Abstract
Abstract Free space optical communication is a potential technology that exploits the visible light frequency band for communication. In this paper, a free-space optical link (FSOL) optimization in visible light communication (VLC) is used to improve the channel performance for signal strength and analyze the effect of signal failures in a communication system. The data transmission and reception phenomenon are established using a light-emitting diode (LED) as a carrier at transmitter and photodiode as a detector at the receiver, respectively. The OptiSystem tool uses to optimize the component parameters of this proposed communication system. The bit error rate (BER) analyzer displays the signals as an eye diagram with the challenges of components uncertainty for better signal performance. The optimized components solve the problem encountered transmitting improve and enhance the signals strength. The acceptable eye diagram displayed from the BER analyzer has been resolved as a result of component optimizations by adding and removing noise to ascertain the behavior of the channel. A better signal retrieve by the display of the acceptable eye diagram from the OptiSystem software used. The FSOL components optimization improve the loss of data, weak signal, loss of power, signal failure, and signal errors which guarantee multi-mobile users with the shared signal. OptiSystem software package used to fully characterize the FSOL system.
Highlights
The development of new technology in optics system has been extended to research on the quality of signal performance in a given channel for visible light communication (VLC) systems
We have successfully modelled a free-space optical link using OptiSystem software for an improved signal performance which displays an acceptable eye diagram using bit error rate (BER) analyser
Mach-Zehnder modulator is used to modulate the incoming bits from the light emitting diode (LED); the FSO channel is used as a medium of transmission which decides the maximum and minimum range to display the acceptable eye diagram performance within the system
Summary
Free space optical communication (FSOC) transmits data through lighting in a communication set-up. Researchers have studied and evaluate the performance of a special technique used to receive signal in FSO transmission in [16]. OptiSystem software is a simulation tool for testing, designing, and optimization of optical link using different components and equipment to visualize optical transmission for analysis [31]. We have carefully designed, tested and simulated an FSO Link in VLC using OptiSystem software. The author's contribution to this paper is summarized as follows: We have successfully modelled a free-space optical link using OptiSystem software for an improved signal performance which displays an acceptable eye diagram using BER analyser. The FSOL comprises of the optical carrier (LED), modulator, FSOC link, optical amplifier, optical receiver (photodetector), demodulator, low pass filter and BER analyzer. The data signal transmitted has an electrical signal in the form of 1’ and 0’s that is the form of a pseudorandom binary bit sequence and non-return to zero coding standards
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