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Practical design considerations for digital mobile radio systems operating in the mountainous terrain

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3 Author(s)
Hashemi, H. ; Dept. of Electr. Eng., Sharif Univ. of Technol., Teheran, Iran ; Sajjadi, B.A. ; Tabatabaei, V.

Two methods for reducing the relative strength of long-delayed echoes received in mobile radio environments in the presence of distant reflectors are explored. These methods are: (i) the application of directional base antennas with the main lobe facing the service area in order to avoid direct illumination of the mountain, and (ii) installing base antennas inside built-up areas rather than at the city boundaries where a clear view of mountains may exist. Using a simulation study based on a recently developed path loss model, the effectiveness of the measures in reducing the strength of long-delayed echoes and the delay spread is quantified. The method and the results are described

Published in:

Vehicular Technology Conference, 1993., 43rd IEEE

Date of Conference:

18-20 May 1993