Evolutionary algorithm-based optimisation of the signal-to-noise ratio for indoor visible-light communication utilising white light-emitting diode

2012 ◽  
Vol 6 (6) ◽  
pp. 307-317 ◽  
Author(s):  
J.P. Ding ◽  
Y.F. Ji
Keyword(s):  
Visible Light ◽  
Evolutionary Algorithm ◽  
White Light ◽  
Signal To Noise Ratio ◽  
Light Emitting Diode ◽  
Visible Light Communication ◽  
Signal To Noise ◽  
Light Emitting ◽  
Noise Ratio

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.

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

scholarly journals An Optimization of the Signal-to-Noise Ratio Distribution of an Indoor Visible Light Communication System Based on the Conventional Layout Model

2020 ◽  
Vol 12 (21) ◽  
pp. 9006
Author(s):  
Xiangyang Zhang ◽  
Nan Zhao ◽  
Fadi Al-Turjman ◽  
Muhammad Bilal Khan ◽  
Xiaodong Yang
Keyword(s):  
Visible Light ◽  
Communication System ◽  
Signal To Noise Ratio ◽  
Visible Light Communication ◽  
Optimal Layout ◽  
Signal To Noise ◽  
Ratio Distribution ◽  
Channel Quality ◽  
Reflected Light ◽  
Noise Ratio

For an actual visible light communication system, it is necessary to consider the uniformity of indoor illumination. Most of the existing optimization schemes, however, do not consider the effect of the first reflected light, and do not conform to the practical application conventions, which increases the actual cost and the complexity of system construction. In this paper, considering the first reflected light and based on the conventional layout model and the classic indoor visible light communication model, a scheme using the parameter Q to determine the optimal layout of channel quality is proposed. We determined the layout, and then carried out a simulation. For comparison, the normal layout and the optimal layout of illumination were also simulated. The simulation results show that the illuminance distributions of the three layouts meet the standards of the International Organization for Standardization. The optimal layout of channel quality in the signal-to-noise ratio distribution, maximum delay spread distribution, and impulse response is obviously better than the optimal layout of illumination. In particular, the effective area percentage of the optimal layout of channel quality is increased by 0.32% and 6.08% to 88.80% as compared with the normal layout’s 88.48% and the optimal layout of illumination’s 82.72%. However, compared with the normal layout, the advantages are not very prominent.

scholarly journals Designing of an Indoor Visible Light Communication Transceiver for Data Transmission using White LED

2016 ◽  
Author(s):  
Ha Duyen Trung ◽  
Do Trong Tuan
Keyword(s):  
Visible Light ◽  
Signal To Noise Ratio ◽  
Light Emitting Diode ◽  
Image Transmission ◽  
Visible Light Communication ◽  
Symbol Error Rate ◽  
Data Rate ◽  
Full Duplex ◽  
Light Emitting ◽  
Environment Experiment

Abstract: In this paper, a prototype of full-duplex indoor  Visible  Light  Communication  (VLC) transceiver  is  designed  to  demonstrate  an  optical wireless  system  based  on  Universal  Serial  Bus (USB) port for data transmissions using white Light Emitting  Diode  (LED).  Based  on  VLC  technology, the  designed  system  consists  of  transmitters  and receivers can achieve data rate of 161.2 Kbps error free at the distance of 92 cm between two computers for  real-time  text  and  image  transmission  over indoor  environment.  Experiment  results  show  that for text transmission, symbol error rate (SER) does not  vary  data  rate  at  some  transmission  distances, whereas  for  image  transmission,  minimum  square error (MSE) and peak signal to noise ratio (PSNR) indicate  that  the  received  image  and  transmitted image were almost similar.

scholarly journals Optimization of signal-to-noise ratio for wireless light-emitting diode communication in modern lighting layouts

2014 ◽  
Vol 53 (4) ◽  
pp. 045103 ◽  
Author(s):  
Luqman A. Azizan ◽  
Mohammad S. Ab-Rahman ◽  
Mazen R. Hassan ◽  
A. Ashrif A. Bakar ◽  
Rosdiadee Nordin
Keyword(s):  
Signal To Noise Ratio ◽  
Light Emitting Diode ◽  
Signal To Noise ◽  
Light Emitting ◽  
Noise Ratio

scholarly journals Multi-User Precoder Designs for RGB Visible Light Communication Systems

Sensors ◽  
2020 ◽  
Vol 20 (23) ◽  
pp. 6836
Author(s):  
Roser Viñals ◽  
Olga Muñoz ◽  
Adrián Agustín ◽  
Josep Vidal
Keyword(s):  
Visible Light ◽  
White Light ◽  
Communication Systems ◽  
Light Emitting Diodes ◽  
Light Emission ◽  
Light Emitting Diode ◽  
Pulse Amplitude ◽  
Visible Light Communication ◽  
Light Emitting ◽  
Weighted Sum Rate

In this paper, we design linear precoders for the downlink of a visible light communication (VLC) system that simultaneously serves multiple users. Instead of using phosphor-coated white light-emitting diodes (PWLEDs), we focus on Red-Green-Blue light-emitting diodes (RGB-LEDs) that allow modulating three separate data streams on the three primary colors of the RGB-LEDs. For this system, we design a zero-forcing (ZF) precoder that maximizes the weighted sum rate for a multilevel pulse amplitude modulation (M-PAM). The precoding design in RGB-based systems presents some challenges due to the system constraints, such as the limited power, the non-negative amplitude constraints per light-emitting diode (LED), and the need to guarantee white light emission while transmitting with RGB-LEDs. For comparison purposes, we also consider the ZF design for a PWLED-based system and evaluate the performance of both a PWLED- and an RGB-based system.

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