PROPAGATION MEASUREMENTS FOR LAND-MOBILE SATELLITE SERVICES IN THE 800 MHZ BAND

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 a land-mobile satellite system operating in the 800 MHz band. In the suburban and rural areas which could be served by such a satellite system, multipath fading and shadowing by terrain obstacles were the main phenomena to be characterized. In the absence of a suitable satellite source, various simulation methods were used. Measurements of deciduous foliage attenuation gave a value of 0.29 dB per metre of foliage depth. At a source evaluation angle of 15 to 20 degrees the mean signal attenuation in shadowed locations was 7 dB, with less than 10.4 dB at 95% of the locations in the test area. Measurements of fading statistics in unshadowed locations, using a conical log-spiral antenna, showed the diffuse multipath signals to be typically 11 dB below the direct component. TRUNCATED
Report Number
TN-724 —
Date of publication
15 Aug 1984
Number of Pages
51
DSTKIM No
85-00640
CANDIS No
45471
Format(s):
Hardcopy;Originator's fiche received by DSIS

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