Concept

Frequency-shift keying

Related publications (264)

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LDPC codes for Gaussian broadcast channels

Peter Allan Berlin, Daniela Tuninetti

We study coding over a class of two-user broadcast channels with additive white Gaussian noise and fading known at the receivers only. Joint decoding of low-density parity-check codes is analyzed. The message update rule at the mapping node linking the use ...

2004

A Rate-Adaptive MAC Protocol for Low-Power Ultra-Wide Band Ad-hoc Networks

Jean-Yves Le Boudec, Ruben Merz, Jörg Widmer

Recent theoretical results show that it is optimal to allow interfering sources to transmit simultaneously as long as they are outside a well-defined exclusion region around a destination and to adapt the rate to interference. In contrast, interference fro ...

2004

Apertureless SNOM

In this thesis a new scanning near field optical microscope based on an apertureless scattering technique is introduced for resolving optical properties of surfaces with lateral resolution reaching 10 nm and better. The construction of the instrument is ba ...

EPFL2004

A New Single-Phase Multilevel Modulator - A Fast and Accurate Method to Compute the Modulator Harmonic Spectra

Alfred Rufer

In the first part, a fast and accurate method to compute the harmonic spectra of PWM modulators is presented. This method allows to compute all measurements based on the harmonics values such as the THD or FWTHD. It is especially advantageous for multileve ...

2004

Optically addressing a large number of cantilevers

Jürgen Brugger, Marc Antonius Friedrich van den Boogaart

A heterodyne laser Doppler interferometer operating up to 100 MHz with an optical vibration excitation function was implemented to enable frequency detection of nanocantilevers. By using the stimulant of a network analyzer to sweep the modulation frequency ...

2003

Folded shift multiplexing

Demetri Psaltis, Wei Liu

Shift multiplexing is a holographic recording method that uses a spherical reference wave. We extend the principle to a thin slab of holographic material that acts as a waveguide. Total internal reflection folds the reference spherical beam in one dimensio ...

2003

Heteronuclear decoupling in NMR of Liquid Crystals using continuous phase modulation

David Lyndon Emsley

In this Letter we present a framework for the use of continuously phase modulated radio-frequency pulses for heteronuclear decoupling in NMR of Liquid Crystals. Within this framework, we found new sets of heteronuclear decoupling sequences using numerical ...

ELSEVIER SCIENCE BV2003

Mel-Cepstrum Modulation Spectrum (MCMS) Features for Robust ASR

Hervé Bourlard, Hemant Misra, Vivek Tyagi

In this paper, we present new dynamic features derived from the modulation spectrum of the cepstral traje ctories of the speech signal. Cepstral trajectories are projected over the basis of sines and cosines yie lding the cepstral modulation frequency resp ...

IDIAP2003

Mel-Cepstrum Modulation Spectrum (MCMS) Features for Robust ASR

Hervé Bourlard, Hemant Misra, Vivek Tyagi

2003

Wavelength modulation spectroscopy: combined frequency and intensity laser modulation

Luc Thévenaz, Philippe Robert

A theoretical model of wavelength modulation spectroscopy that uses a laser diode on a Lorentzian absorption line is presented. This theory describes the general case of a current-modulated semiconductor laser for which a combined intensity and frequency m ...

Optical Society of America2003