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

Jbari, Mohamed El; Moussaoui, Mohamed

doi:10.1016/j.prime.2022.100061

Cited by 6 publications

(3 citation statements)

References 20 publications

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“…Although not used for the same utilization or purpose and not in the same manner, the idea of a mixed control of duty cycle and of forward current has been previously considered in other applications. Thus, the concept was confirmed to provide better results through a hybrid pulse amplitude and width modulation, as was already highlighted in [ 39 ], where the chromaticity shifting was better mitigated with this technique, but also in [ 40 ], where higher throughput and improved efficiency was achieved with a new PAM and PWM combination.…”

Section: Resultsmentioning

confidence: 58%

Increasing Vehicular Visible Light Communications Range Based on LED Current Overdriving and Variable Pulse Position Modulation: Concept and Experimental Validation

Beguni

Căilean

Avatamanitei

et al. 2023

Sensors

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Due to its unique advantages, the integration of Visible Light Communications (VLC) in vehicle safety applications has become a major research topic. Nevertheless, as this is an emergent technology, several challenges must be addressed. One of the most important of these challenges is oriented toward increasing vehicular VLC systems’ communication range. In this context, this article proposes a novel approach that provides a significant communication distance enhancement. Different from most existing works on this topic, which are based on refining the VLC receiver, this new article is focused on improving the VLC system based on the benefits that can be achieved through the VLC transmitter. The concept is based on Light-Emitting Diode (LED) current overdriving and a modified Variable Pulse Position Modulation (VPPM). Therefore, LED current overdriving provides the VLC receiver higher instantaneous received optical power and improved Signal-to-Noise Ratio (SNR), whereas the use of the VPPM ensures that the VLC transmitter respects eye regulation norms and offers LED protection against overheating. The concept has been experimentally tested in laboratory conditions. The experimental results confirmed the viability of the concept, showing an increase of the communication range by up to 370%, while maintaining the same overall optical irradiance at the VLC transmitter level. Therefore, this new approach has the potential to enable vehicular VLC ranges that cover the requirements of communication-based vehicle safety applications. To the best of our knowledge, this concept has not been previously exploited in vehicular VLC applications.

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Section: Resultsmentioning

confidence: 58%

Increasing Vehicular Visible Light Communications Range Based on LED Current Overdriving and Variable Pulse Position Modulation: Concept and Experimental Validation

Beguni

Căilean

Avatamanitei

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…Researchers in the field of 6G wireless communication are increasingly interested in optical wireless communication (OWC) systems, such as visible light communication (VLC) due to its potential as a green and attractive technology for wireless communications in various environments, including indoor, vehicular, underwater, industry 4.0, and IoT applications 1 , 2 . VLC has demonstrated its reliability in transmitting data at high rates while providing energy-efficient, high-transmission capabilities and vast spectrum resources within the electromagnetic spectrum of 370 to 800 THz.…”

Section: Introductionmentioning

confidence: 99%

“…VLC has demonstrated its reliability in transmitting data at high rates while providing energy-efficient, high-transmission capabilities and vast spectrum resources within the electromagnetic spectrum of 370 to 800 THz. However, the VLC channel model can be either free space or underwater, leading to an increase in channel nonlinearities that can affect system performance, requiring more complex receiver designs 1 . This becomes more challenging when there are more variables to estimate.…”

Section: Introductionmentioning

confidence: 99%

Efficient downlink MU-MIMO VLC systems with NOMA-OTFS modulation for indoor applications

El Jbari,

Moussaoui

2024

Opt. Eng.

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In optical wireless communication (OWC), visible light communication (VLC) has shown great potential and attractive performance in indoor environments. However, the limited modulation bandwidth of VLC technologies poses performance restrictions. We propose a new approach for downlink communication utilizing multiple-input multiple-output (MIMO) technology. Our approach integrates non-orthogonal multiple access (NOMA) with orthogonal time frequency space modulation (OTFS) to improve transmission performance, particularly for low mobility when using NOMA-OTFS. Our proposed work focuses on the crucial stage of NOMA with successive interference cancellation (SIC), which involves equalization using efficient schemes, such as decision feedback equalizer (DFE), frequency-domain zero-forcing linear equalizer, and minimum mean square error-SIC at the receiver. Through extensive experimentation, it is observed that the DFE with SIC outperforms other equalizers, demonstrating a lower outage probability and a better BER. The effectiveness of the optimized analytical algorithm for ML-based downlink NOMA-OTFS modulation is confirmed through theoretical BER validation. Moreover, the simulation findings indicate that, in a multiuser (MU) scenario, the proposed NOMA-OTFS exhibits a high performance compared with traditional NOMA combined with orthogonal frequency division multiplexing in downlink MU-MIMO VLC systems. This performance advantage is observed for both MIMO and multiple-input single-output multiplexing techniques with power allocation of the users, specifically in terms of BER improvement and peak-to-averagepower ratio reduction.

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High-Performance Metric of Graphene-Based Heterojunction LEDs and PDs in Visible Light Communication Systems

Jbari

Moussaoui

2023

Advanced Structured Materials

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

Cited by 6 publications

References 20 publications

Increasing Vehicular Visible Light Communications Range Based on LED Current Overdriving and Variable Pulse Position Modulation: Concept and Experimental Validation

Increasing Vehicular Visible Light Communications Range Based on LED Current Overdriving and Variable Pulse Position Modulation: Concept and Experimental Validation

Efficient downlink MU-MIMO VLC systems with NOMA-OTFS modulation for indoor applications

High-Performance Metric of Graphene-Based Heterojunction LEDs and PDs in Visible Light Communication Systems

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