Results 31 to 40 of about 4,109,115 (314)

Analysis of MSK jamming effectiveness based on effective jamming coefficient

open access: yesTongxin xuebao, 2022
For the problem of communication jamming effectiveness, an effective jamming coefficient was proposed as an evaluation metric based on the correlation between jamming and communication signals, and the impact of orthogonal receivers was analyzed ...
Zengmao CHEN   +3 more
doaj  

Deep Learning in Digital Modulation Recognition Using High Order Cumulants

open access: yesIEEE Access, 2019
By considering the different cumulant combinations of the 2FSK, 4FSK, 2PSK, 4PSK, 2ASK, and 4ASK, this paper established new identification parameters to achieve the recognition of those digital modulations.
Wenwu Xie   +5 more
semanticscholar   +1 more source

Symbol and Bit Error Rates Analysis of Hybrid PIM-CDMA

open access: yesEURASIP Journal on Wireless Communications and Networking, 2005
A hybrid pulse interval modulation code-division multiple-access (hPIM-CDMA) scheme employing the strict optical orthogonal code (SOCC) with unity and auto- and cross-correlation constraints for indoor optical wireless communications is proposed. In this
Ghassemlooy Z., See C. K.
doaj   +2 more sources

A Nuclear Magnetic Resonance Radiofrequency Pulse Transmitter Based on Digital Modulation Technology

open access: yesChinese Journal of Magnetic Resonance, 2018
Radiofrequency (RF) pulse transmitter is an important part of a nuclear magnetic resonance (NMR) spectrometer. In this paper, a simple NMR RF pulse transmitter was designed based on field programmable gate array (FPGA) and direct digital synthesis (DDS ...
ZHU Yun-feng   +6 more
doaj   +1 more source

Graft-Versus-Host Disease Prevention by In Vitro-Generated Myeloid-Derived Suppressor Cells Is Exclusively Mediated by the CD11b+CD11c+ MDSC Subpopulation

open access: yesFrontiers in Immunology, 2021
Myeloid-derived suppressor cells (MDSCs) are a heterogeneous population of myeloid progenitor cells that dampen overwhelming adaptive immune responses through multiple mechanisms and are recognized as an attractive novel immune intervention therapy for ...
Jasmin Scheurer   +7 more
doaj   +1 more source

Segmented optical transmitter comprising a CMOS driver array and an InP IQ-MZM for advanced modulation formats [PDF]

open access: yes, 2017
Segmented Mach-Zehnder modulators are promising solutions to generate complex modulation schemes in the migration towards optical links with a higher-spectral efficiency.
Aimone, Alessandro   +12 more
core   +1 more source

Automatic Digital Modulation Classification Based on Curriculum Learning

open access: yesApplied Sciences, 2019
Neural network shows great potential in modulation classification because of its excellent accuracy and achievability but overfitting and memorizing data noise often happen in previous researches on automatic digital modulation classifier.
M. Zhang   +5 more
semanticscholar   +1 more source

PVDF-based dielectric polymers and their applications in electronic materials

open access: yesIET Nanodielectrics, 2018
The attractive dielectric poly(vinylidene fluoride) (PVDF) and its copolymers are well confirmed possessing the highest electroactive response including dielectric constant, piezoelectric and ferroelectric effects, which have increasingly wide range of ...
Weimin Xia, Zhicheng Zhang
doaj   +1 more source

Digital Modulation of Coherently-Coupled $2\times1$ Vertical-Cavity Surface-Emitting Laser Arrays

open access: yesIEEE Photonics Technology Letters, 2019
We experimentally demonstrated enhanced digital modulation of coherently coupled vertical-cavity surface-emitting laser arrays. Mutually coherent behavior of $2\times 1$ proton-implanted index-confined photonic crystal vertical-cavity phased laser ...
Harshil Dave   +6 more
semanticscholar   +1 more source

Spectral characteristics of DDPM streams and their application to all‐digital amplitude modulation

open access: yesElectronics Letters, 2021
A new closed‐form expression of the spectral coefficients of the digital streams obtained by dyadic digital pulse modulation is presented and validated in this letter.
P. S. Crovetti
doaj   +1 more source

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