Results 51 to 60 of about 139,045 (195)

Efficiency of adaptive filter with envelope tracking algorithm when receiving signals with multi-position PSK against the background of non-fluctuation interferences

open access: yesРоссийский технологический журнал, 2020
The energy and spectral advantages of signals with phase-shift keying predetermined their widespread use in modern digital navigation, communications and television systems.
G. V. Kulikov, Trung Tien Do
doaj   +1 more source

High-harmonic generation in solids with and without topological edge states

open access: yes, 2018
High-harmonic generation (HHG) in the two topological phases of a finite, one-dimensional, periodic structure is investigated using a self-consistent time-dependent density functional theory (TDDFT) approach. For harmonic photon energies smaller than the
Bauer, Dieter, Hansen, Kenneth K.
core   +1 more source

Adaptable Bandwidth for Harmonic Step-Frequency Radar

open access: yesInternational Journal of Antennas and Propagation, 2015
A spectrum sensing technique is described which is used to enhance the performance of harmonic step-frequency radar in the presence of harmful radio frequency (RF) interference (RFI). This technique passively monitors the RF spectrum for subbands of high
Anthony F. Martone   +6 more
doaj   +1 more source

Detailed study of quantum path interferences in high harmonic generation driven by chirped laser pulses

open access: yesNew Journal of Physics, 2021
We investigate the electron quantum path interference (QPI) effects during high harmonic generation in atomic gas medium driven by ultrashort chirped laser pulses.
Tamás Csizmadia   +9 more
doaj   +1 more source

HARMONIC SIGNAL EXTRACTION FROM STRONG CHAOTIC INTERFERENCE

open access: yesActa Physica Sinica, 2001
The problem of signal extraction from received data contaminated with strong chaotic interference has been investigated and a novel approach to this problem is proposed based on the geometry of chaotic interference. According to this approach, chaotic attractor is first reconstructed from the received data, then in the way of projecting chaotic ...
null WANG FU-PING   +4 more
openaire   +1 more source

Spectral Interference in High Harmonic Generation from Solids

open access: yes, 2019
Various interference effects are known to exist in the process of high harmonic generation (HHG) both at the single atom and macroscopic levels. In particular, the quantum path difference between the long and short trajectories of electron excursion ...
Bian, Xue-Bin   +7 more
core   +2 more sources

Testing Quantum Coherence in Stochastic Electrodynamics with Squeezed Schrödinger Cat States

open access: yesAtoms, 2019
The interference pattern in electron double-slit diffraction is a hallmark of quantum mechanics. A long-standing question for stochastic electrodynamics (SED) is whether or not it is capable of reproducing such effects, as interference is a manifestation
Wayne Cheng-Wei Huang, Herman Batelaan
doaj   +1 more source

Mine tagless target location method based on combined space and frequency diversity

open access: yesGong-kuang zidonghua, 2020
Due to complicated underground environment, traditional active location technologies make it inconvenient for workers to carry tags or lose tags during operation, which are limited in application of underground target location, while existing passive ...
TENG Yue   +5 more
doaj   +1 more source

Harmonic Current Detection And Control Of Active Power Filter Based On Signal Processing

open access: yesJournal of Applied Science and Engineering, 2023
With the advance of social science and technology, the wide use of power equipment and devices has brought a lot of harmonic interference to the power system.
Xuetang Lei, Yaya Xie, Jinkai Lei
doaj   +1 more source

Experimental Demonstration of Squeezed State Quantum Averaging [PDF]

open access: yes, 2010
We propose and experimentally demonstrate a universal quantum averaging process implementing the harmonic mean of quadrature variances. The harmonic mean protocol can be used to efficiently stabilize a set of fragile squeezed light sources with ...
A. Berthiaume   +11 more
core   +5 more sources

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