scholarly journals Transmission of Audio signals using Visible Light Communication via LEDs

2019 ◽  
Vol 8 (10) ◽  
pp. 2141-2146
Keyword(s):  
Visible Light ◽  
Light Emitting Diode ◽  
Visible Light Communication ◽  
Original Data ◽  
Wireless Channel ◽  
Audio Signals ◽  
Light Spectrum ◽  
Light Emitting ◽  
Optical Signals ◽  
Radio Frequency Spectrum

With the episodic increase of advancement in technology, wireless communication has become the need of the hour. The rate at which the use of wireless technology is being developed is tremendous. However, with the increase in usage, there has been unfortunately an increase in network complexity. In order to resolve the crisis of radio frequency spectrum, a newly developed technology has been proposed. This technology has been coined as Li-Fi: Light Fidelity. It is a technology, based on Visible Light Communication, which is used to transmit signals and data from one system to another with the help of a Led. The paper proposes a transmission system which will be responsible for transmitting audio signals from one system to another with the help of Li-Fi. Here a light emitting diode acts as the Li-Fi transmitter and photodiode acting as a Li-Fi receiver.The spontaneous switching of the Led enables propagation of signals through a wireless channel and is picked up by the receiving photodiode. The photodiode adhering to its functiontransforms the optical signals into electrical signals and therefore original data is retrieved and transferred. Additionally, with proposition to the system, a comparative study has been delineated with the already existing system.The existing system of networking and communications involve Wi-fi. The emergence and usage of Li-fi is necessary because it offers a substantially similar user experience to Wi-Fi except using the light spectrum. It is essential as it will able to meet up the connectivity demands of future as it is able to unlock unprecedented data and bandwidth.

scholarly journals Realization of a Secure Visible Light Communication System via Chaos Synchronization

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Teh-Lu Liao ◽  
Chih-Yung Chen ◽  
Hsin-Chieh Chen ◽  
Yung-Yi Chen ◽  
Yi-You Hou
Keyword(s):  
Visible Light ◽  
Light Transmission ◽  
Light Emitting Diode ◽  
Digital Signal ◽  
Visible Light Communication ◽  
Audio Signals ◽  
Light Emitting ◽  
Straight Line ◽  
Data Transmission Security ◽  
To Receive

A novel technique for transmission of information through visible light communication (VLC) is developed in this study. A light-emitting diode is used as the light source at the transmitting side to send the encrypted information. At the receiving side, a light sensor, OPT-101, is used to receive the light signals that carry the encrypted information. The Arduino Due microcontroller board is used for digital signal processing at both the transmitting and receiving sides. Furthermore, to prevent the transmitted message from being intercepted, two chaotic systems, a master and a slave, with a synchronization controller are designed to obtain the transmitted audio signals. The design enables not only a VLC system with the light transmission path as a straight line (so that data cannot be stolen) but also the encryption of the audio signals with the chaotic system (Rössler system) to enhance data transmission security. The effectiveness of this system is then experimentally verified.

Long-Distance Visible Light Communication Based on Light Emitting Diode Source

2017 ◽  
Vol 54 (5) ◽  
pp. 050602
Author(s):  
张宇飞 Zhang Yufei ◽  
张洪明 Zhang Hongming ◽  
王鹏 Wang Peng ◽  
刘涛 Liu Tao ◽  
孙德栋 Sun Dedong ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Emitting Diode ◽  
Visible Light Communication ◽  
Long Distance ◽  
Light Emitting

scholarly journals A Full-Duplex LED-to-LED Visible Light Communication System

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1713
Author(s):  
Hyunwoo Jung ◽  
Sung-Man Kim
Keyword(s):  
Visible Light ◽  
Bit Error Rate ◽  
Error Rate ◽  
Signal To Noise Ratio ◽  
Light Emitting Diode ◽  
Visible Light Communication ◽  
Full Duplex ◽  
Signal To Noise ◽  
Light Emitting ◽  
Half Duplex

We experimentally demonstrated full-duplex light-emitting diode (LED)-to-LED visible light communication (VLC) using LEDs as the transmitter and receiver. Firstly, we investigated the performance dependency on the wavelengths of the LED transmitter and receiver by measuring the rise time and signal-to-noise ratio (SNR). Through the investigation, we were able to choose the optimal LED color set for LED-to-LED VLC using Shannon’s channel capacity law. The bit error rate (BER) results of full-duplex and half-duplex LED-to-LED VLC systems with the optimal LED sets are shown to compare the performance. Furthermore, we discuss major distortions and signal losses in the full-duplex LED-to-LED VLC system.

scholarly journals Usage of Light-Emitting Diode Lighting and Visible Light Communication Technology for Temperature Control

2021 ◽  
Vol 18 (4) ◽  
pp. 7-24
Author(s):  
Svetlana Grigoryeva ◽  
Alexander Baklanov ◽  
Aslima Alimkhanova ◽  
Alexander Dmitriev ◽  
György Györök
Keyword(s):  
Visible Light ◽  
Communication Technology ◽  
Temperature Control ◽  
Light Emitting Diode ◽  
Visible Light Communication ◽  
Light Emitting

scholarly journals Performance Analysis of Software-Defined PHY-I Visible Light Communication System

2021 ◽  
Author(s):  
Uğur Bekçibaşı ◽  
Kubilay TASDELEN
Keyword(s):  
Visible Light ◽  
Light Emitting Diode ◽  
Visible Light Communication ◽  
Physical Layer ◽  
Performance Measurements ◽  
Media Access ◽  
Current Standard ◽  
Medium Access ◽  
Light Emitting ◽  
Symbol Detection

Abstract Visible Light Communication (VLC) is an up-to-date issue where Light Emitting Diode (LED) is used for lighting and data transmission. Although interest in Visible Light Communication has increased in current academic studies, the devices ready for commercial use are still lacking. In this study, the system design of semi-software-based visible light communication which is designed to work in Layer 1 of the IEEE 802.15.7-2011 standard is presented and its performance under different conditions is investigated. Designed on an embedded Linux platform, where LED lights are used as transmitter and photodiode as a receiver, the system can supply the workload of the current standard at basic speeds with a basic physical layer, media access principles, and protocol support. In the structure, software and hardware are designed, which include basic principles such as signal sampling, symbol detection, encoding/decoding in the Physical layer of the OSI network model (PHY), and Medium Access Control (MAC). Low and high-power LEDs as transmitters and photodiodes as receivers are built on BeagleBone Black (BBB), a System on a Chip (SoC) platform. For performance measurements, the measurement results of variables such as ambient brightness, communication distance, ultraviolet (UV) - Polarizer - Neutral Density (ND) filters, and data load are presented.

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