scholarly journals Experimental validation of a three‐dimensional modulation format for data transmission in RGB visible light communication systems

2020 ◽  
Author(s):  
Jose L. Henao Rios ◽  
Neil Guerrero González ◽  
Moisés R. N. Ribeiro ◽  
Jair A. L. Silva
Keyword(s):  
Visible Light ◽  
Data Transmission ◽  
Communication Systems ◽  
Experimental Validation ◽  
Three Dimensional ◽  
Visible Light Communication ◽  
Modulation Format

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 Spin-Selected Dual-Wavelength Plasmonic Metalenses

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 761 ◽  
Author(s):  
Wei Wang ◽  
Zehan Zhao ◽  
Chong Guo ◽  
Kai Guo ◽  
Zhongyi Guo
Keyword(s):  
Visible Light ◽  
Data Transmission ◽  
Three Dimensional ◽  
Optical Fiber Communication ◽  
Visible Light Communication ◽  
Dual Wavelength ◽  
Spin States ◽  
Focal Points ◽  
Fiber Communication ◽  
Circularly Polarized

Several novel spin-selected dual-wavelength metalenses have been proposed and investigated based on the plasmonic metasurface consisting of two kinds of rotary rectangle gap nanoantennas (RGN), which are designed based on merging two or four polarity-inverse lenses corresponding to different wavelengths (765 and 1300 nm). The spin-selected dual-wavelength metalenses with two similar and two different vertical and lateral focal points have also been proposed respectively, which can focus two wavelengths with inverse spin states to arbitrary special positions. The three-dimensional metalens with four focal points have also been proposed, which can focus four beams with inverse spin states and different wavelengths to preset positions. Moreover, a spin-dependent achromatic metalens has also been proposed, which can focus left circularly polarized (LCP) incidence with different wavelengths to the same position. Our work opens up new avenues toward establishing novel spin-selected and wavelength-selected metadevices, and is significant for the development of spin-controlled photonics and particles manipulation. In addition, it provides a new idea for solving the problem of data transmission from optical fiber communication to visible light communication.

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 Characterization of Light-To-Frequency Converter for Visible Light Communication Systems

Electronics ◽  
2018 ◽  
Vol 7 (9) ◽  
pp. 165 ◽  
Author(s):  
Roger Martínez Ciro ◽  
Francisco López Giraldo ◽  
Andrés Betancur Perez ◽  
Martín Luna Rivera
Keyword(s):  
Visible Light ◽  
Communication Systems ◽  
Signal To Noise Ratio ◽  
Frequency Converter ◽  
Optical Power ◽  
Visible Light Communication ◽  
Periodic Signal ◽  
Maximum Output ◽  
Analog To Digital ◽  
Modulation Format

PIN (positive intrinsic negative) photodiodes and analog-to-digital converters (ADC) are commonly used on visible light communication (VLC) receivers in order to retrieve the data on detected signals. In this paper, a visible light communication receiver based on a light to frequency converter (LTF) is proposed. We characterized the LTF and derived an equation for signal-to-noise ratio (SNR) estimation in terms of its input optical power, and the frequency of the output periodic signal. The experiments show that the periodic signal of the LTF converter has a maximum output frequency of 600 kHz at a distance of 6.2 cm. In this setup, measured SNR reached 18.75 dB, while the lowest obtained SNR with 1.1 m length was roughly −35.1 dB. The results obtained suggest that a bit rate of 150 kbps can be achieved with an on-off keying (OOK) modulation format. We analyzed the results and discuss the advantages and limitations of the LTF converter for optical wireless communication purposes.

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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