Results 11 to 20 of about 60,917 (265)

A Bandwidth Efficient Hybrid Multilevel Pulse Width Modulation for Visible Light Communication System: Experimental and Theoretical Evaluation

open access: yesIEEE Open Journal of the Communications Society, 2022
Visible light communication (VLC) is considered a new technology for interconnecting devices in 5G and beyond. VLC can provide additional bandwidth for communicating devices which can help to reduce the radio frequency bandwidth congestion. In this work,
Mohammad Abrar Shakil Sejan   +3 more
doaj   +1 more source

Optimized amplitude modulated multiband RF pulse design [PDF]

open access: yesMagnetic Resonance in Medicine, 2017
PurposeMultiband pulses are characterized by highly temporally modulated waveforms. Rapid phase or frequency modulation can be extremely demanding on the performance of radiofrequency (RF) pulse generation, which can lead to errors that can be avoided if pulses are restricted to amplitude modulation (AM) only.
Abo Seada, Samy   +3 more
openaire   +3 more sources

Hybrid Modulation for Modular Voltage Source Inverters with Coupled Reactors

open access: yesEnergies, 2020
This paper proposes and discusses a concept of a hybrid modulation for the control of modular voltage source inverters with coupled reactors. The use of coupled reactors as the integrating elements leads to significant reduction in the size and weight of
Krzysztof Jakub Szwarc   +5 more
doaj   +1 more source

Direct Detection of Bipolar Pulse Amplitude Modulation

open access: yesJournal of Lightwave Technology, 2020
Pulse amplitude modulation (PAM) is a widely employed digital modulation format. PAM formats are generally classified as bipolar PAM (BPAM) if using both positive and negative amplitude levels, and unipolar PAM (UPAM) if using only non-negative amplitude levels.
Marco Secondini, Enrico Forestieri
openaire   +2 more sources

Experimental Comparison of PAM, CAP, and DMT Modulations in Phosphorescent White LED Transmission Link

open access: yesIEEE Photonics Journal, 2015
In the paper, an experimental comparison of pulse amplitude, carrierless amplitude-phase, and discrete multitone modulations is carried in a visible light communications link employing white phosphorescent light-emitting diode (LED) as a transmitter.
G. Stepniak, L. Maksymiuk, J. Siuzdak
doaj   +1 more source

Investigation of the wakefield generation in the interaction of the intense laser pulse with gas [PDF]

open access: yesمجله علوم و فنون هسته‌ای, 2021
In the present work, the formation of the wakefield during the interaction of intense laser pulse with a gas medium has been investigated by using PIC simulation code, including the ionization process.
E. Khalilzadeh, M.J. Jafari, Z. Dehghany
doaj   +1 more source

DFT Spread-Optical Pulse Amplitude Modulation for Visible Light Communication Systems

open access: yesIEEE Access, 2022
DC-biased optical orthogonal frequency division multiplexing (DCO-OFDM) has been proposed in visible light communication (VLC) to overcome the limited modulation bandwidth of light emitting diode (LED).
Osama Saied   +2 more
doaj   +1 more source

M-ary Amplitude Shift Keying Power and Information Synchronous Transmission Based on Phase-Shifted Full-Bridge

open access: yesApplied Sciences, 2022
This paper proposes an M-ary amplitude shift keying (MASK) power and information synchronous transmission system based on phase-shifted full-bridge (PSFB) for applications in wireless power transmission (WPT).
Xin Zhang   +5 more
doaj   +1 more source

Flexible Quadrature Spatial Pulse Amplitude Modulation for VLC Systems

open access: yesIEEE Systems Journal, 2022
Quadrature-spatial modulation (QSM) offers high spectral efficiency (SE) without interchannel interference for both radio frequency and visible light communication (VLC) systems. In this article, a new QSM scheme called flexible quadrature spatial pulse amplitude modulation (FQSPAM) is proposed for VLC systems.
Yasin Celik   +2 more
openaire   +4 more sources

Neural network model of vestibular nuclei reaction to onset of vestibular prosthetic stimulation

open access: yesFrontiers in Bioengineering and Biotechnology, 2016
The vestibular system incorporates multiple sensory pathways to provide crucial information about head and body motion. Damage to the semicircular canals, the peripheral vestibular organs that sense rotational velocities of the head, can severely degrade
Jack eDigiovanna   +5 more
doaj   +1 more source

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