Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2010. / Thesis presented in partial fulfilment of the requirements for the
degree Master of Science in Engineering at
the University of Stellenbosch / ENGLISH ABSTRACT: In 1966, D.B. Leeson presented his model on phase noise in a letter entitled A
Simple Model of Feedback Oscillator Noise Spectrum. This model usually requires
an additional e ffective noise figure in order to conform with measured results. (This
e ffective noise fi gure has to be determined by means of curve-fi tting Leeson's model
with the measured results.) The model is, however, relatively simple to use, compared
with other more accurate phase noise models that have since been developed
and which can only be solved numerically with the aid of computers. It also gives
great insight regarding component choices during the design process.
Therefore several experiments were conducted in order to determine conditions under
which Leeson's model may be considered valid and accurate. These experiments, as
well as the conclusions drawn from their results, are discussed in this document. / AFRIKAANSE OPSOMMING: In 1966 stel D.B. Leeson sy faseruis model bekend in 'n brief getiteld A Simple
Model of Feedback Oscillator Noise Spectrum. Hierdie model vereis gewoonlik die
gebruik van 'n bykomende e ektiewe ruissyfer, sodat die model ooreenstem met die
gemete resultate. (Hierdie e ektiewe ruissyfer kan slegs bepaal word deur middel van
krommepassings tussen Leeson se model en die gemete resultate.) Die model is egter
relatief eenvoudig om te gebruik in teenstelling met ander, meer akkurate, faseruis
modelle wat sedertdien ontwikkel is en slegs met behulp van rekenaars opgelos kan
word. Dit bied ook onoortre
ike insig ten opsigte van komponent keuses tydens die
ontwerpsproses.
Om hierdie rede is verskeie eksperimente uitgevoer met die doel om toestande te
identi seer waaronder Leeson se model as geldig en akkuraat geag kan word. Hierdie
eksperimente, asook die gevolgtrekkings wat van hul resultate gemaak is, word in
hierdie dokument behandel.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/5424 |
| Date | 12 1900 |
| Creators | Van der Merwe, John |
| Contributors | De Swardt, J. B., Van der Walt, P. W., University of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. |
| Publisher | Stellenbosch : University of Stellenbosch |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | 99 p. : ill. |
| Rights | University of Stellenbosch |
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