Date of Award
Master of Engineering (MEngr)
Visible light communication—(VLC) provides wide bandwidth and high security
capabilities for free space optical communication. This thesis presents the key concepts,
underlying principles and practical applications of visible light communications. In
particular, this thesis focuses on the received power distribution pattern and signal to noise
ratio for line-of-sight indoor and vehicular applications. Several methods are used to
modify the SNR and power distribution levels. It is shown that in the absence of
obstruction, the optical footprint is nearly circular and offers a platform for large- scale
deployment in commercial environments, which is similar to micro and Pico cells.
By studying various kinds of commonly used VLC channel analysis: diffuse and
line of sight channels, a simple improved indoor and intra-vehicular VLC transmission
model for power distribution and SNR is presented. Employing optical wireless
communications within the vehicle not only enhances user mobility, but also alleviates
radio frequency interference, and lowers system cost through the utilization of license free
spectrum. Moreover, a solution to increase the received power by changing the semi angle
at half power is presented. The simulation results show the improved received power
distribution and SNR. A VLC system, based on color-shift-keying (CSK) modulation and
code-division multiple-access (CDMA) is presented. CSK–CDMA VLC system is used to
enhance the VLC system capacity and mitigate single color light interference, which allows
multiple users to access the network.
Shaaban, Rana Rageh, "Enhanced Optical Wireless Channel For Indoor And Intravehicle Communications: Power Distribution And Signal To Noise Ratio Analysis" (2017). Theses and Dissertations. 2342.