Publications associées à Modulation par déplacement de fréquence

Microwave phase shifters based on sol-gel derived Ba0.3Sr0.7TiO3 ferroelectric thin films

In this paper, we report on the performance of microwave phase shifters implemented on sol-gel derived Ba0.3Sr0.7TiO3 (BST) thin films. Coplanar waveguide (CPW) phase shifters, loaded-line phase shifters, and reflection-type digital phase shifters have bee ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2007

Circular Hall transducer for angular position sensing

Radivoje Popovic, Pavel Kejik

We developed a new integrated magnetic sensor based on the Hall effect, suitable for contactless 360 degrees absolute angle encoding. The sensing device consists of a narrow n-well ring with a chain of 64 contacts equally distributed along the ring. It is ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2007

Non-Uniform Speech/Audio Coding Exploiting Predictability of Temporal Evolution of Spectral Envelopes

Petr Motlicek, Hynek Hermansky, Sriram Ganapathy

Unlike classical state-of-the-art coders that are based on short-term spectra, our approach uses relatively long temporal segments of audio signal in critical-band-sized sub-bands. We apply auto-regressive model to approximate Hilbert envelopes in frequenc ...

2007

Analysis of UWB antennas for carrier-based UWB impulse radio

Anja Skrivervik, Gabriela Quintero Diaz De Leon

A Carrier-based UWB pulse is compared with the commonly used Gaussian pulse. Two antenna systems are simulated and measured in frequency domain. The impulse response and the Power Spectral Density (PSD) of both studied pulses are obtained. The effect of ea ...

2007

Complex unltrahigh resolution Fourier domain optical coherence tomography

Theo Lasser, Rainer Leitgeb, Adrian Bachmann

Fourier domain optical coherence tomography (FDOCT) is a high speed imaging technique with high axial resolution in the micro-meter-scale range combined with a high sensitivity allowing to probe 3D volumes of weakly back- scattering biological tissues in-v ...

SPIE2006

Phase sensitive Fourier domain optical coherence tomography

Theo Lasser, Rainer Leitgeb, Adrian Bachmann

Optical Coherence Tomography (OCT) is an imaging technique with high axial resolution in the micro-meter-scale range combined with a high sensitivity allowing for example to probe weakly back-scattering structures beneath the surface of biological tissues ...

2006

CAVITATION MONITORING OF HYDROTURBINES: TESTS IN A FRANCIS TURBINE MODEL

Mohamed Farhat, Philippe Ausoni, Eduard Egusquiza

A series of tests have been put into effect in a laboratory to improve the cavitation monitoring techniques. Simultaneous vibrations and dynamic pressures have been measured in a reduced scale Francis turbine model with different types of cavitation: weak ...

2006

An Architecture for Wireless Simulation in NS-2 Applied to Impulse-Radio Ultra-Wide Band Networks

Jean-Yves Le Boudec, Ruben Merz, Jörg Widmer

We present an architecture for implementing a wireless physical layer in a packet-based network simulator. We have integrated this architecture in the popular ns-2 network simulator and used it to implement an impulse-radio ultra-wide band (IR-UWB) physica ...

2006

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Modulation par déplacement de fréquence

Microwave phase shifters based on sol-gel derived Ba0.3Sr0.7TiO3 ferroelectric thin films

Circular Hall transducer for angular position sensing

Non-Uniform Speech/Audio Coding Exploiting Predictability of Temporal Evolution of Spectral Envelopes

Broadcast, relay and feedback in Gaussian channels

Analysis of UWB antennas for carrier-based UWB impulse radio

Complex unltrahigh resolution Fourier domain optical coherence tomography

Phase sensitive Fourier domain optical coherence tomography

Novel concepts in phase shifting interferometry and their applications to holographic moiré

CAVITATION MONITORING OF HYDROTURBINES: TESTS IN A FRANCIS TURBINE MODEL

An Architecture for Wireless Simulation in NS-2 Applied to Impulse-Radio Ultra-Wide Band Networks

Graph Chatbot

Chattez avec Graph Search

An Architecture for Wireless Simulation in NS-2 Applied to Impulse-Radio Ultra-Wide Band Networks

Microwave phase shifters based on sol-gel derived Ba0.3Sr0.7TiO3 ferroelectric thin films

Broadcast, relay and feedback in Gaussian channels

Complex unltrahigh resolution Fourier domain optical coherence tomography

Non-Uniform Speech/Audio Coding Exploiting Predictability of Temporal Evolution of Spectral Envelopes

Phase sensitive Fourier domain optical coherence tomography

Novel concepts in phase shifting interferometry and their applications to holographic moiré

CAVITATION MONITORING OF HYDROTURBINES: TESTS IN A FRANCIS TURBINE MODEL

Analysis of UWB antennas for carrier-based UWB impulse radio

Circular Hall transducer for angular position sensing