Rihawi, Zeina (2016) Optical wireless channel characterisation in guided structures (vehicle applications). PhD thesis, University of Warwick.

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Abstract

The field of automotive electronics is growing exponentially in terms of devices related to safety, driver assistance and a variety of other nodes connected to infotainment systems which become standards with every automobile. Networking protocols connect these systems to provide assistance to drivers. However, the demand of high-bandwidth to serve applications lead to the necessity of a more flexible communication
network within the vehicle

This thesis proposes using optical wireless links in intra-vehicle applications where different parts of the vehicle can form signal transferring media. A vehicle chassis can be represented as an optical wireless waveguide, where Line-of-sight (LOS) or a diffuse optical wireless link exists.

In order to predict the validity of the idea, optical wireless channel characteristics should be determined. This thesis describes the design of a modified Monte Carlo simulation tool for modelling a waveguide optical wireless channel. The simulator has the ability to determine the channel characteristics, and it can also be used more generally for indoor systems. The simulator studies the effect of purely diffuse and purely reflective materials as well as mixed diffuse-specular materials. The program was validated by comparing it with other indoor simulation studies and with a laboratory experiment for straight waveguide.

Emphasis was placed on understanding the requirements of LOS and diffusing optical wireless communication links. Results are presented for straight and bent waveguides received power, path loss and bandwidth for a series of receiver areas and fields-of-view. Studying the coupling effect between two waveguides which are different in dimensions has been assessed for series of transmitter directions. All studies have been undertaken for two types of materials (scattered and reflective) and two kinds of transmitters (omnidirectional and directional).

The study shows that the waveguides are plausible candidates to convey signals with high bandwidth, but a high power transmitter or an array of Light Emitting Diodes (LEDs) is needed due to power limitations.

Item Type:	Thesis (PhD)
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TL Motor vehicles. Aeronautics. Astronautics
Library of Congress Subject Headings (LCSH):	Wireless communication systems, Optical communications, Automotive computers, Mobile computing
Official Date:	April 2016
Dates:	Date Event April 2016 Submitted
Institution:	University of Warwick
Theses Department:	School of Engineering
Thesis Type:	PhD
Publication Status:	Unpublished
Supervisor(s)/Advisor:	Green, Roger,1951- ; Leeson, Mark S.,1963-
Extent:	xvii, 178 leaves :illustrations (chiefly colour), charts (chiefly colour).
Language:	eng

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