that the Signal-to-Noise Ratio (SNR) of holograms initially remains constant as the number of holograms stored increases and drops significantly only after a large number of holograms are recorded. This suggests that in a ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa1998

Selective cross-polarization in solution state NMR

Geoffrey Bodenhausen

In two influential paper, Ernst and coworkers argued that cross-polarization, originally proposed by Hartmann and Hahn, can be very useful in isotropic liqs. to transfer coherence between scalar-coupled nuclei such as protons and carbon-13 (Maudsley, A. A. ...

1998

A Note on the Fairness of TCP Vegas

Jean-Yves Le Boudec, Catherine Boutremans

\alpha

and

\beta

co ...

1999