Experimental Evaluation of Unipolar OFDM VLC System on Software Defined Platform

Aly, Bassam; Elamassie, Mohammed; Uysal, Murat; Kinav, Emrah

doi:10.1109/contel.2019.8848539

Cited by 7 publications

(5 citation statements)

References 16 publications

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“…Unipolar OFDM (U-OFDM) stands out with its better error rate performance, where each time sample is encoded into a pair of new time samples [47]. In terms of spectrum efficiency and error performance, it is equivalent to ACO-OFDM [46].…”

Section: U-ofdmmentioning

confidence: 99%

Integrating Wireless Sensor Network with Li-Fi Wireless Communication Technology based on NOMA Technique: A Survey

M.Shenoda

Abd-Elazez

Abdel-Kader

et al. 2022

Benha Journal of Applied Sciences

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Li-Fi stands for Light-Fidelity, is a creating department of Optical Wireless Communication (OWC) that gives more noteworthy information transmission using obvious light as a medium rather than conventional radio frequency electromagnetic radiation with the ability to employ surplus users since it uses a wide range of spectrum bandwidth. Recently the implementation of wireless sensors has been increased in the design of high-performance buildings. On the other side, the main challenge in using Wireless Sensor Systems (WSNs) is that the sensor nodes have restricted power in their essential power capacity unit, this power may be rapidly exhausted in case the sensor node remains operational for extended periods of time also data transmission is a significant challenge in WSNs. Non-Orthogonal Multiple Access (NOMA) is a novel encoding technique proposed for next-generation wireless communications. NOMA may send many symbols utilizing the same time, frequency and coding resource but dividing them in the power domain and differentiating them based on the various power levels of distinct symbols, which are subsequently demultiplexed at the receiver using an interference cancellation approach. Since the main requirement of WSNs are high connection, low latency, energy savings, and ultra-high data rates, we give an overview of Li-Fi technology and a study of its performance over WSNs aided by the NOMA technique in this survey article.

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Section: U-ofdmmentioning

confidence: 99%

Integrating Wireless Sensor Network with Li-Fi Wireless Communication Technology based on NOMA Technique: A Survey

M.Shenoda

Abd-Elazez

Abdel-Kader

et al. 2022

Benha Journal of Applied Sciences

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“…The approach considered by the authors to avoid mistiming issue consists in oversampling. In [22] the authors implement a unidirectional VLC platform and demonstrate the OFDM implementation.…”

Section: B Goals and Organization Of The Workmentioning

confidence: 99%

Adaptive Modulation Control for Visible Light Communication Systems

Costanzo

Loscrì

Biagi

2021

J. Lightwave Technol.

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Visible light communication (VLC) builds on the dual use of lightening infrastructure for communication. Even though the advantages of VLC are well known, as emerging communication paradigm, some open issues still need to be addressed in order to rely on it as a robust communication system. First of all, external interference as an extremely varying signal impacting on the reliability of the VLC system needs to be analyzed. In this paper, we propose a system where the link conditions (in terms of signal-to-noise-ratio (SNR)) drive the modulation scheme and this procedure is managed through the use of an uplink/channel, to assure a feedback path. The receiver is in charge of choosing the modulation scheme matching the requirement in terms of error rate on the basis of the measured SNR after noise mitigation. The feasibility of the system and its effectiveness are evaluated by designing and implementing a complete bi-directional system. In particular, an uplink channel sending the information regarding the specific selected modulation technique has been implemented and the whole system is based on a fine synchronization approach in order to "track" in real time the most suitable modulation scheme. Experimental results show the effectiveness of a bi-directional system in order to implement an adaptive VLC system able to follow the environmental changes (in terms of interference and noise).

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“…After symbol timing, frame detection is performed in order to resolve multiple symbol period delays [15]. The training sequence for frame detection consists of ones and zeros.…”

Section: Practical Implementation Aspectsmentioning

confidence: 99%

“…6, we present SNR and BER performance versus distance. We assume LOS scenario with strict alignment where d varies between 1 m and 3 m with a step size of 0.5 m. The estimate of SNR is obtained based on (16) in conjunction with (14) and (15) where noise power and effective channel are estimated. In Fig.…”

Section: Lzeros I=1mentioning

confidence: 99%

Experimental Evaluation of a Software Defined Visible Light Communication System

Aly

Elamassie

Kebapci

et al. 2020

2020 IEEE International Conference on Communications Workshops (ICC Workshops)

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Visible light communication (VLC) allows the dual use of light-emitting diodes (LEDs) for illumination and communication purposes. With its large bandwidth and immunity to electromagnetic interference, VLC can be used as complementary and/or alternative to radio communications. In this paper, we present a comprehensive experimental evaluation of a softwaredefined VLC system with on-off keying for both line-of-sight (LOS) and non-line-of-sight (NLOS) scenarios. The experimental set-up is based on a pair of modified National Instruments USRPs coupled with a custom design front-end. In the measurement campaign, we vary the distance between 1 to 3 meters with a step size of 0.5 m. For each point in this LOS scenario, we measure signal-to-noise ratio (SNR) and bit error rate (BER) with and without a lens. We also evaluate the effect of the reception angle (i.e, no strict alignment) on system performance. We further evaluate the SNR performance for NLOS scenarios and demonstrate a robust performance due to the wide field-ofview of the front-end.

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Experimental Evaluation of Unipolar OFDM VLC System on Software Defined Platform

Cited by 7 publications

References 16 publications

Integrating Wireless Sensor Network with Li-Fi Wireless Communication Technology based on NOMA Technique: A Survey

Integrating Wireless Sensor Network with Li-Fi Wireless Communication Technology based on NOMA Technique: A Survey

Adaptive Modulation Control for Visible Light Communication Systems

Experimental Evaluation of a Software Defined Visible Light Communication System

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