scholarly journals Visible-Light Communications Using a CMOS-Controlled Micro-Light- Emitting-Diode Array

2012 ◽  
Vol 30 (1) ◽  
pp. 61-67 ◽  
Author(s):  
Jonathan J. D. McKendry ◽  
David Massoubre ◽  
Shuailong Zhang ◽  
Bruce R. Rae ◽  
Richard P. Green ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Emitting Diode ◽  
Diode Array ◽  
Visible Light Communications ◽  
Light Emitting

High-Speed Visible Light Communications Using Individual Pixels in a Micro Light-Emitting Diode Array

2010 ◽  
Vol 22 (18) ◽  
pp. 1346-1348 ◽  
Author(s):  
Jonathan J. D. McKendry ◽  
Richard P. Green ◽  
A. E. Kelly ◽  
Zheng Gong ◽  
Benoit Guilhabert ◽  
...  
Keyword(s):  
Visible Light ◽  
High Speed ◽  
Light Emitting Diode ◽  
Diode Array ◽  
Visible Light Communications ◽  
Light Emitting

scholarly journals Secrecy Dimming Capacity in Multi-LED PAM-Based Visible Light Communications

2017 ◽  
Vol 2017 ◽  
pp. 1-6
Author(s):  
Byung Wook Kim
Keyword(s):  
Visible Light ◽  
Light Emitting Diode ◽  
Mobile Network ◽  
Pulse Amplitude ◽  
Visible Light Communication ◽  
Security And Privacy ◽  
Visible Light Communications ◽  
Light Emitting ◽  
Secure Transmission ◽  
Transmission Ability

Recently, mobile cloud computing (MCC) has gained a lot of interest for researchers building the next-generation mobile applications. Because unauthorized access may cause serious problems, security and privacy with MCC have become significant issues. This paper addresses the secrecy dimming capacity of secure transmission in MCC over visible light communication (VLC) channels. By obtaining the entropy-maximizing symbol probability of multiple light emitting diode- (LED-) based pulse amplitude modulation (PAM), mathematical analysis of the secrecy dimming capacity of VLC was derived. Simulation results show that the secure transmission ability of multi-LED-based VLC is determined according to the number of activated LEDs and target dimming level. This can be a guideline for practical VLC-based mobile network designers intending to secure wireless transmission and to decide on the number of activated LEDs at target dimming level to operate.

GaN-based mid-power flip-chip light-emitting diode with high −3  dB bandwidth for visible light communications

2018 ◽  
Vol 57 (11) ◽  
pp. 2773 ◽  
Author(s):  
Zheng Zhou ◽  
Bing Yan ◽  
Xuejin Ma ◽  
Dongdong Teng ◽  
Lilin Liu ◽  
...  
Keyword(s):  
Visible Light ◽  
Flip Chip ◽  
Light Emitting Diode ◽  
Visible Light Communications ◽  
Light Emitting

scholarly journals Visible light communications: real time 10 Mb/s link with a low bandwidth polymer light-emitting diode

2014 ◽  
Vol 22 (3) ◽  
pp. 2830 ◽  
Author(s):  
Paul Anthony Haigh ◽  
Francesco Bausi ◽  
Zabih Ghassemlooy ◽  
Ioannis Papakonstantinou ◽  
Hoa Le Minh ◽  
...  
Keyword(s):  
Visible Light ◽  
Real Time ◽  
Light Emitting Diode ◽  
Visible Light Communications ◽  
Light Emitting ◽  
Polymer Light Emitting Diode

scholarly journals Optical Filter-Less WDM for Visible Light Communications Using Defocused MIMO

Electronics ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 1065
Author(s):  
Andrew Burton ◽  
Petr Chvojka ◽  
Paul Anthony Haigh ◽  
Zabih Ghassemlooy ◽  
Stanislav Zvanovec
Keyword(s):  
Visible Light ◽  
Wavelength Division Multiplexing ◽  
Light Emitting Diode ◽  
Multiple Input Multiple Output ◽  
Optical Filter ◽  
Spatial Diversity ◽  
Visible Light Communications ◽  
Light Emitting ◽  
Photodetector Array ◽  
The Individual

This paper experimentally investigates, for the first time, a new wavelength-division multiplexing-based visible light communications link based on a defocused non-imaging multiple-input multiple-output (MIMO), which removes the need for tuned optical bandpass filters paired with each receiver. The proposed system is based on using the natural diversity of the individual light emitting diodes (LEDs) within a single light source to generate an H-matrix, which is independent of spatial diversity. We show that, by transmitting K-independent sets of non-return to zero on-and-off keying signals on separate wavelengths, the received superposed symbols can be demultiplexed. The non-imaging MIMO diversity is achieved by considering the power-current characteristics of the light emitting diode, the responsivity of the photodetector array, and the defocused beam spot. The system is empirically verified for K = 3 using red, green, and blue LEDs with Q-factors of 7.66, 7.69, and 4.75 dB, respectively.

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