| Type of Document |
Master's Thesis |
| Author |
Mousselon, Laure
|
| Author's Email Address |
lmoussel@vt.edu,laure_mousselon@yahoo.fr |
| URN |
etd-11222002-112331 |
| Title |
Radio Wave Propagation Measurements and Modeling for Land Mobile Satellite Systems |
| Degree |
Master of Science |
| Department |
Electrical and Computer Engineering |
| Advisory Committee |
| Advisor Name |
Title |
| Stutzman, Warren L. |
Committee Chair |
| Davis, William A. |
Committee Member |
| Pratt, Timothy J. |
Committee Member |
|
| Keywords |
- Cumulative Fade Distribution
- Measurements
- Lognormal
- LMSS
- S-band
- Propagation Model
- DARS
- Shadowing
- Propagation Simulator
- Average Fade Duration
- Level Crossing Rate
- Rayleigh
- Ricean
- Dual Satellites
|
| Date of Defense |
2002-11-20 |
| Availability |
unrestricted |
Abstract
The performance of a mobile satellite communications link is conditioned by the characteristics of the propagation path between a satellite and mobile users. The most important propagation effect in land mobile satellite system is roadside attenuation of the signals due to vegetation or urban structures. System designers should have the most reliable information about the statistics of the propagation channel to build reliable systems that can compensate for bad propagation conditions.
In 1998, the Virginia Tech Antenna Group developed a simulator, PROSIM, to simulate a propagation channel in the case of roadside tree attenuation in land mobile satellite systems. This thesis describes some improvements to PROSIM, and the adaptation and validation of PROSIM for Digital Audio Radio Satellite systems operating at S-band frequencies. The performance of the simulator for S-band frequencies was evaluated through a measurement campaign conducted with the XM Radio signals at 2.33 GHz in various propagation environments. Finally, additional results on dual satellite systems and fade correlation are described.
|
| Files |
| Filename |
Size |
Approximate Download Time
(Hours:Minutes:Seconds)
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| 28.8 Modem |
56K Modem |
ISDN (64 Kb) |
ISDN (128 Kb) |
Higher-speed Access |
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thesisfinal_version1.pdf |
2.37 Mb |
00:10:57 |
00:05:38 |
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