Title :
Propagation characteristics in land mobile satellite systems
Author :
Yoshikawa, Makoto ; Kagohara, Masahiro
Author_Institution :
Electr. Commun. Lab., NTT, Kanagawa, Japan
Abstract :
A description is given of experiments on land mobile satellite systems carried out with the Engineering Test Satellite-V (ETS-V) at 1.6 and 1.5 GHz. Typical propagation characteristics observed, a received power distribution measured in a local area, and estimation methods for received signal variations caused by a building and a single tree are described. It is shown that the shadowing effects of a building can be estimated exactly from a knife-edge diffraction model. Single-tree attenuation can be estimated from the relation between the area of the first Fresnel zone and the area that the tree occupies in it. It is concluded that mobile satellite communication services are achievable on about 90% of the main road in the area including local cities in Japan
Keywords :
mobile radio systems; radiowave propagation; satellite relay systems; 1.5 GHz; 1.6 GHz; ETS-V; Engineering Test Satellite-V; Japan; attenuation; building; first Fresnel zone; knife-edge diffraction model; land mobile satellite systems; propagation characteristics; radiowave propagation; received power distribution; received signal variations; shadowing effects; single tree; Area measurement; Attenuation; Diffraction; Fresnel reflection; Power distribution; Power engineering and energy; Power measurement; Satellites; Shadow mapping; System testing;
Conference_Titel :
Vehicular Technology Conference, 1989, IEEE 39th
Conference_Location :
San Francisco, CA
DOI :
10.1109/VETEC.1989.40130
