On the indoor VLC link evaluation based on the racian K-factor
- Ndjiongue, Alain R., Ngatched, Telex M. N., Ferreira, Hendrik C.
- Authors: Ndjiongue, Alain R. , Ngatched, Telex M. N. , Ferreira, Hendrik C.
- Date: 2018
- Subjects: VLC , K-factor , VLC link analysis
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/283726 , uj:30610 , Citation: Ndjiongue, A.R., Ngatched, T.M.N. & Ferreira, H.C. 2018. On the indoor VLC link evaluation based on the racian K-factor.
- Description: Abstract: In visible light communications (VLC) technology, the channel is generally modeled as a multi-path propagation environment. This is due to the presence, on the photo-detector (PD), of specular and non-specular signal components. The Racian K-factor is exploited in such environments to measure the dominance of the line-of-sight (LoS) signal power over that of the non-LoS (NLoS) link. In this paper, K is exploited in the evaluation of the VLC link. Examples of the use of K is underlined in the computation of few link evaluation metrics including the signal-to-noise ratio (SNR), , the channel capacity, C, and the outage probability
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- Authors: Ndjiongue, Alain R. , Ngatched, Telex M. N. , Ferreira, Hendrik C.
- Date: 2018
- Subjects: VLC , K-factor , VLC link analysis
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/283726 , uj:30610 , Citation: Ndjiongue, A.R., Ngatched, T.M.N. & Ferreira, H.C. 2018. On the indoor VLC link evaluation based on the racian K-factor.
- Description: Abstract: In visible light communications (VLC) technology, the channel is generally modeled as a multi-path propagation environment. This is due to the presence, on the photo-detector (PD), of specular and non-specular signal components. The Racian K-factor is exploited in such environments to measure the dominance of the line-of-sight (LoS) signal power over that of the non-LoS (NLoS) link. In this paper, K is exploited in the evaluation of the VLC link. Examples of the use of K is underlined in the computation of few link evaluation metrics including the signal-to-noise ratio (SNR), , the channel capacity, C, and the outage probability
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Design of energy efficient hybrid VLC/RF/PLC communication system for indoor networks
- Aboagye, Sylvester, Ibrahim, Ahmed, Ngatched, Telex M. N., Ndjiongue, Alain R., Dobre, Octavia A.
- Authors: Aboagye, Sylvester , Ibrahim, Ahmed , Ngatched, Telex M. N. , Ndjiongue, Alain R. , Dobre, Octavia A.
- Date: 2019
- Subjects: Energy efficiency , Visible light communication , Power line communication
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/399299 , uj:33275 , Citation: Aboagye, S. et al. 2019. Design of energy efficient hybrid VLC/RF/PLC communication system for indoor networks.
- Description: Abstract: Integrating visible light communication (VLC) system with indoor radio frequency (RF) network is seen as a possible way of increasing the capacity and coverage of indoor networks. In such a hybrid network, the traffic generated at the indoor RF and VLC access points must be backhauled to the core network. Power line communication (PLC) technology is seen as a cost-effective backhaul (BH) solution due to its infrastructure availability in every home. In this letter, a novel system model that captures the joint effect of power and BH flow optimization for hybrid VLC/RF/PLC indoor communication network is proposed. For the proposed system model, the problem of energy efficiency (EE) maximization via power and BH flow optimization is formulated as a non-convex problem, and then transformed into a convex problem via the Dinkelbach’s approach. An energy efficient algorithm is proposed to solve this joint problem to optimality. Simulation results are used to verify the superiority of the proposed hybrid VLC/RF/PLC system and algorithm over a conventional indoor RF system and equal power allocation benchmark scheme, respectively, in terms of network throughput, power consumption, and EE.
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- Authors: Aboagye, Sylvester , Ibrahim, Ahmed , Ngatched, Telex M. N. , Ndjiongue, Alain R. , Dobre, Octavia A.
- Date: 2019
- Subjects: Energy efficiency , Visible light communication , Power line communication
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/399299 , uj:33275 , Citation: Aboagye, S. et al. 2019. Design of energy efficient hybrid VLC/RF/PLC communication system for indoor networks.
- Description: Abstract: Integrating visible light communication (VLC) system with indoor radio frequency (RF) network is seen as a possible way of increasing the capacity and coverage of indoor networks. In such a hybrid network, the traffic generated at the indoor RF and VLC access points must be backhauled to the core network. Power line communication (PLC) technology is seen as a cost-effective backhaul (BH) solution due to its infrastructure availability in every home. In this letter, a novel system model that captures the joint effect of power and BH flow optimization for hybrid VLC/RF/PLC indoor communication network is proposed. For the proposed system model, the problem of energy efficiency (EE) maximization via power and BH flow optimization is formulated as a non-convex problem, and then transformed into a convex problem via the Dinkelbach’s approach. An energy efficient algorithm is proposed to solve this joint problem to optimality. Simulation results are used to verify the superiority of the proposed hybrid VLC/RF/PLC system and algorithm over a conventional indoor RF system and equal power allocation benchmark scheme, respectively, in terms of network throughput, power consumption, and EE.
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Machine to machine based on visible light communication
- Fon, Rodrique Chi, Ndjiongue, Alain R., Ouahada, Khmaies
- Authors: Fon, Rodrique Chi , Ndjiongue, Alain R. , Ouahada, Khmaies
- Date: 2020
- Subjects: Visible light communication , Machine-to-machine , Machine type communication
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/459608 , uj:40869 , Citation: Fon, R.C., Ndjiongue, A.R. & Ouahada, K. 2020. Machine to machine based on visible light communication.
- Description: Abstract: Machine-to-machine (M2M) visible light communication (VLC) is a communication architecture that makes it possible for heterogeneous devices to interact without human intervention using visible light modulated at certain frequency to enable communication. M2M VLC based is one of the feasible applications of internet of things (IoTs). This paper proposed a machine type communication (MTC) for M2M VLC based with an incorporation of energy harvesting system using a power transfer unit (PTU) with a centralized VLC access point (AP) with a probabilistic model, where an investigation is performed to the show the signal to noise ratio (SNR) distribution with a semi angle at half power of a chosen link. This is done is varying some particular parameters. This model takes in to account the channel analysis and light emitting diodes (LEDs) are place at the ceiling showing how bit rate can be effected for VLC AP with equal separation for a mobile devices or users. Such network aims at interconnecting billions of devices while investing the throughput performance of the M2M VLC based where a cluster of energy harvesting devices communicating with a VLC AP. This papers aim at proposing a design at the physical layer using various modulation scheme of modulation, demodulation, synchronization, LEDs-based analog transceiver devices and photo-detectors, error correction and so forth to ensure communication can be made to the internet. The method is implemented in simulation by considering the performance and flexibility of the system.
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- Authors: Fon, Rodrique Chi , Ndjiongue, Alain R. , Ouahada, Khmaies
- Date: 2020
- Subjects: Visible light communication , Machine-to-machine , Machine type communication
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/459608 , uj:40869 , Citation: Fon, R.C., Ndjiongue, A.R. & Ouahada, K. 2020. Machine to machine based on visible light communication.
- Description: Abstract: Machine-to-machine (M2M) visible light communication (VLC) is a communication architecture that makes it possible for heterogeneous devices to interact without human intervention using visible light modulated at certain frequency to enable communication. M2M VLC based is one of the feasible applications of internet of things (IoTs). This paper proposed a machine type communication (MTC) for M2M VLC based with an incorporation of energy harvesting system using a power transfer unit (PTU) with a centralized VLC access point (AP) with a probabilistic model, where an investigation is performed to the show the signal to noise ratio (SNR) distribution with a semi angle at half power of a chosen link. This is done is varying some particular parameters. This model takes in to account the channel analysis and light emitting diodes (LEDs) are place at the ceiling showing how bit rate can be effected for VLC AP with equal separation for a mobile devices or users. Such network aims at interconnecting billions of devices while investing the throughput performance of the M2M VLC based where a cluster of energy harvesting devices communicating with a VLC AP. This papers aim at proposing a design at the physical layer using various modulation scheme of modulation, demodulation, synchronization, LEDs-based analog transceiver devices and photo-detectors, error correction and so forth to ensure communication can be made to the internet. The method is implemented in simulation by considering the performance and flexibility of the system.
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