Browsing by Author "Meraihi, Y."

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    Analysis of communication distance and energy harvesting for vehicular VLC using commercial taillights
    (IEEE, 2023) Refas, S.; Acheli, D.; Yahia, S.; Meraihi, Y.; Eldeeb, Hossıen Badr; Dac Ho, T.; Jiang, L.; Shimamoto, S.; Electrical & Electronics Engineering; ELDEEB, Hossien Badr Hossien
    This paper presents an investigation into the communication range and energy harvesting capabilities of a vehicle-to-vehicle (V2V) visible light communication (VLC) system that utilizes commercial taillights (TLs) as wireless transmitters and a single photodetector (PD) as the wireless receiver. First, We derived a closed-form expression for the distance and the harvested energy using realistic ray-tracing channel models that consider the asymmetrical pattern of commercial car taillights. Then, analyze the impact of various transceivers and system parameters on the overall performance of the V2V VLC system. Our findings demonstrated that the proposed V2V VLC system could achieve a communication range of more than 50 m at a BER threshold of 10-3 for low data rate applications (i.e., safety) and more than 30 m for higher data rate application at same BER target. Our results further reveal that an energy harvesting of 4.5 mJ can be achieved when the BER performance is kept at 10-6, making it a promising solution for low-power wireless communication in V2V VLC scenarios. Moreover, the results have shown that the harvested energy can be affected by parameters such as the BER, bandwidth, and electrical transmitting power, which emphasizes the importance of optimizing these parameters for optimal harvesting energy. Overall, this paper provides valuable insights into the potential of V2V VLC systems for energy-efficient communication in vehicular communications
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    Performance analysis of multi-hop V2V VLC system under atmospheric weather conditions
    (IEEE, 2022) Refas, S.; Acheli, D.; Yahia, S.; Meraihi, Y.; Ramdane-Cherif, A.; Benmessaoud Gabis, A.; Eldeeb, Hossıen Badr; Eldeeb, Hossıen Badr
    The reliability of vehicle-to-vehicle (V2V) visible light communication (VLC) systems is affected by several environmental factors. These include the availability of the direct communication link, the transmit power budget, the required communication quality and speed, and the atmospheric weather conditions. This encourages the usage of multi-hop relay systems. In which, the intermediate vehicles operate as wireless relays, receiving the signal from the source vehicle, decoding it, and re-transmitting it to the next vehicle until it reaches the destination vehicle. In this paper, we analyze the performance of multi-hop V2V VLC systems through the derivation of the maximum achievable communication distance and utilizing a realistic ray tracing channel modeling approach. The effects of the transceiver, system parameters, and weather conditions on the V2V VLC system performance are also investigated. Our results demonstrate that the foggy weather with low visibility has a severe impact on the V2V system performance, the transmission range is reduced by about 40 m comparing to the clear weather assuming the single transmission link. The results further reveal that deploying the inter-mediate vehicles as multi-hop relays has the ability to extend the transmission ranges, i.e., for only one hop relay, the maximum distance climbs by more than 50 m in the worst weather case.
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    Performance study and analysis of MIMO visible light communication-based V2V systems
    (Springer, 2022-09) Yahia, S.; Meraihi, Y.; Refas, S.; Gabis, A. B.; Ramdane-Cherif, A.; Eldeeb, Hossien Badr Hossien; Eldeeb, Hossien Badr Hossien
    Vehicular Visible Light Communication (VLC) has recently attracted much interest from researchers and scientists. This technology enables the connectivity between the vehicles and the infrastructures along the road utilizing the Lighting-Emitting-Diodes based vehicle HeadLights (HLs) and TailLights (TLs) as wireless transmitters. This paper investigates the performance of a Vehicle-to-Vehicle VLC system using a Multiple-Input Multiple-Output (MIMO) scheme. Specifically, we establish the MIMO transmission system by using the two HLs of the source vehicle as wireless transmitters and multiple receivers (RXs) installed at the rear of the destination vehicle as wireless receivers. We consider different numbers of RXs, which result in various MIMO configurations, i.e., 2 × 2 , 2 × 3 , and 2 × 4. We conduct a channel modeling study based on the non-sequential ray-tracing capabilities of the OpticStudio software to obtain the optical channel gain, considering the possibility of both horizontal and vertical displacement between vehicles. We then explore the contribution of each RX in the total received power. In addition, we investigate the effect of weather conditions, modulation orders, and artificial light sources on the bit error rate (BER) performance of the considered MIMO configurations. The obtained results demonstrate that deploying the MIMO with higher orders can significantly enhance the system performance, particularly when there is a lateral shift between the two cars. It has been drawn from our results that the required SNR to achieve a BER of 10- 4 reduces by 6 dB when 2 × 4 MIMO configuration is deployed compared to the 2 × 2 MIMO configuration.