Title page for ETD etd-07292009-090621
|Type of Document
||A model for predicting indoor signal levels of satellite transmitted signals
||Master of Science
|Bostian, Charles W.
|Stutzman, Warren L.
|Woerner, Brian D.
|Date of Defense
Several possible approaches to creating a model for predicting satellite signal levels inside
buildings are examined. These models make use of resonant cavity modes and vector ray
addition. The cavity mode approach yields inconclusive results because of a problem with
uniqueness, there are too many potential modes and no obvious way to decide between
them. The ray model uses vector representation. It tracks changes, and combines rays at
the receiver. Signal levels are normalized to free space values. An algorithm for the
construction of such a model is developed and results are obtained. A three ray model,
incorporating LOS, floor, and ceiling reflected rays gives reasonable agreement with
experimental data. The types of information needed are the room height, the receiver
height, if the receiver is in the vicinity of a window, and the elevation angle of the satellite.
This model shows that a user has to move only a small distance to find an area where
fading is brought to acceptable levels.
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