Results 71 to 80 of about 1,635,520 (251)
Constellation Optimization in the Presence of Strong Phase Noise
, 2013 In this paper, we address the problem of optimizing signal constellations for strong phase noise. The problem is investigated by considering three optimization formulations, which provide an analytical framework for constellation design.
Amat, Alexandre Graell i +3 more
core +1 more source
Extended Noise Analysis Model of CW-type Radar Sensors with IQ Down-Conversion [PDF]
Radioengineering, 2018 CW-type structures belong to the most frequently employed radars, especially in a form of small sensors used, for example, in security applications or automotive industry.
V. Jenik, P. Hudec, P. Panek
doaj
Phase Structure of Systems with Multiplicative Noise [PDF]
Physical Review Letters, 1996 The phase diagrams and transitions of nonequilibrium systems with multiplicative noise are studied theoretically. We show the existence of both strong and weak-coupling critical behavior, of two distinct active phases, and of a nonzero range of parameter values over which the susceptibility is infinite in any dimension.
Miguel A. Muñoz, G. Grinstein, Yuhai Tu
openaire +4 more sources
Phase-dependent noise in Josephson junctions [PDF]
The European Physical Journal Applied Physics, 2018 In addition to the usual superconducting current, Josephson junctions (JJs) support a phase-dependent conductance related to the retardation effect of tunneling quasi-particles. This introduces a dissipative current with a memory-resistive (memristive) character that should also affect the current noise.
Sheldon, Forrest +3 more
openaire +3 more sources
Noise characterization of an Optical Frequency Comb using Offline Cross-Correlation
, 2016 Using an offline cross-correlation technique, we have analyzed the noise behavior of a new type of optical frequency comb (OFC), which is carrier envelope offset (CEO) free by configuration, due to difference frequency generation.
Champenois, Caroline +8 more
core +2 more sources
Temporal evolution of photorefractive double phase-conjugate mirrors [PDF]
, 1993 We present wave-optics calculations of the temporal and spatial evolution from random noise of a double phase-conjugate mirror in photorefractive media that show its image exchange and phase-reversal properties.
Engin, Doruk +3 more
core +1 more source
A 0.8 V Low-Power Wide-Tuning-Range CMOS VCO for 802.11ac and IoT C-Band Applications
Journal of Low Power Electronics and ApplicationsThis paper presents a 0.8 V low-power CMOS voltage-controlled oscillator (VCO) with a wide tuning range, fabricated using a TSMC 0.18 μm process. The proposed design incorporates body-biasing techniques and an optimized varactor structure to achieve a ...
Jung-Jen Hsu +2 more
doaj +1 more source
Over-the-Air Phase Noise Spectral Density Measurement for FMCW Radar Sensors
IEEE Journal of MicrowavesPhase noise significantly degrades the performance of frequency-modulated continuous wave (FMCW)- and chirp sequence (CS)-based radar sensors. Knowledge of the power spectral density (PSD) of these sensors is therefore essential for estimating their ...
Christoph Birkenhauer +2 more
doaj +1 more source
Phase Separation Driven by External Fluctuations [PDF]
, 1997 The influence of external fluctuations in phase separation processes is analysed. These fluctuations arise from random variations of an external control parameter.
A. M Lacasta +6 more
core +3 more sources
Phase noise and the classification of natural images
Vision Research, 2006 We measured the effect of global phase manipulations on a rapid animal categorization task. The Fourier spectra of our images of natural scenes were manipulated by adding zero-mean random phase noise at all spatial frequencies. The phase noise was the independent variable, uniformly and symmetrically distributed between 0 degrees and +/-180 degrees ...
Wichmann, F. +2 more
openaire +4 more sources