Excess signal transmission with dimming control pattern in indoor visible light communication systems

2014 ◽  
Author(s):  
Jian Chen ◽  
Xiaodi You ◽  
Huanhuan Zheng ◽  
Changyuan Yu
Keyword(s):  
Visible Light ◽  
Communication Systems ◽  
Signal Transmission ◽  
Visible Light Communication ◽  
Control Pattern ◽  
Dimming Control

scholarly journals Visible Light Communication Channel Models and Simulation of Coal Workface Energy Coupling

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Yanrong Zhai ◽  
Shen Zhang
Keyword(s):  
Visible Light ◽  
Communication Systems ◽  
Communication Channel ◽  
Channel Model ◽  
Coal Dust ◽  
Signal Transmission ◽  
Energy Coupling ◽  
Mathematic Model ◽  
Visible Light Communication ◽  
Optical Signal

Due to their low energy consumption and small size, visible light communication systems have been widely used to eliminate communication-blind areas in coal workfaces. A workface visible light communication channel model and a mathematic model of energy coupling from the mining machine’s workspace to its footpath were established to investigate the characteristics of optical signal transmission on the workface. This paper studies the effects of coal dust (double-layer particles encapsulated by moisture) on optical signal degradation. Simulation results revealed the presence of an optimized transmitter location, which maximized the coupled energy of the two space signals due to the blocking effect of metal columns.

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.

scholarly journals An Enhanced DCO-OFDM Scheme for Dimming Control in Visible Light Communication Systems

2016 ◽  
Vol 8 (3) ◽  
pp. 1-13 ◽  
Author(s):  
Yang Yang ◽  
Zhimin Zeng ◽  
Julian Cheng ◽  
Caili Guo
Keyword(s):  
Visible Light ◽  
Communication Systems ◽  
Visible Light Communication ◽  
Dimming Control

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

A CDMA system implementation with dimming control for visible light communication

2018 ◽  
Vol 412 ◽  
pp. 172-177 ◽  
Author(s):  
Danyang Chen ◽  
Jianping Wang ◽  
Jianli Jin ◽  
Huimin Lu ◽  
Lifang Feng
Keyword(s):  
Visible Light ◽  
Visible Light Communication ◽  
Cdma System ◽  
System Implementation ◽  
Dimming Control
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