Effect of PWM Duty Cycle and Frequency of Power Supply to the LED Bulb Efficacy

Pawawoi, Andi; Prabowo, Wahyu

doi:10.11591/ijpeds.v8.i3.pp1011-1015

Cited by 2 publications

(1 citation statement)

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“…The complex data frame of each such group at the positions of QAM signals that do not fall within the frequency range of this group contains zero elements. Complex frames of these groups are fed to separate blocks N of a point IDFT, at the output of which FIR filters with impulse characteristics described by the expressions [10,18] The formation of the i-th data symbol UFMC as a function of discrete time can be described by the following expression:…”

Section: Resultsmentioning

confidence: 99%

Prospects of using the UFMC technology in 5G / IMT-2020 networks

Behadili¹,

Alshebaney

Attaby

2020

IJEECS

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<p>Subject of investigation. The article considers the technology of frequency multiplexing with universal filtering UFMC, planned to be introduced in the fifth generation of mobile communication networks, which allows maximizing the rate of decay of the side lobes of the multi frequency signal spectrum that cause out-of-band emissions. Method. As a method of investigation, a computational experiment was chosen. Main results. The parameters of the OFDM and UFMC signals were compared to determine the gain of the UFMC technology in the occupied bandwidth of the signal spectrum, as well as the number of arithmetic operations, required to generate a data symbol compared to the OFDM technology, on the basis of which, conclusions were made about the practical application of UFMC technology in networks mobile communication of the fifth generation. Practical significance. The conducted analysis can help to select the optimal number of sub-channels in groups in order to minimize the amount of computations during the UFMC symbol generation process.</p>

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Section: Resultsmentioning

confidence: 99%

Prospects of using the UFMC technology in 5G / IMT-2020 networks

Behadili¹,

Alshebaney

Attaby

2020

IJEECS

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Behavior of Led Light Sources in Pulse Power

Andriychuk¹,

Nakonechny²,

Osadtsa³

et al. 2021

Teh. elektrodin.

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The researches results of the energy and dynamic characteristics for FYL-3014 and ARPL-1W LEDs with different spectral radiation when voltage rectangular pulses feds to LEDs are presented in the paper. On the basis of obtained oscilograms it is established that electrical circuits of pulsed supply of the LEDs contain hidden reactive elements of inductive and capacitive nature. The substitution schemes are proposed for these circuits and their parameters have been determined. In substitution schemes that are proposed for these circuits the LED is represented by a parallel RC link, the active component of which is determined by the heterojunction's active region resistance, and the reactive one by a capacity that is equal diffuse capacity of transition. On the basis of analysis of obtained transient processes equations for these circles it established the attenuation coefficient's dependence on the resistance of the heterojunction's active region. The influence of pulse frequency on the LEDs energy efficiency has been investigated. It is established that the maximum pulse frequency of the FYL-3014 and ARPL-1W LEDs is equal 700 kHz. References 12, figures 6.

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Effect of PWM Duty Cycle and Frequency of Power Supply to the LED Bulb Efficacy

Cited by 2 publications

References 0 publications

Prospects of using the UFMC technology in 5G / IMT-2020 networks

Prospects of using the UFMC technology in 5G / IMT-2020 networks

Behavior of Led Light Sources in Pulse Power

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