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Carrier Frequency Offset Compensation for OFDMA Systems Using Circular Banded Matrices
(Planta Piloto de Ingeniería Química, 2013-07)
Orthogonal frequency division multiple access (OFDMA) is a multiuser communication technique that allocates to each user a set of orthogonal carriers. In the presence of carrier frequency offset (CFO) the orthogonality ...
On confidence bands for time series problems in the time and frequency domains
(Institute of Mathematical Statistics, 2003-12)
The construction of (asymptotic) simultaneous confidence bands for some time series problems is studied, typically for the sample autocorrelogram and windowed spectral density estimate. The following approaches are explored: ...
A penalized time-frequency band feature selection and classification procedure for improved motor intention decoding in multichannel EEG
(IOP Publishing, 2019-02)
Objective. Motor imagery brain-computer interfaces (MI-BCIs) based on electroencephalography (EEG), a promising technology to provide assistance and support rehabilitation of neurological patients with sensorimotor ...
Coherence and frequency in the reticular activating system (RAS)
(Elsevier, 2012-10)
This review considers recent evidence showing that cells in the reticular activating system (RAS) exhibit 1) electrical coupling mainly in GABAergic cells, and 2) gamma band activity in virtually all of the cells. Specifically, ...
Mechanism behind gamma band activity in the pedunculopontine nucleus
(Wiley, 2011-07)
The pedunculopontine nucleus (PPN), part of the reticular activating system, modulates waking and paradoxical sleep. During waking and paradoxical sleep, EEG responses are characterized by low-amplitude, high-frequency ...
Gamma band activity in the developing parafascicular nucleus
(American Physiological Society, 2012-02)
The parafascicular nucleus (Pf) receives cholinergic input from the pedunculopontine nucleus, part of the reticular activating system involved in waking and rapid eye movement (REM) sleep, and sends projections to the ...
Spectrum estimation using frequency shifting and decimation
(Institution of Engineering and Technology, 2020-04)
Parametric spectral estimation techniques are widely used to estimate the parameters of sums of complex sinusoids corrupted by noise. In this work, we show that the numerical stability of the estimated frequencies not only ...
Time- and frequency-resolved covariance analysis for detection and characterization of seizures from intracraneal EEG recordings
(Springer, 2020-10)
The amount of power in different frequency bands of the electroencephalogram (EEG) carries information about the behavioral state of a subject. Hence, neurologists treating epileptic patients monitor the temporal evolution ...
Supernumerary chromosome variants in Dichroplus elongatus (Acrididae): Fluorescent banding and cline variation pattern
(BioOne, 2010-12)
Dichroplus elongatus is a South American grasshopper that shows simultaneous polymorphisms for B chromosomes and several supernumerary segments located in chromosome pairs S10, S9, and M6 (SS10, SS9 and SS6 respectively), ...
Interaction between non-Bragg band gaps in ID metamaterial photonic crystals
(Optical Society of America, 2006-12)
We consider periodic multilayers combining ordinary positive index materials and dispersive metamaterials with negative index in some frequency range. These structures can exhibit photonic band gaps which, in contrast with ...