scholarly journals Optical repeater for indoor visible light communication using amplify-forward method

2020 ◽  
Vol 20 (3) ◽  
pp. 1351
Author(s):  
Arsyad Ramadhan Darlis ◽  
Lucia Jambola ◽  
Lita Lidyawati ◽  
Adisty Hanny Asri
Keyword(s):  
Visible Light ◽  
Light Emitting Diode ◽  
Average Distance ◽  
Audio Signal ◽  
Visible Light Communication ◽  
Optical Amplifier ◽  
Electrical Signal ◽  
Signal Quality ◽  
Light Emitting ◽  
Good Signal

<p><span>In this paper, the implementation of an optical repeater for indoor visible light communication using the amplify-forward method was proposed. In indoor, Visible Light Communication (VLC) can occur by transmitting information signals from Lamps as a VLC transmitter toward the VLC receiver as Line-of-Sight (LOS) that is located with only a few meters. In the Non-LOS (NLOS) Communication, the signal will be attenuated, so it needs to amplify to improve good signal quality in a VLC receiver. The optical repeater could be used to improve the signal quality that attenuating due to distance. The audio signal was generated and sent using VLC Transmitter toward the Light Emitting Diode (LED). Then, the electrical signal was converted to become visible light, and it was amplified using an optical amplifier with an amplify-forward method. The signal in the form of visible light that had been amplified would be received by the Photodiode (PD), and the VLC Receiver processed it. The measurement results showed the system that used the optical repeater could improving the distance until 9.5 m with frequency 6000 Hz, where the best signal quality at a frequency of 3000 Hz.  The measurement result showed that the use of repeater components with the amplify forward method for VLC systems, especially in the room, can increase the range until 4.5 m compare without an optical repeater. This result exceeds the minimum distance of an indoor visible light communication system, with an average distance of the roof to the floor is 3.5 m.</span></p>

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.

Portable visible light communication transmitter and receiver using core-shell CdSe/ZnS quantum dots white light-emitting diode

2019 ◽  
Vol 13 (7) ◽  
pp. 873-878
Author(s):  
Ziwen Li ◽  
Dingke Xue ◽  
Dayong Liu ◽  
Yang Liu ◽  
Weilin Ye ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Visible Light ◽  
White Light ◽  
Light Emitting Diode ◽  
Visible Light Communication ◽  
Core Shell ◽  
Light Emitting
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