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Lilly, Christopher John
(1987).
DOI: https://doi.org/10.21954/ou.ro.000100ce
Abstract
This thesis considers the theory, application, and design principles of atmospheric optical line of sight communication systems and in particular the effect of atmospheric turbulence on the error rate performance of digital terrestrial systems is considered in some detail. In order to aid understanding of the physical processes involved, a qualitative model is presented which is followed by a quantitative analysis and model. These models utilise the atmospheric refractive index structure parameter which is shown to be a measure of atmospheric turbulence. A hypothesis is proposed which relates the atmospheric refractive index structure parameter to the error rate performance of terrestrial optical communication systems. Practical data obtained on a typical link as part of this research work is reported which shows that there is indeed a relationship between the atmospheric refractive index parameter and error rate performance as proposed in the hypothesis. The degree of correlation of the practical data with the theory is such that the hypothesis is readily validated. Techniques for alleviating the effects of atmospheric turbulence are also considered.
CORE (COnnecting REpositories)
CORE (COnnecting REpositories)
