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 Practical Aspects of Physical and MAC Layer Security in Visible Light Communication Systems

2016 ◽  
Vol 62 (1) ◽  
pp. 7-13 ◽  
Author(s):  
Grzegorz J. Blinowski
Keyword(s):  
Visible Light ◽  
Secure Communication ◽  
Communication Systems ◽  
Communication Channel ◽  
Visible Light Communication ◽  
Physical Characteristics ◽  
Personal Area Networks ◽  
Signal Jamming ◽  
Communication Method ◽  
Programmable Devices

Abstract Visible light communication (VLC) has been recently proposed as an alternative standard to radio-based wireless networks. Originally developed as a physical media for PANs (Personal area Networks) it evolved into universal WLAN technology with a capability to transport internet suite of network and application level protocols. Because of its physical characteristics, and in line with the slogan "what you see is what you send", VLC is considered a secure communication method. In this work we focus on security aspects of VLC communication, starting from basic physical characteristics of the communication channel. We analyze the risks of signal jamming, data snooping and data modification. We also discuss MAC-level security mechanisms as defined in the IEEE 802.15.7 standard. This paper is an extension of work originally reported in Proceedings of the 13th IFAC and IEEE Conference on Programmable Devices and Embedded Systems - PDES 2015

scholarly journals Effects of Optical Beams on MIMO Visible Light Communication Channel Characteristics

Sensors ◽  
2021 ◽  
Vol 22 (1) ◽  
pp. 216
Author(s):  
Jupeng Ding ◽  
Chih-Lin I ◽  
Jintao Wang ◽  
Hui Yang
Keyword(s):  
Visible Light ◽  
Communication Channel ◽  
Channel Model ◽  
Visible Light Communication ◽  
Output Channel ◽  
Transmission Performance ◽  
Response Characteristics ◽  
Channel Characteristics ◽  
Channel Frequency Response ◽  
Frequency Response Characteristics

Under 5G envision, for pushing visible light communication (VLC) channel model evolution to various non-Lambertian beams, this paper introduces the typical commercial non-Lambertian beams, such as Luxeon rebel and side emitter, into the conventional analytical VLC channel model. The numerical results illustrate that the non-Lambertian beams can significantly affect the VLC channel frequency response characteristics. Compared with the traditional Lambertian beam, Side Emitter optical beam could naturally bring up to about 56.8% VLC multi input multi output channel capacity deviation, which objectively opens a new discussion dimension for enhancing VLC transmission 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
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