Sensitivity Gains by Mismatched Probabilistic Shaping for Optical Communication Systems [PDF]
, 2015 Probabilistic shaping of quadrature amplitude modulation (QAM) is used to enhance the sensitivity of an optical communication system. Sensitivity gains of 0.43 dB and 0.8 dB are demonstrated in back-to-back experiments by shaping of 16QAM and 64QAM ...
Alvarado, Alex +5 more
core +3 more sources
Detecting shapes in noise: tuning characteristics of global shape mechanisms [PDF]
Frontiers in Computational Neuroscience, 2013 The proportion of signal elements embedded in noise needed to detect a signal is a standard tool for investigating motion perception. This paradigm was applied to the shape domain to determine how local information is pooled into a global percept. Stimulus arrays consisted of oriented Gabor elements that sampled the circumference of concentric radial ...
Schmidtmann, Gunnar +3 more
openaire +3 more sources
Noise shaping Asynchronous SAR ADC based time to digital converter [PDF]
, 2018 Time-to-digital converters (TDCs) are key elements for the digitization of timing information in modern mixed-signal circuits such as digital PLLs, DLLs, ADCs, and on-chip jitter-monitoring circuits.
Katragadda, Sowmya
core +1 more source
Design of a multi-bit quantization high-precision microaccelerometer system
Dianzi Jishu Yingyong, 2018 In order to achieve a stable and high-precision micromechanical accelerometer system based on the system noise-shaping ability, a high precision accelerometer system with multi-bit quantization is proposed.
Wang Baosheng, Zhao Gangbin
doaj +1 more source
Noise in a Calorimeter Readout System Using Periodic Sampling [PDF]
, 2009 Fourier transform analysis of the calorimeter noise problem gives quantitative results on a) the time-height correlation, b) the effect of background on optimal shaping and on the ENC, c) sampling frequency requirements, and d) the relation between ...
Innes, Walter R.
core +2 more sources
IEEE Access, 2021 In AC motor powered by frequency converter, the random pulse width modulation (RPWM) can suppress vibration and noise power near the switching frequency and its integer multiple of the inverter.
Guohua Li, Zhenfang Fu, Yufeng Wang
doaj +1 more source
Analysis of VCO based noise shaping ADCs linearized by PWM modulation [PDF]
, 2012 Nonlinearity is one of the main problems associated with VCO based noise shaping ADCs. Their open loop architecture does not permit correction of the nonlinear voltage to frequency response of the VCO by feedback.
Hernandez, Luis +3 more
core +2 more sources
Discrete EKF with pairwise Time Correlated Measurement Noise for Image-Aided Inertial Integrated Navigation [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2014 An image-aided inertial navigation implies that the errors of an inertial navigator are estimated via the Kalman filter using the aiding measurements derived from images.
N. S. Gopaul, J. G. Wang, B. Hu
doaj +1 more source
Perspectives on Beam-Shaping Optimization for Thermal-Noise Reduction in Advanced Gravitational-Wave Interferometric Detectors: Bounds, Profiles, and Critical Parameters [PDF]
, 2007 Suitable shaping (in particular, flattening and broadening) of the laser beam has recently been proposed as an effective device to reduce internal (mirror) thermal noise in advanced gravitational wave interferometric detectors.
Agresti, Juri +5 more
core +2 more sources
A CMOS Low-Power Noise Shaping-Enhanced SMASH ΣΔ Modulator
Majlesi Journal of Electrical Engineering, 2022 A discrete-time (DT) high-resolution and low-power sturdy multi-stage noise-shaping (SMASH) sigma-delta (ΣΔ) modulator is introduced. It proposes major solution for high-resolution applications relying on M-bit digital input-feedforward (DFF) technique ...
Habibeh Fakhraie +3 more
doaj +1 more source