Title page for ETD etd-11222002-112331


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.

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