Buscar
Mostrando ítems 41-50 de 79
Research on metamaterials for antenna applications
(2005)
Contribución a congreso / Biltzarrerako ekarpena,
During the last 20 years a lot of attention has been paid to apply Electromagnetic Band Gap (EBG) technology
in different frequency ranges, from microwaves to optics. EBG technology is based on the use of periodic structures ...
Enhanced radiation properties of a rectangular waveguide by means of a left handed media
(2005)
Contribución a congreso / Biltzarrerako ekarpena,
In this paper, the results of experimental investigations to improve the gain between two
antennas by means of a Left Handed Material (LHM) are presented. The basic idea is the use
of a LHM media acting as a resonator ...
Design of a multifrequency antenna array with the use of left-handed superstrates
(2005)
Contribución a congreso / Biltzarrerako ekarpena,
In this paper, the radiation performances of different antenna configuration
based on Left-Handed superstrates are presented. First of all, the behaviour of a Left-
Handed (LH) unit cell is analysed, showing a resonant ...
Design of low-cost smart accelerometers
(Universitat Politècnica de Catalunya, 2005)
Contribución a congreso / Biltzarrerako ekarpena,
The goal of this project is to design a low-cost smart accelerometer, making use of a piezoelectric
element as basic sensing material, and adding a
mixed-mode conditioning circuit.
Computation of greatest common divisor for the blind deconvolution of transient impulsive signals
(Universitat Politècnica de Catalunya, 2005)
Contribución a congreso / Biltzarrerako ekarpena,
We propose a new blind deconvolution method for transient impulsive signals in a single input
– multiple output (SIMO) system. The method
exploits the data redundancy inherent to SIMO
multichannel systems to obtain an ...
Multichannel blind deconvolution of impulsive signals
(2005)
Contribución a congreso / Biltzarrerako ekarpena,
In this communication, the problem of blind deconvolution of transient, impulsive signals in a multichannel environment
is addressed. This kind of signals arise naturally, or are used
as external excitation, in many ...
Glottal spectrum based inverse filtering
(ISCA, 2003)
Contribución a congreso / Biltzarrerako ekarpena,
In this paper a new inverse filtering technique for the time-domain estimation of the glottal excitation is presented. This approach uses the DAP modeling for the vocal tract characterization, and a spectral model for the ...
Analysis and synthesis of vibrato in lyric singers
(2002)
Contribución a congreso / Biltzarrerako ekarpena,
In this paper two aspects of the vibrato signal characterisation are
presented. First, an analysis method, which breaks down the musical
signal into its different partials, and decomposes them into two
separate ...
Unified analysis of glottal source spectrum
(ISCA, 2003)
Contribución a congreso / Biltzarrerako ekarpena,
The spectral study of the glottal excitation has traditionally
been based on a single time-domain mathematical model of
the signal, and the spectral dependence on its time domain
parameters. Opposite to this approach, ...
Two methods for nonparametric spectrum peak discrimination
(2002)
Contribución a congreso / Biltzarrerako ekarpena,
The conventional DFT-oriented nonparametric
interpolation methods, based on time windowing and the
DTFT envelope curve resampling (zero padding, Chirp-z
[1], frequency scale distortion [2], etc.), can improve the
spectrum ...