Results 11 to 20 of about 522,687 (294)

Integrated photonics enables continuous-beam electron phase modulation [PDF]

open access: yesNature, 2021
AbstractIntegrated photonics facilitates extensive control over fundamental light–matter interactions in manifold quantum systems including atoms1, trapped ions2,3, quantum dots4 and defect centres5. Ultrafast electron microscopy has recently made free-electron beams the subject of laser-based quantum manipulation and characterization6–11, enabling the
Jan-Wilke Henke   +13 more
openaire   +8 more sources

Comparative analysis of switching losses and current ripple of continuous and discontinuous SVPWM strategies for unbalanced two‐phase four‐leg VSI Fed unsymmetrical two‐phase induction motor

open access: yesIET Power Electronics, 2021
This paper presents a comparative analysis of the continuous space vector pulse width modulation and the discontinuous space vector pulse width modulation in terms of the switching losses and current ripple reduction for the unbalanced two‐phase four‐leg
Kaset Muangthong, Chakrapong Charumit
doaj   +1 more source

Optimal Parameter Design of Continuous Phase Modulation for Future GNSS Signals

open access: yesIEEE Access, 2021
Continuous phase modulation (CPM) is a power and spectrum efficient modulation that intrinsically possesses constant envelope, phase continuity as well as less out of band (OOB) radiation, especially appropriate for stringently bandwidth-constrained ...
Yanbo Sun
doaj   +1 more source

A Survey on Robust Modulation Requirements for the Next Generation Personal Satellite Communications

open access: yesFrontiers in Communications and Networks, 2022
The unrelenting technological advancement in the generation of wireless networks in recent years has awakened the motion concerning the inclusion of satellites in personal communications.
Julius Ssimbwa   +3 more
doaj   +1 more source

Optical Phase Locking techniques: an overview and a novel method based on Single Side Sub-Carrier modulation [PDF]

open access: yes, 2008
A short overview on Optical Phase locking techniques and a detailed description of the Phase Locking technique based on Sub-Carriers modulation is presented.
Camatel, S., Ferrero, Valter
core   +2 more sources

A monolithic MQW InP-InGaAsP-Based optical comb generator [PDF]

open access: yes, 2007
We report the first demonstration of a monolithic optical-frequency comb generator. The device is based on multi-section quaternary/quaternary eight-quantum-well InP-InGaAsP material in a frequency-modulated (FM) laser design. The modulation is generated
Cannard, P   +8 more
core   +1 more source

Research on the Performance Boundaries and Improvement Strategies of Oscillation Suppression in Continuously Adjustable Phase-Shifting Transformer [PDF]

open access: yesDianli jianshe
[Objective] To enhance the sub-synchronous oscillation suppression capability under high proportion of power electronic equipment conditions in power grids, promote the application of continuous tunable phase shifters in power flow regulation and ...
DU Jingyan, CHEN Junjie, LIN Jinjiao, WANG Chuyang
doaj   +1 more source

Significantly fast spinodal decomposition and inhomogeneous nanoscale martensitic transformation in Ti–Nb–O alloys [PDF]

open access: yesMATEC Web of Conferences, 2020
The β phase spinodal decomposition during continuous cooling in Ti‒Nb‒O alloys is investigated by the phase-field method. Addition of only a few at.%O to Ti‒23Nb (at.%) alloy remarkably increases the driving force of the β phase spinodal decomposition ...
ISHIGURO Yuya   +2 more
doaj   +1 more source

Neural net-based continuous phase modulation receivers [PDF]

open access: yesIEEE Transactions on Communications, 1990
Feed-forward neural nets (NN) are proposed as receivers for partial-response CPM (continuous phase modulation) systems. The approach involves replacing the entire receiver structure, excluding timing recovery, with a neural-net unit whose inputs are time samples of the incoming baseband signals and whose outputs are the decoded symbols.
de Veciana, Gustavo, Zakhor, Avideh
openaire   +2 more sources

Broader, flatter optical spectra of passively mode-locked semiconductor lasers for a wavelength-division multiplexing source [PDF]

open access: yes, 1997
Using the time domain master equation for a complex electric-field pulse envelope, we find analytical results for the optical spectra of passively mode-locked semiconductor lasers. The analysis includes the effect of optical nonlinearity of semiconductor
Eliyahu, Danny   +2 more
core   +1 more source

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