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An empirical model for high elevation angle land-mobile satellite channels at urban environment

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3 Author(s)
Kanatas, A.G. ; Dept. of Electr. Eng. & Comput. Sci., Nat. Tech. Univ. of Athens, Greece ; Papadakis, N. ; Constantinou, Philip

A land mobile satellite system (LMSS) propagation measurement campaign at 1.8 GHz was launched in Athens city center during June 1996 for high elevation angle (60/spl deg/, 70/spl deg/ and 80/spl deg/) channels. Four narrow streets with large building blocks and heavy traffic were tested. A new empirical model is extracted to calculate the link margin required to compensate for multipath fading in urban environments. A comparison with an existing model is presented. The results show a considerable increase in the fade depth compared to suburban and rural environments. In general, the fade depth decreases with increasing elevation angle, and the overall analysis indicates a strong dependence of the signal attenuation on the width of the streets, the average building height and the vegetation at the edges of the streets.

Published in:

Communications Letters, IEEE  (Volume:2 ,  Issue: 4 )

Date of Publication:

April 1998

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