PROPAGATION MEASUREMENTS FOR LAND-MOBILE SATELLITE SYSTEMS AT 1542 MHZ

Authors
  1. Butterworth, J.S.
Corporate Authors
Communications Research Centre, Ottawa ONT (CAN)
Abstract
A measurement program was undertaken with the objective of providing engineering design data on excess path-loss for potential land-mobile satellite systems operating in the 1500 MHz band. In the suburban and rural areas which could be served by such a system, fading due to multipath propagation and shadowing by terrain obstacles were the two phenomena characterized. Using an omni-azmuth vehicle antenna to recieve a signal at 20 degrees elevation from the MARECS A satellite, the diffuse multipath signals were found to be 10 dB less than the direct component. The percentage of shadowed locations on the test routes varied from 5% in open farmland and to 33% in suburban locations. The corresponding signal margins required to provide 99% coverage over the various test routes ranges from 12 dB to 21 dB.
Report Number
TN-723 —
Date of publication
15 Aug 1984
Number of Pages
33
DSTKIM No
85-00639
CANDIS No
45470
Format(s):
Hardcopy;Originator's fiche received by DSIS

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