Concept

Demodulation

Publications associées (57)

An Efficient Carrier Phase Synchronization Technique for High-Order M-QAM–OFDM

In this correspondence, we propose a blind carrier phase synchronization algorithm for high-order M-ary quadrature amplitude modulation-orthogonal frequency division multiplexing (M-QAM-OFDM) systems, which can effectively recover residual frequency offset ...

IEEE2008

Performance Evaluation of an IEEE 802.15.4a Physical Layer with Energy Detection and Multi-User Interference

Jean-Yves Le Boudec, Ruben Merz, Manuel Flury

We evaluate the performance of an IEEE 802.15.4a ultra-wide band (UWB) physical layer, with an energy-detection receiver, in the presence of multi-user interference (MUI). A complete packet based system is considered. We take into account packet detection ...

2007

Detection of cavitation in hydraulic turbines

François Avellan, Mohamed Farhat, Eduard Egusquiza

An experimental investigation has been carried out in order to evaluate the detection of cavitation in actual hydraulic turbines. The methodology is based on the analysis of structural vibrations, acoustic emissions and hydrodynamic pressures measured in t ...

2006

Novel speech processing techniques for robust automatic speech recognition

Vivek Tyagi

The goal of this thesis is to develop and design new feature representations that can improve the automatic speech recognition (ASR) performance in clean as well noisy conditions. One of the main shortcomings of the fixed scale (typically 20-30 ms long ana ...

EPFL2006

Chauffage de plasma par ondes électromagnétiques à la troisième harmonique de la fréquence cyclotron des électrons dans le tokamak TCV

Gilles Arnoux

The Tokamak à Configuration Variable (TCV) programme is based on flexible plasma shaping capabilities together with a powerful electron cyclotron wave (ECW) additional heating for studies of stability, confinement, transport, control and power exhaust. In ...

EPFL2005

Third-harmonic, top-launch, ECRH experiments on TCV tokamak

Yves Martin, Stefano Alberti, Jean-Philippe Hogge, Laurie Porte, Philippe Marmillod, Gilles Arnoux, Blaise Marlétaz

In the moderate magnetic field of TCV (1.5 T), the recently installed X3 system (3 gyrotrons, 118 GHz, 0.45 MW each, 2 s) broadens the operational space with the possibility of heating plasmas at high density, well above the cutoff density of the X2 system ...

2005

Performance of MIMO-extended UMTS-FDD downlink comparing space-time RAKE and linear equalizer

Andreas Peter Burg

The paper discusses the performance of a MIMO-extended UMTS-FDD downlink with a 2x2 and a 4x4 antenna configuration. An analytical expression for the average signal to interference ratio (SIR) of a space-time (ST) RAKE receiver in an interference dominated ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2004

Adaptive MIMO OFDM Receivers: Implementation Impairments and Complexity Issues

Ali H. Sayed

MIMO OFDM communications is a promising choice for future high data rate wireless systems. However, the commercial deployment of MIMO OFDM systems faces some challenges, including those arising from front-end analog implementation impairments and complex ...

2004

Measurement of dynamic deformations using a path unbalance Michelson interferometer based optical fiber sensing device

Luc Thévenaz, Pramod Rastogi

A novel demodulation technique for performing dynamic deformation measurements using a path-unbalanced Michelson interferometer is reported, The method is based on the rf amplitude modulation of a low-coherence source, and demodulation Is achieved by track ...

2003

High-speed femtosecond pump probe spectroscopy with a smart pixel detector array

René Salathé, Theo Lasser, Stéphane Bourquin

A new femtosecond pump-probe spectroscopy technique is demonstrated that permits the high-speed, parallel acquisition of pump-probe measurements at multiple wavelengths. This is made possible by use of a novel, two-dimensional smart pixel detector array th ...

2003

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