Results 31 to 40 of about 1,356,190 (187)

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

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

Observation of Stochastic Resonance in Percolative Josephson Media [PDF]

open access: yes, 2002
Measurements of the electrical response of granular Sn-Ge thin films below the superconducting transition temperature are reported. The addition of an external noise to the magnetic field applied to the sample is found to increase the sample voltage ...
A. G. Sivakov   +5 more
core   +2 more sources

Non orthogonal multiple access with wind energy harvesting

open access: yesAlexandria Engineering Journal, 2023
In this paper, we derive the performance of wireless communications using wind energy harvesting. We study the single-user and multi-user scenarios using Non Orthogonal and Orthogonal Multiple Access (NOMA and OMA).
Raed Alhamad, Hatem Boujemaa
doaj   +1 more source

Estimation of SNR Including Quantization Error of Multi-Wavelength Lidar Receiver

open access: yesAl-Khawarizmi Engineering Journal, 2013
This paper comprises the design and operation of mono-static backscatter lidar station based on a pulsed Nd: YAG laser that operates at multiple wavelengths.
Zena A. Abed, Muna M. Hummady
doaj   +2 more sources

Design of Switched Quantizers and Speech Coding Based on Quasi-Logarithmic Compandor

open access: yesElektronika ir Elektrotechnika, 2018
This article investigates switched quantizers for speech signal depicted with Gaussian probability density function (PDF). Gaussian PDF is better for smaller frame lengths that are represented here.
Nikola J. Vucic   +2 more
doaj   +1 more source

Bounds on Portfolio Quality [PDF]

open access: yes, 2014
The signal-noise ratio of a portfolio of p assets, its expected return divided by its risk, is couched as an estimation problem on the sphere. When the portfolio is built using noisy data, the expected value of the signal-noise ratio is bounded from ...
Pav, Steven E.
core  

Gravitational waves from eccentric compact binaries: Reduction in signal-to-noise ratio due to nonoptimal signal processing [PDF]

open access: yes, 1999
Inspiraling compact binaries have been identified as one of the most promising sources of gravitational waves for interferometric detectors. Most of these binaries are expected to have circularized by the time their gravitational waves enter the ...
A. Gopakumar   +31 more
core   +2 more sources

Sensitivity of wide band detectors to quintessential gravitons [PDF]

open access: yes, 1999
There are no reasons why the energy spectra of the relic gravitons, amplified by the pumping action of the background geometry, should not increase at high frequencies.
A. A. Starobinsky   +47 more
core   +2 more sources

Pitfalls in the Detection of Hearing Loss via Otoacoustic Emissions

open access: yesApplied Sciences, 2021
Otoacoustic emissions (OAEs) are currently used as a valuable audiological test or as a hearing screening tool. There are many commercially available OAE recording systems that are used both for clinical practice and for research.
W. Wiktor Jedrzejczak   +5 more
doaj   +1 more source

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