Results 31 to 40 of about 329,555 (323)
Spatial Smoothing for Diffusion Tensor Imaging with low Signal to Noise Ratios [PDF]
, 2003 Though low signal to noise ratio (SNR) experiments in DTI give key information about tracking and anisotropy, e.g. by measurements with very small voxel sizes, due to the complicated impact of thermal noise such experiments are up to now seldom analysed.
Hahn, Klaus +2 more
core +2 more sources
SNR Wall Effect Alleviation by Generalized Detector Employed in Cognitive Radio Networks
Sensors, 2015 The most commonly used spectrum sensing techniques in cognitive radio (CR) networks, such as the energy detector (ED), matched filter (MF), and others, suffer from the noise uncertainty and signal-to-noise ratio (SNR) wall phenomenon.
Modar Safir Shbat, Vyacheslav Tuzlukov
doaj +1 more source
High Linearity SAR ADC for Smart Sensor Applications [PDF]
, 2018 This paper presents capacitive array optimization technique to improve the Spurious Free Dynamic Range (SFDR) and Signal-to-Noise-and-Distortion Ratio (SNDR) of Successive Approximation Register (SAR) Analog-to-Digital Converter (ADC) for smart sensor ...
Cen, Yuanjun +7 more
core +1 more source
Non orthogonal multiple access with wind energy harvesting
Alexandria 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
Boosting magnetic resonance imaging signal-to-noise ratio using magnetic metamaterials
Communications Physics, 2019 Magnetic resonance imaging (MRI) represents a mainstay among the diagnostic imaging tools in modern healthcare. Signal-to-noise ratio (SNR) represents a fundamental performance metric of MRI, the improvement of which may be translated into increased ...
G. Duan +3 more
semanticscholar +1 more source
Applied Sciences, 2022 As the noise power increases, the target signal features become less obvious, which leads to the failure of weak signal detection methods. To address this problem, a quantum weak signal detection method, Local Semi-Classical Signal Analysis-Singular ...
Tianyi Yu +5 more
doaj +1 more source
On Wiener Phase Noise Channels at High Signal-to-Noise Ratio
, 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
Upper Bound on the Capacity of Discrete-Time Wiener Phase Noise Channels [PDF]
, 2015 A discrete-time Wiener phase noise channel with an integrate-and-dump multi-sample receiver is studied. An upper bound to the capacity with an average input power constraint is derived, and a high signal-to-noise ratio (SNR) analysis is performed. If the
Barletta, Luca, Kramer, Gerhard
core +3 more sources
Low-SNR Doppler Data Processing for the InSight Radio Science Experiment
Remote Sensing, 2022 Radio Doppler measurements between the InSight lander and NASA’s Deep Space Network have been acquired for measuring the rotation of Mars. Unlike previous landers used for this purpose that utilized steerable high-gain antennas, InSight uses two fixed ...
Dustin Buccino +4 more
doaj +1 more source
Non-Data-Aided Parameter Estimation in an Additive White Gaussian Noise Channel
, 2005 Non-data-aided (NDA) parameter estimation is considered for binary-phase-shift-keying transmission in an additive white Gaussian noise channel. Cramer-Rao lower bounds (CRLBs) for signal amplitude, noise variance, channel reliability constant and bit ...
Brannstrom, Fredrik, Rasmussen, Lars K.
core +2 more sources