Results 21 to 30 of about 1,355,826 (333)

iCap: New method for noise reduction in electroencephalography (EEG) signals

open access: yesمجلة جامعة دمشق للعلوم الهندسية, 2022
Electroencephalographic (EEG) signal’s importance increases as the neurotechnology research and industry accelerate. Therefore, it is crucial to acquire noise-free signals by maximising the signal-to-noise ratio (SNR). Many methods are followed to clean
Nibras ABO ALZAHAB Riham DAIEA Mhd Shafik ALNAHHAS
doaj  

Optical signal to noise ratio improvement through unbalanced noise beating in phase-sensitive parametric amplifiers [PDF]

open access: yes, 2014
We investigate the beating of signal and idler waves, which have imbalanced signal to noise ratios, in a phase-sensitive parametric amplifier. Imbalanced signal to noise ratios are achieved in two ways; first by imbalanced noise loading; second by ...
Andrekson, Peter   +4 more
core   +1 more source

Phrases in noise test (PINT) Brazil: effectiveness of the test in children with hearing loss

open access: yesBrazilian Journal of Otorhinolaryngology, 2021
Introduction: One of the main implications of hearing impairment is the difficulty in perceiving speech sounds, especially in noisy environments. Thus, the frequency-modulated system is considered an important educational tool for children with hearing ...
Regina Tangerino de Souza Jacob   +6 more
doaj   +1 more source

A study on correlation between thyroid CT radiation dose, image quality and female body composition [PDF]

open access: yesZhongguo aizheng zazhi
Background and purpose: With the increasing use of medical imaging examinations, Computed tomography (CT) scans have become one of the primary sources of effective dose.
SHEN Xigang, LIN Chengxiang, PENG Weijun, GU Yajia
doaj   +1 more source

Signal-to-noise ratio and signal-to-noise efficiency in SMASH imaging [PDF]

open access: yesMagnetic Resonance in Medicine, 1999
A general theory of signal-to-noise ratio (SNR) in simultaneous acquisition of spatial harmonics (SMASH) imaging is presented, and the predictions of the theory are verified in imaging experiments and in numerical simulations. In a SMASH image, multiple lines of k-space are generated simultaneously through combinations of magnetic resonance signals in ...
D K, Sodickson   +4 more
openaire   +2 more sources

Sequential joint signal detection and signal-to-noise ratio estimation

open access: yes, 2017
The sequential analysis of the problem of joint signal detection and signal-to-noise ratio (SNR) estimation for a linear Gaussian observation model is considered.
Fauß, M.   +3 more
core   +1 more source

Stochastic Resonance in a Dipole [PDF]

open access: yes, 1996
We show that the dipole, a system usually proposed to model relaxation phenomena, exhibits a maximum in the signal-to-noise ratio at a non-zero noise level, thus indicating the appearance of stochastic resonance.
A. Longtin   +26 more
core   +3 more sources

Design of Piecewise Uniform Scalar Quantizer with Geometric Progression of Segment Width

open access: yesAdvances in Electrical and Computer Engineering, 2011
In this paper, the design procedure of the piecewise uniform scalar quantizer having segments with widths that form a geometric progression is presented.
NIKOLIC, J., PERIC, Z.
doaj   +1 more source

Improved Radar Detection of Small Drones Using Doppler Signal-to-Clutter Ratio (DSCR) Detector

open access: yesDrones, 2023
The detection of drones using radar presents challenges due to their small radar cross-section (RCS) values, slow velocities, and low altitudes. Traditional signal-to-noise ratio (SNR) detectors often fail to detect weak radar signals from small drones ...
Jiangkun Gong   +4 more
doaj   +1 more source

On Wiener Phase Noise Channels at High Signal-to-Noise Ratio

open access: yes, 2013
Consider a waveform channel where the transmitted signal is corrupted by Wiener phase noise and additive white Gaussian noise (AWGN). A discrete-time channel model that takes into account the effect of filtering on the phase noise is developed. The model
Ghozlan, Hassan, Kramer, Gerhard
core   +1 more source

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