Date of Award

Summer 2019

Document Type

Open Access Thesis

Department

Electrical Engineering

First Advisor

David Matolak

Abstract

V2V and V2I systems have been an increasingly important topic of study in recent years. Future V2I systems could involve antennas near or on the curb at intersections or on the ground along highways. To this end the curbside antenna to vehicle channel has not been studied very much. The scope of this thesis is to develop initial models for the path loss for examples of this channel. This was done through a measurement campaign where the transmitting antenna is located on the ground near the road and the receiver is in a vehicle driving towards the transmitter. The vehicle drove a distance of 100 m toward the transmitter and received power was recorded loss in route; from received power and other known link parameters, path loss was calculated. This test was done at three distinct frequencies, 700 MHz, 2.4 GHz and 5 GHz, at two different locations, rural and urban, and with two different antenna positions, inside and outside of the vehicle. A log-distance path loss model was created for each case and the path loss exponents, intercept points, and standard deviations of the path loss fit lines were tabulated. It was found that the urban location tended to have smaller path loss exponents than the rural location. The urban exponents were closer to 2, the exponent of free-space, and this result is most likely due to multipath components in the less open environment. The 5 GHz cases had the lowest path loss exponents, all near 1; this indicates significant waveguiding by the street-side buildings in the urban case at this frequency. The path loss exponents ranged from 1.1 to 3.6, and standard deviations ranged from 4.9 to 13.1 dB.

Rights

© 2019, Patrick Murphy

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