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UBC Theses and Dissertations
Effect of system and environmental parameters upon coverage provided by the ORBCOMM land mobile satellite system Ma, Jueren (Steven)
Abstract
While land mobile satellite systems operating at VHF (150 MHz) should provide better coverage in urban and suburban environments than similar systems that operate at L-band (1 GHz and above), previous work has not quantified the improvement. Here, we fill that gap by presenting results obtained with a 3D-satellite signal propagation model that we have developed around the NEC-BSC U T D code. Results obtained using a representative street geometry show that the mean signal at VHF may be as much as 6 dB stronger than that at L-band with a standard deviation that is almost 2 dB less. Results also show that an antenna with a hemispherical pattern can provide much more effective coverage than the A/4 monopole antenna which has traditionally been the most popular antenna for ORBCOMM applications.
Item Metadata
Title |
Effect of system and environmental parameters upon coverage provided by the ORBCOMM land mobile satellite system
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2005
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Description |
While land mobile satellite systems operating at VHF (150 MHz) should provide better
coverage in urban and suburban environments than similar systems that operate at L-band
(1 GHz and above), previous work has not quantified the improvement. Here, we fill that
gap by presenting results obtained with a 3D-satellite signal propagation model that we
have developed around the NEC-BSC U T D code. Results obtained using a representative
street geometry show that the mean signal at VHF may be as much as 6 dB stronger
than that at L-band with a standard deviation that is almost 2 dB less. Results also show
that an antenna with a hemispherical pattern can provide much more effective coverage
than the A/4 monopole antenna which has traditionally been the most popular antenna for
ORBCOMM applications.
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Genre | |
Type | |
Language |
eng
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Date Available |
2009-12-10
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0065556
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
2005-05
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.