Joint brightness control and data transmission for visible light communication systems based on white LEDs

2011 ◽  
Author(s):  
Abu Bakar Siddique ◽  
Muhammad Tahir
Keyword(s):  
Visible Light ◽  
Data Transmission ◽  
Communication Systems ◽  
Visible Light Communication ◽  
White Leds

scholarly journals A Sallen Key All Pass Filter for Noise Reduction in Visible Light Communication Systems

2019 ◽  
Vol 8 (6) ◽  
pp. 1335-1341
Keyword(s):  
Visible Light ◽  
Data Transmission ◽  
Communication Systems ◽  
Visible Light Communication ◽  
Wireless Channel ◽  
Pass Band ◽  
Ambient Light ◽  
Optical Wireless ◽  
Pass Filter ◽  
Red Led

Visible-light communication (VLC) uses a solid-state illumination device for generating high speed communication links. VLC is used throughout world for eliminating the shortage of wireless spectrum resources. The VLC is generally an Optical Wireless Communication (OWC) method and this uses the Light Emitting Diode (LED) for data transmission through the optical wireless channel. The data transmission though the VLC is affected by ambient light interference due to the environment. In this paper, an efficient filter is designed to eliminate the ambient light noises from the received signal. The filter used in the VLC system is Sallen key All Pass Filter (APF) and the red LED and Photo detector (PD) is used in the transmitter and receiver respectively. The Sallen key APF contains three different filter structures such as low pass, band pass and high pass filter. The Sallen APF uses the filter process with respect to the noise. This proposed system is implemented in two different tools namely MATLAB and Electric VLSI. The performance of the proposed system is analyzed in terms of Bit Error Rate (BER), area, power consumption and data rate.

scholarly journals Parallel Data Transmission in Indoor Visible Light Communication Systems

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 1126-1138 ◽  
Author(s):  
Safwan Hafeedh Younus ◽  
Aubida A. Al-Hameed ◽  
Ahmed Taha Hussein ◽  
Mohammed Thamer Alresheedi ◽  
Jaafar M. H. Elmirghani
Keyword(s):  
Visible Light ◽  
Data Transmission ◽  
Communication Systems ◽  
Visible Light Communication ◽  
Parallel Data

scholarly journals Joint Error-Dimming Control Using Constant Weight Coding in Visible Light Communication Systems

2018 ◽  
Vol 173 ◽  
pp. 02019
Author(s):  
Yu Zuo ◽  
Jian Zhang
Keyword(s):  
Visible Light ◽  
Data Transmission ◽  
Communication Systems ◽  
Hamming Distance ◽  
Visible Light Communication ◽  
Reliable Data ◽  
Error Performance ◽  
Constant Weight ◽  
Constant Weight Code ◽  
Dimming Control

To enhance commercial implementation, visible light communication (VLC) should facilitate dimming control and reliable data transmission simultaneously, where users can adjust the brightness levels arbitrarily. Constant weight code (CWC) based dimming method can achieve higher spectral efficiency, but the codewords need further selection to exponentially map the massage. In this paper, based on CWC, we proposed a method to achieve dimming control as well as improve error performance via optimizing the average Hamming distance of the codeword set. Simulation results show that the optimal codeword set can achieve better error performance.

OFFSET MODULATION FOR VISIBLE LIGHT COMMUNICATION SYSTEMS

2019 ◽  
Vol 78 (13) ◽  
pp. 1213-1222
Author(s):  
A. A. Abdulkafi ◽  
S. M. Hardan ◽  
M. K. Hussein ◽  
Ibrahim K. Sileh
Keyword(s):  
Visible Light ◽  
Communication Systems ◽  
Visible Light Communication

Multi-band transmission color filters for multi-color white LEDs based visible light communication

2017 ◽  
Vol 403 ◽  
pp. 330-334 ◽  
Author(s):  
Qixia Wang ◽  
Zhendong Zhu ◽  
Huarong Gu ◽  
Mengzhu Chen ◽  
Qiaofeng Tan
Keyword(s):  
Visible Light ◽  
Visible Light Communication ◽  
White Leds ◽  
Color Filters ◽  
Multi Band
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