Indian Journal of Science and Technology

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The ­visible Light Communications (VLC) has gained a lot of interest for indoor communications resulting in several research challenges. The use of Light Emitting Diodes (LEDs) as light source poses many modulation issues for Line Of Sight (LOS) Optical Wireless Channel (OWC). This paper investigates the line of sight optical wireless channel characterization for visible light communications designing a realistic indoor environment adding path loss along with Additive White Gaussian Noise (AWGN) to the channel. A comprehensive mathematical model is derived and simulated to investigate the performance of the proposed system considering the effect of different parameters such as Eb/No, Signal to Noise Ratio (SNR), distance between transmitter and receiver, signal power on the Bit Error Rate (BER), propagation delay, and spectral efficiency. The propose indoor OWC for VLC enhances the transmission range from 4 meters to 6 meters having optimal quality of transmission in a channel representing real indoor environment.  


Keywords

Visible Light Communications (VLC); Optical Wireless Chanel (OWC); Line of Sight (LoS) and AWGN
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