Results 11 to 20 of about 74,271 (311)

High‐frequency pulse width modulation noise reduction for permanent magnet synchronous motors using hybrid asymmetrical regular sampled modified space‐vector pulse width modulation

open access: yesIET Power Electronics, 2021
This paper proposes a strategy called hybrid asymmetrical regular sampled modified space‐vector pulse width modulation technique in two‐level voltage source inverters.
Wentao Zhang   +3 more
doaj   +1 more source

Efficient n-M-PAWM hybrid modulation scheme for high data transmission in visible light communication system

open access: yese-Prime: Advances in Electrical Engineering, Electronics and Energy, 2022
Visible-Light Communications (VLC) is a new wireless communication technology, which has attracted particular attention as a promising solution for very high speed 5G, and 6G wireless networks in indoor environments.
Mohamed El Jbari, Mohamed Moussaoui
doaj   +1 more source

PWM-based PPM format for dimming control in visible light communication system [PDF]

open access: yes, 2012
We report simulation results of pulse width modulation (PWM)-based pulse position modulation (PPM) signal format for visible light communication systems. For simultaneous operation of data transmission and dimming control, PPM data format is added to PWM
Jang, Hyung-Joon   +7 more
core   +1 more source

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

Comparison of single- and double-sided pulse width modulated signals with non-linear predistortion [PDF]

open access: yes, 2012
Class D amplifiers are based on a low-bit pulse width modulated (PWM) signal reconstructed through the lowpass characteristic of the loudspeaker. To create a PWM signal, a non-linear conversion from a standard pulse code modulated (PCM) signal has to be ...
Weiss, Stephan   +7 more
core   +1 more source

A General Pulse Width Modulation Method for Zero-Voltage-Switching Active-clamping Three-phase Power Converters: Edge Aligned Pulse Width Modulation (EA-PWM)

open access: yesIEEE Open Journal of Power Electronics, 2020
A general PWM method for soft-switching three-phase power converters-Edge Aligned PWM (EA-PWM) is proposed. It aligns all the high loss commutation instants of the converter bridges in a switching cycle at the same instant so that all the switches of the
Keyan Shi, Jinyi Deng, Dehong Xu
doaj   +1 more source

Spectral characterisation of shortened pulse position modulation format [PDF]

open access: yes, 2010
Shortened pulse position modulation (SPPM) is a new modulation format that has recently been proposed for underwater wireless optical communications. A full spectral characterisation of SPPM is considered and original expressions are presented, which ...
Cryan, R.A.
core   +1 more source

Spectral characterisation of nk pulse position modulation format [PDF]

open access: yes, 2005
nk pulse position modulation (PPM) is a new modulation format that has recently been proposed for the optical wireless channel. This Letter considers, for the first time, a full spectral characterisation of -PPM and presents original expressions, which
Cryan, R.A., Menon, M.
core   +1 more source

Improvement of Pulse-Width Modulation Algorithm for Thermal Plant Control [PDF]

open access: yes, 2017
The results of the pulse-width modulation algorithms analysis are presented in the paper. The following two algorithms are analyzed: pulse-width modulator (PWM) based on the sawtooth waveform generator and PWM based on an integrator and a switch element.
Sviatoslav Klos   +3 more
core   +1 more source

Phase accumulated carrier pulse width modulation [PDF]

open access: yes, 2015
An alternative approach to digital PWM generation uses an accumulator rather than a counter to generate the carrier. This offers several advantages.
Gerard F. Ledwich   +5 more
core   +1 more source

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